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OceanBase Cloud Platform

V4.4.2
  • What's New
    • Product Updates
  • Product Introduction
    • What is OceanBase Cloud Platform
    • Differences between Enterprise Edition and Community Edition
    • System architecture
    • Features
    • Limits
      • System requirements
      • Dependencies
  • Deploy OceanBase Cloud Platform (OCP)
    • Deploy OceanBase Cloud Platform (OCP) Enterprise Edition
      • Deployment overview
        • Deploy OCP cluster in the Single-node
        • Deploy OCP cluster in the High-availability
      • Prepare the deployment environment
        • Install OAT
        • Add a server
        • Check the environment
      • Deploy OCP
        • Plan resources
          • Host resources
          • OCP service configuration requirements
          • MetaDB Resources
          • MonitorDB Resources
        • Deploy OCP
          • Prepare installation media
          • Create MetaDB
          • Install OCP
          • Register an OCP cluster
          • Initialize system parameters
        • Check after deployment
      • Deployment FAQ
        • Optimize MonitorDB parameters
        • F5 Big-IP LTM and alert configuration
          • Connect OBProxy to F5 Big-IP LTM
          • Connect OCP-Console to F5 Big-IP LTM
          • Monitor the OCP service health
        • Ubuntu deployment FAQ
        • EulerOS deployment FAQ
        • Client requirements
        • Start and stop OCP
      • Appendix
        • Uninstall OCP
        • Check the NTP offset
    • Deploy OceanBase Cloud Platform (OCP) Community Edition
      • Overview
      • Installation process
      • Installation planning
        • User planning
        • Host planning
        • Disk and directory planning
        • Port planning
      • Prepare for the installation
      • Deploy OCP on the GUI
      • Use Docker to deploy OCP
      • Post-deployment check
      • Appendix
        • Install Docker
        • Uninstall OCP
        • Restart OCP
        • FAQ about deployment
  • Upgrade OceanBase Cloud Platform (OCP)
    • Upgrade OceanBase Cloud Platform (OCP) Enterprise Edition
      • Overview
      • Considerations
      • Preparations
      • Upgrade OCP
        • Take over OCP
        • Upgrade OCP
      • Verify after upgrade
        • Verify the cluster feature
        • Verify the tenant feature
        • Verify the host feature
        • Verify the software package feature
        • Verify the OBProxy feature
        • Verify the backup and restore feature
        • Verify alerts
        • Verify the task feature
        • Verify the password box feature
      • Appendix
        • Change a user's password
        • Version mapping
    • Upgrade OceanBase Cloud Platform (OCP) Community Edition
      • Upgrade OCP on the GUI
      • Upgrade OCP using Docker containers
      • Post-upgrade check
  • Quick Start
    • OCP operations
    • Log on to the OCP console
    • Upload a software package
    • Add hosts
    • Create a cluster
    • Create a primary tenant
    • Create a user
    • Create an OBProxy cluster
  • Cluster Management
    • Overview
    • Create a cluster
      • Create a distributed cluster
      • Create a standalone deployment
    • Manage clusters
      • Create a standby cluster
      • View details of a cluster
      • Scale a standalone system to a distributed cluster
      • Take over a cluster
      • Restart a cluster
      • Stop a cluster
      • Move out a cluster
      • Delete a cluster
      • Change the password
      • Manage Arbitration Service of a cluster
        • Add an arbitration service
        • Add an arbitration service group
        • Replace the arbitration service for a cluster
        • Remove an arbitration service
      • Enable automatic detection of deadlocks
      • Disable automatic detection of deadlocks
      • Manage O&M configuration
        • Overview
        • Manage parameters
        • View the parameter modification history
        • Configure resources for OCP Agent
      • Manage CPU binding configurations
      • View tenant-level information
      • Import a license
      • View the license
    • Manage zones of a cluster
      • Add a zone
      • Edit a zone
      • Restart a zone
      • Stop a zone
      • Delete a zone
    • Manage OBServers of a cluster
      • Add an OBServer node
      • Restart a faulty OBServer node
      • Stop an OBServer service
      • Stop an observer process
      • Replace an OBServer node
      • Reinstall an OBServer
      • Delete an OBServer
    • Upgrade version
    • View the topology of a cluster
    • Overview of cluster tenant management
    • View real-time monitoring data
    • Manage cluster resource
      • View the unit distribution
      • View resource usage
    • Manage major compaction of a cluster
      • Modify the major compaction settings of a cluster
      • Perform a major compaction
      • View details of a major compaction
      • View statistics of a major compaction
      • View the major compaction records
    • Manage security configurations
      • Manage SSL Link Encryption
      • Manage Transparent Data Encryption (TDE)
    • Manage SQL Audit
    • Manage cluster parameters
      • Parameter types
      • View parameters
      • Modify parameters
      • View the history of parameter changes
    • Manage Arbitration Services
      • Arbitration service Overview
      • Create an arbitration service
      • Take over an arbitration service
      • Stop an arbitration service
      • Start an arbitration service
      • Upgrade an arbitration service
      • Restart an arbitration service
      • Migrate an arbitration service
      • Replace an arbitration service
      • Associate a cluster
      • Dissociate an arbitration service
      • Delete an arbitration service
    • Manage Service Groups
      • Overview
      • Create an arbitration service group
      • Upgrade an arbitration service group
      • Edit an arbitration service group
      • Delete an arbitration service group
    • Manage cluster parameter templates
  • Tenant Management
    • Tenant and resource management
    • View tenant overview information
    • Create a primary tenant
    • Manage tenants
      • Overview
      • Create a standby tenant
      • Copy a tenant
      • Rename a tenant
      • Lock a tenant
      • Clone a tenant
      • Delete a tenant
      • Change the password of the sys tenant
      • Change the synchronization configuration
      • Enable Asymmetric Zone
      • Configure full link tracking for a tenant
      • Manage tenant parameters
      • Change the primary/standby protection mode
      • Modify the allowlist of a tenant
      • Modify the zone priority
      • Manage the binlog service for a tenant
      • Manage service names
    • Manage topulogy of a tenant
      • View tenant topology
      • View the topology of the primary/standby relationships of a tenant
    • Manage replicas of a tenant
      • Add a replica
      • Edit tenant replicas in a zone
      • Delete a tenant replica from a zone
      • Delete a unit
    • Manage databases
    • Manage users and permissions under a tenant
      • Manage users in a MySQL tenant
      • Manage user under an Oracle tenant
        • User overview under an Oracle tenant
        • Create a user under an Oracle tenant
        • Lock an Oracle tenant user
        • Change the password of a user under an Oracle tenant
        • Delete a user under an Oracle tenant
        • Create a role under an Oracle tenant
        • Manage users
        • Manage roles
      • System permissions
    • Manage resource isolation
      • Overview
      • Create a resource group
      • Create a resource isolation plan
      • Enable or disable a resource isolation plan
      • Modify a resource isolation plan
      • Delete a resource isolation plan
      • Modify a resource group
      • Delete a resource group
    • Manage the resources of a tenant
    • Manage major compaction under a tenant
      • Modify major compaction settings of a tenant
      • View details of tenant major compaction
      • Perform a major compaction
      • View the major compaction records
    • Manage statistical information
      • Overview
      • Collect statistics
      • Manage statistics collection tasks
    • Manage tenant parameters
      • View the parameters
      • Modify a parameter
      • View the parameter modification history
    • Manage unit specifications
    • View OCP resource unit specifications
    • Manage tenant parameter templates
  • OBProxy Management
    • OBProxy management overview
    • View details on the OBProxy page
    • Create an OBProxy cluster
    • Manage OBProxy Clusters
      • View details on the Overview page of an OBProxy cluster
      • Add a connectable OceanBase cluster
      • Manage load balancing
      • Change the password of the proxysys user
      • Change the password of the proxyro user
      • Move out an OBProxy cluster
      • Delete an OBProxy cluster
      • Upgrade an OBProxy cluster
      • Manage CPU core binding configurations
      • Stop or start an ODP cluster
      • Restart an ODP cluster
      • Delete a connected OceanBase cluster
      • Manage the proxyro account
    • Manage OBProxy Servers
      • Add an OBProxy
      • Take over OBProxy
      • Delete an OBProxy
      • Restart an OBProxy
      • Stop or start an OBProxy
      • Remove an OBProxy
      • Launch an OBProxy
      • Upgrade an OBProxy
      • Refresh OBProxy configurations
    • Request analysis
    • Manage security configurations
    • Manage OBProxy cluster parameters
    • Client configuration
    • Manage OBProxy parameter templates
    • OBProxy parameters descpription
  • Binlog Service Management
    • Overview of Binlog service
    • Create a binlog cluster
    • Manage Binlog Clusters
      • View information about a binlog cluster
      • Upgrade a binlog cluster
      • Start and stop a binlog cluster
      • Restart a binlog cluster
      • Delete a binlog cluster
      • Manage binlog cluster parameters
    • Manage Binlog Instance
      • View a binlog instance
      • Add an instance replica
      • Configure throttling
      • Start and stop a binlog instance
      • Restart a binlog instance
      • Switch primary and standby instances
      • Delete a Binlog instance
      • Manage binlog instance parameters
    • Manage Binlog Server
      • Add a binlog node
      • Start and stop a binlog server
      • Delete a binlog server
      • Clear binlog instances on a host
    • Manage binlog parameter templates
  • Host Management
    • Manage hosts
      • Host management operations
      • View host details
      • Add a host
      • View the details of tasks on a host
      • Modify a host
      • Restart OCP-Agent
      • Reinstall OCP Agent
      • Remove a host
      • Check host standardization
      • Host standardization check items
      • OCP-Agent processes
      • OCP-Agent O&M Script Instructions
    • Manage Host Types
    • Manage IDCs
    • Manage Regions
  • Alert Management
    • Overview
    • Alert-related concepts
    • View the alert overview
    • Manage alert rules
      • Create an alert rule
      • View an alert rule
      • Copy an alert rule
      • Edit an alert rule
      • Delete an alert rule
      • Alert rule groups
      • Export alert rule configurations
    • Manage alert templates
      • Create an alert template
      • Set alert objects
      • Export alert templates
      • View an alert template
      • Copy an alert template
      • Edit an alert template
      • Delete an alert template
    • Manage alert channels
      • Create an alert channel
      • View an alert channel
      • Edit an alert channel
      • Copy an alert channel
      • Delete an alert channel
      • Examples of alert channel configuration
      • Sample alert channel settings
    • Manage alert push
      • Create an alert push
      • View an alert push
      • Edit an alert push
      • Delete an alert push
    • View alert events
    • Manage blocking conditions
      • Create a blocking condition
      • Edit an alert blocking condition
      • Delete an alert blocking condition
    • OCP alert template tag
    • Optional monitoring metrics for custom alerts
  • Dashboard Management
    • Monitoring dashboard overview
    • Manage dashboards
    • Manage groups
    • Manage charts
  • Performance Monitoring
    • Manage monitoring
      • Overview
      • View database performance
      • View host performance monitoring data
      • View OBServer node performance monitoring data
      • View performance and SQL monitoring data
      • View transaction performance monitoring data
      • View storage and cache monitoring data
      • View database object monitoring data
      • View OBKV-Table monitoring data
      • View OBKV-HBase monitoring data
      • View OBKV-Redis monitoring data
      • View subscription connection monitoring charts
      • View performance monitoring data of a binlog instance
      • View resource monitoring data of a binlog instance
      • View host resource monitoring data
      • View host process monitoring data
      • View service monitoring data
      • View system monitoring data
      • View performance monitoring
      • Drill-down monitoring
      • Integrate monitoring data to an external time-series system
    • Use the custom monitoring feature
      • Overview
      • View collection items
      • Manage indicator items
        • Create a metric
        • Manage metrics
      • Manage charts
        • Create a chart
        • Manage charts
      • OCP metrics
  • Diagnostics and Tuning
    • SQL diagnostics
      • SQL diagnostics introduction
        • SQL diagnostics overview
        • SQL statement execution statistics
        • SQL execution plans
      • View the OceanBase Autonomy Service page
      • Diagnose suspicious SQL statements
      • Diagnose top SQL statements
      • View Comparison of Top SQL Statements
      • Diagnose slow SQL statements
      • Diagnose parallel SQL statements
      • Diagnose high-risk SQL statements
      • Diagnose new SQL statements
      • View the details of an SQL statement
      • View outlines
      • View the SQL collection enabling/disabling history
      • View SQL request analysis data
      • Parameters related to SQL performance diagnostics
    • Transaction diagnostics
      • Transaction overview
      • Diagnose transactions
      • Diagnose XA transactions and suspended transactions
    • Manage sessions
      • Manage the sessions of a tenant
      • View session statistics
      • View the deadlock history
      • View row lock analytics
    • View materialized views
    • View the Optimization Center page
    • View the capacity center
    • View diagnostics reports
      • Manage performance reports
      • Manage ASH reports
  • O&M Management
    • Manage information collection
      • Overview
      • Configure information collection items
      • Create an information collection task
      • View information collection details
      • Download an information collection report
    • Manage plans
      • Overview
      • Manage plans
      • View plan execution details
    • Manage inspections
      • Overview
      • Configure inspection items
      • Configure scheduling rules
        • Configure a scheduling rule for a single inspection object
        • Configure global scheduling rules
      • Initiate an inspection
        • Initiate an inspection for a single object
        • Initiate a global inspection
      • View an inspection task
      • Manage inspection reports
        • View an inspection report
        • Download an inspection report
    • Manage scheduled tasks
      • Overview of Scheduled Tasks
      • Create a scheduled task
      • Manage scheduled tasks
      • View scheduled task details
    • Manage the report center
  • AI Assistant
    • Overview
    • Enable AI-powered intelligent conversation
    • Manage an AI intelligent conversation
  • Backup and Recovery
    • Overview
    • Backup and restore guide
    • Overview
    • Backup now
      • Back up a cluster now
      • Perform tenant backup immediately
    • Regular backup
      • Manage cluster-level backup strategy
        • Create a cluster-level backup strategy
        • Modify a cluster-level backup strategy
        • Delete a cluster-level backup strategy
        • Pause backup scheduling
        • View a cluster-level backup stategy
      • Manage tenant-level backup strategy
        • Create a tenant-level backup strategy
        • Modify a tenant-level backup strategy
        • Delete a tenant-level backup strategy
        • Pause backup scheduling
        • View a tenant-level backup stategy
    • Manage backup tasks
      • View backup tasks
      • View second backup tasks
    • Initiate a restore task
    • Regular recovery
      • Create a sampling strategy for recovery
      • View sampling strategies
      • View sampling tasks
    • View restore task information
    • Copy a restore task
    • Manage backup and recovery service
      • View services
      • Install a service
      • Add a node
      • Upgrade the version of a service
      • Update service configurations
      • Copy a service
      • Delete a service
      • Stop a service on a node
      • Restart a service on a node
      • View O\&M tasks
      • Uninstall a service on a node
  • Disaster Recovery
    • Switching primary and standby tenants
      • Switchover
      • Failover
      • Decouple a standby tenant from its primary tenant
      • Create primary and standby tenants across OCP clusters
    • Switching primary and standby databases
      • Routine primary/standby cluster switchover
      • Primary/Standby cluster switchover for disaster recovery
      • Decouple a standby cluster from the primary cluster
      • Start the original primary cluster in read-only mode after a failover
    • OCP Manage OCP clusters in the multi-cluster mode
      • OCP multi-cluster mode overview
      • Register an OCP cluster
      • View Leader \& Follower Details
      • Manage OCP cluster parameters
      • Switch an OCP cluster in daily maintenance
      • Switch an OCP cluster in a failover
      • Delete a faulty follower OCP cluster
      • Unbind a leader and a follower OCP cluster
      • Enable the OCP multi-cluster mode
  • Log Management
    • Query logs
    • Download logs
    • Configure trace query parameters
    • Trace query
    • About OpenSearch
    • Configure log retention strategies
  • Software Package Management
    • Upload a software package
    • Download a software package
    • Delete a software package
  • System Management
    • Manage password box
      • Create a credential
      • Export a credential
      • Import a credential
      • Verify a credential
      • Edit a credential
      • Delete a credential
      • Batch operations on credentials
    • Manage certificates
      • Certificate overview
      • Upload a certificate
      • Delete a certificate
    • Manage users and permissions
      • Overview
      • Manage a organization
        • Create an organization
        • View the resources of an organization
        • Rename an organization
        • Share resource configurations
        • Delete an organization
      • Manage a role
        • Create a role
        • View a role
        • Edit a role
        • Copy a role
        • Delete a role
        • Default OCP roles
      • Manage a user
        • Create a user
        • View a user
        • Edit a user
        • Copy a user
        • Change the password of a user
        • Delete a user
        • View the login history
    • Manage tags
      • Overview
      • Create a tag
      • Modify objects bound to a tag
      • Edit a tag
      • Delete a tag
    • View operation records
    • Manage external integration
      • Manage AI models
        • Connect to an AI model vendor
        • Add a model
        • Set a system model
        • Delete a model
      • Manage SSO integration
        • Overview
        • Create an SSO integration task
        • Enable/Disable an SSO integration task
        • Edit an SSO integration task
        • Delete an SSO integration task
      • Manage SQL audit
        • Overview of SQL Audit Integration with SLS and ES
        • Connect SQL Audit to SLS
        • Connect SQL Audit to ElasticSearch
      • Manage Prometheus
        • Overview of Prometheus
        • Create a Prometheus data source
        • Manage Prometheus data sources
    • View platform monitoring data
    • Manage system parameters
      • View system parameters
      • Modify system parameters
      • OCP configuration parameters
    • Manage tasks
    • User center management
      • Configure personal information
      • Change your logon password
      • Log off the OCP console
  • SQL Tuning Practices
    • Locate General Abnormal SQL Statements
      • How can I locate SQL statements with high CPU load in a tenant?
      • How can I locate slow SQL statements that take a long time in a tenant?
      • How can I locate SQL statements for full-table scans in a tenant?
      • How can I locate distributed SQL statements in a tenant?
      • How can I locate remote SQL statements in a tenant?
      • How can I locate slow hard-parsed SQL statements in a tenant?
      • How can I locate erroneous SQL statements in a tenant?
    • Customize Abnormal SQL Statement Determining Rules
      • Conditions
      • Custom column rules
    • General SQL Performance Tuning Scenarios
      • Execution Plan Optimization
        • SQL statement performance deterioration caused by plan changes
      • Index Optimization
        • No suitable indexes
        • Inappropriate index of an SQL statement
        • Invalid index of an SQL statement
  • O&M Best practices
    • Upgrade an OceanBase cluster
    • Migrate a resource unit from an OceanBase Database tenant
    • Expand the high availability of OceanBase clusters and tenants
    • Reduce the high availability of OceanBase clusters and tenants
    • Scale out an OceanBase cluster and scale up an OceanBase Database tenant
    • Scale in an OceanBase cluster and scale down an OceanBase Database tenant
    • Troubleshoot host issues in an OceanBase cluster
    • Migrate a cluster between IDCs in OCP
    • Migrate an OceanBase cluster to another IDC
    • Perform a failover between primary and standby OceanBase clusters for disaster recovery in a scenario with two IDCs
    • Perform a switchover between primary and standby OceanBase Database tenants in a scenario with two IDCs
    • Use the arbitration service of OceanBase Database to achieve HA in a scenario with two IDCs
    • Achieve high availability through an arbitration service group
    • Scale out an OBProxy cluster
    • Scale in an OBProxy cluster
    • Replace an OBProxy
    • Move out an OBProxy cluster
    • Take over OBProxies
    • Delete an OBProxy
    • SSL Link Encryption
    • Perform a failover
    • Decouple a standby tenant from the primary tenant
    • Automatic routing to the new primary tenant after a switchover
    • Back up an OceanBase cluster
    • Restore lost data by using backup and restore
    • Monitor the business load of OceanBase Database
    • Integrate OCP monitoring with Prometheus
    • Import a monitoring dashboard to Grafana
    • Configure custom monitoring
    • Perform an inspection in OCP to detect potential risks in an OceanBase cluster
    • Check clog synchronization
    • Check the NIC rate
    • Check the availability of an auto-increment column
    • Send alert messages to a DingTalk group
    • Send alert messages to a Feishu group
    • Send alert messages to a WeChat Enterprise group
    • Send alert messages through email
    • Push alert messages through HTTP
    • Connect alerts to a Slack channel
    • Organization and permission management
  • Reference Guide
    • Alarm reference
      • Overview
      • OceanBase alerts
        • ob_cannot_connected OceanBase server cannot be connected
        • ob_cluster_rs_not_same
        • ob_cluster_status_check_failed
        • ob_cluster_exists_inactive_server OceanBase cluster has an inactive OBServer node
        • ob_cluster_exists_index_fail_table
        • ob_cluster_frozen_version_delta_over_threshold OceanBase cluster frozen version and baseline version delta exceeds threshold
        • ob_cluster_merge_error OceanBase cluster merge error
        • ob_cluster_merge_timeout OceanBase cluster merge timeout
        • ob_cluster_no_frozen OceanBase cluster not frozen for a long time
        • ob_cluster_no_merge OceanBase cluster with no major compactions for a long time
        • ob_cluster_operation_info
        • ob_cluster_sync_failed
        • ob_cpu_assigned_percent_over_threshold OceanBase has allocated more CPU resources to the tenant than allowed
        • ob_cpu_percent_over_threshold Average tenant thread usage rate exceeds the threshold on OceanBase server
        • ob_host_connection_percent_over_threshold OceanBase server connection percentage over threshold
        • ob_host_disk_readonly OceanBase server disk read-only
        • ob_host_load1_per_cpu_over_threshold OceanBase server CPU average load1 exceeds threshold
        • ob_host_partition_count_over_threshold OceanBase server partition count exceeds the threshold
        • OceanBase log alerts
        • ob_mem_assigned_percent_over_threshold OceanBase has exceeded the threshold for memory allocated to tenants.
        • ob_server_sstable_percent_over_threshold OceanBase server data disk usage over threshold
        • ob_tenant_operation_info
        • ob_tenant500_mem_hold_over_threshold OceanBase 500 tenant memory usage exceeds the threshold
        • ob_tenant500_mem_hold_percent_over_threshold OceanBase 500 tenant memory usage over threshold
        • tenant_active_memstore_percent_over_threshold OceanBase tenant active MemStore percentage over threshold
        • tenant_cpu_percent_over_threshold OceanBase tenant CPU usage exceeds threshold
        • tenant_memstore_percent_over_threshold OceanBase tenant MemStore usage percentage exceeding the threshold
        • obproxy_process_dead The OBProxy process does not exist.
        • obproxyd_process_dead
        • obproxy_cannot_connected
        • ob_cluster_sync_delay_time_too_long OceanBase cluster synchronization delay is too long
        • ob_host_data_disk_percent_over_threshold OceanBase host data disk usage over threshold
        • ob_host_log_disk_percent_over_threshold OceanBase server log directory disk usage exceeds the threshold
        • ob_host_install_disk_percent_over_threshold OceanBase server installation directory disk usage exceeds the threshold
        • ob_tenant_exists_expired_xa_trans OceanBase tenant has expired XA transactions
        • ob_cluster_active_session_count_over_threshold
        • ob_tenant_active_session_count_over_threshold
        • ob_host_active_session_count_over_threshold
        • ob_tenant_slow_sql_exists OceanBase tenant has slow SQL
        • ob_tenant_large_trans_exist OceanBase tenant has large transactions
        • same_alarm_rule_detect_too_many_targets
        • ob_tenant_expired_trans_exist OceanBase tenant has expired transactions
        • ob_tenant_long_trans_exist
        • ob_tenant_task_timeout OceanBase tenant task timeout
        • ob_host_task_timeout
        • ob_tenant_log_disk_usage_high OceanBase tenant log disk usage exceeded the limit
        • ob_tenant_no_compaction OceanBase tenant has not performed major compaction for a long time
        • ob_tenant_no_frozen OceanBase tenant has not been frozen for a long time
        • ob_tenant_compaction_error OceanBase tenant compaction error
        • host_operation
        • obproxy_host_operation
        • obproxy_cluster_operation
        • ob_host_operation
        • refresh_location_cache_failed
        • ob_tenant_log_stream_degraded OceanBase tenant has degraded log streams
        • arbitration_service_unavailable
        • observer_process_stop OBServer process stop
        • obproxyd_process_stop OBProxy daemon process stop
        • obproxy_process_stop Stop OBProxy Process
        • standby_tenant_sync_delay_too_long
        • standby_tenant_sync_status_error
        • obproxy_client_connections_usage_over_threshold OBProxy client connection usage exceeds threshold
        • ob_tenant_request_queue_over_threshold
        • oas_anomaly_sql_from_anomaly_event_analysis_cpu_percent_high
        • oas_anomaly_sql_from_anomaly_event_analysis_perf_degradation
        • oas_anomaly_sql_from_anomaly_event_analysis_plan_changed
        • oas_anomaly_sql_from_sql_inspection_perf_degradation
        • oas_anomaly_sql_from_sql_inspection_plan_changed
        • os_observer_not_exist OceanBase server process does not exist
        • refresh_location_cache_failed_by_metric
        • ob_tenant_cpu_usage_over_threshold
        • ob_tenant_partition_replica_absent OceanBase tenant partition replica absent
        • ob_tenant_partition_leader_absent
        • ob_tenant500_storage_short_meta_mem_hold_high OceanBase 500 tenant STORAGE_SHORT_TERM module memory usage exceeds the threshold
        • obproxy_core_dump OBProxy server Core Dump
        • ob_server_cannot_connect_arbitration OceanBase cluster has nodes that cannot communicate with the arbitration service
        • agent_process_count_abnormal
        • arbitration_auto_replace_operation_info
        • arbitration_group_auto_replace_failed
        • standby_cluster_sync_status_error Standby cluster synchronization status exception
        • ob_tenant_tde_kms_host_not_match Tenant TDE KMS service address does not match the current OCP service address
        • ob_tenant_tde_kms_cmk_info_not_exist Tenant TDE key information does not exist in the current OCP. Please update the tenant TDE key promptly.
        • tenant_all_unit_server_not_connectable OceanBase Tenant Cannot Be Connected
        • ob_tenant_mview_refresh_delay Materialized View Automatic Refresh Delay
        • ob_tenant_mview_refresh_error Tenant Materialized View Automatic Refresh Exception
        • tenant_vector_mem_used_percent_over_threshold OceanBase Tenant Vector Index Actual Memory Usage Exceeds Threshold
        • tenant_mini_merge_tablet_count_error Number of Tablets Exceeding the Limit for Minor Compaction SSTables in an OceanBase Tenant
        • tenant_compact_timeout_count_error Number of OceanBase Tenant Partitions (sstables) That Have Not Been Compacted for a Long Time
        • ob_tenant_session_kill_delay Tenant Session Killed Delay
        • ob_tenant_info_sync_failed OceanBase Tenant Information Synchronization Failed
        • ob_tenant_name_mismatch The tenant name of the OceanBase tenant has changed.
        • tenant_compaction_status_is_suspend Tenant Major Compaction Suspended
        • ob_tenant_service_name_is_invalid Tenant service name is invalid.
        • cluster_cgroup_value_inconsistent Inconsistent cgroup values in the cluster
        • ob_tenant_log_stream_replica_absent Absent Replica in OceanBase Tenant Log Stream
        • ob_tenant_log_stream_leader_absent OceanBase Tenant Log Stream Leader Absent
        • arbitration_node_connection_with_observer_error Unable to connect observer on the arbitration node
      • Application alerts
        • ob_cluster_inspection_not_passed
        • ob_host_ssd_wear_indicator_over_threshold
        • ob_host_mem_percent_over_threshold Host memory usage exceeds the threshold
        • ob_host_net_recv_percent_over_threshold Host network receive bandwidth usage exceeds threshold
        • ob_host_net_send_percent_over_threshold The server's network send bandwidth usage exceeds the threshold.
        • ob_host_tcp_retrans_percent_over_threshold The percentage of TCP retransmissions exceeding the threshold on the server
        • ob_host_cpu_percent_over_threshold CPU usage on the server exceeds the threshold
        • inc_backup_delay
        • base_backup_fail
        • base_backup_too_long_time_no_one_success_task
        • backup_process_dead
        • backup_storage_capacity_over_threshold
        • backup_storage_capacity_retry_times_exceeded The maximum number of retries to obtain backup storage capacity has been exceeded.
        • backup_storage_capacity_timeout_or_interrupted Backup restore directory capacity retrieval timeout or thread interrupted
        • ocp_remote_server_time_diff_too_large
        • monitor_exporter_unavaliable A monitoring exporter is unavailable on the server.
        • system_obproxy_unavailable
        • host_unavailable
        • host_ntp_offset_too_large The offset between the host and the NTP server is too large.
        • host_ntp_service_not_exist The NTP service does not exist on the server.
        • host_agent_res_memory_over_threshold Server Agent Memory Over Threshold
        • host_agent_open_fd_count_over_threshold The number of open file descriptors for the server agent exceeds the threshold.
        • host_agent_goroutine_count_over_threshold The number of goroutines for the server agent exceeds the threshold.
        • partition_create_failed
        • obagent_dead Agent service unavailable
        • host_disk_readonly
        • ic_server_connect_failed Inter-Connector server connection failed
        • vpc_connect_failed VPC connection failed
        • node_load1_peak
        • Host log alerts
        • base_backup_timeout
        • base_secondary_backup_fail
        • ocp_meta_db_disconnected OCP Meta Database Disconnected
        • ocp_http_request_timeout
        • ocp_http_request_too_many_errors_occur
        • ocp_alarm_detect_timeout
        • odp_instance_compress_failed
        • odp_instance_expanse_failed
        • odp_sql_execute_failed
        • odp_sql_query_slow
        • agentd_process_stop
        • mgragent_process_stop ocp_mgragent process stop
        • monagent_process_stop
        • ocp_contingency_failed
        • ob_host_invalid_disk_exists OBServer has a bad disk
        • ob_cluster_recyclebin_disk_used_over_threshold
        • ob_host_monitordb_disconnected OCP-Agent cannot connect to monitordb
        • upgrade_ocp_agent_failed
        • host_agent_version_not_same
        • ocp_collect_metric_failure_rate_high OCP-Server collects metrics with a high failure rate
        • ssl_certificate_is_expired SSL certificate expiration alert
        • message_hardware_error Host hardware failure
        • ob_license_expired
        • binlog_process_stop Stop a Binlog Server process
        • binlog_process_dead Binlog Server process does not exist
        • ocp_system_cpu_usage_over_threshold OCP Node CPU Usage Exceeds Threshold
        • ocp_disk_percent_over_threshold OCP Node Disk Usage Exceeds Threshold
        • ocp_jvm_heap_memory_used_percent_over OCP Node JVM Heap Memory Usage Exceeds Threshold
        • ocp_distributed_server_deleted_count OCP Node Offline
        • message_log_alarm System Message Logs
        • system_parameter_not_taken_effect System parameter modification requires a restart to take effect
        • host_process_cpu_bind_core_is_invalid CPU Binding Configuration Inconsistent
        • ob_server_stopped Server Stop Service
      • OAS alerts
        • os_cpu_irq_error Server CPU soft interrupt not scattered
        • os_tsar_cpu_sys_abnormal
        • os_observer_fd_usage OceanBase server has too many open handles
        • os_tsar_cpu_util_full
        • os_tsar_cpu_util_hwm
        • os_kernel_io_hang OceanBase server I/O Hangs
        • os_tsar_sda_ioawait OceanBase server high I/Oawait on disk SDA
        • os_tsar_nvme_ioawait OceanBase server node NVMe disk ioawait high
        • os_tsar_traffic_drop
        • os_tsar_traffic_error
        • os_observer_core_dump OceanBase server Core Dump
        • os_nic_1000m_full
        • os_nic_1000m_hwm
        • os_tsar_traffic_overload
        • node_file_root_usage High root directory usage on the server
        • node_file_inode_usage High inode usage on the server
        • os_kernel_ntp_down
        • os_kernel_ntp_delay
        • node_memory_peak
        • os_home_file_usage
        • node_file_data1_usage
        • node_file_datalog1_usage
        • sql_audit_collect_lost_percent_over_threshold
      • Appendix
        • Exception handling for OceanBase cluster compaction
        • Apply throttling to an OceanBase cluster
        • Network troubleshooting
        • Handling alert responses
    • API Reference
      • Overview
      • API call description
      • Rules for generating AK/SK signatures
      • Task return structure
      • Cluster management
        • Query the list of OceanBase clusters
        • Create an OceanBase cluster
        • Delete an OceanBase cluster
        • Stop an OceanBase cluster
        • Start an OceanBase cluster
        • Restart an OceanBase cluster
        • Upgrade an OceanBase cluster
        • Move out an OceanBase cluster
        • Perform a takeover precheck on an OceanBase cluster
        • Take over an OceanBase cluster
        • Query zones of an OceanBase cluster
        • Create a zone for an OceanBase cluster
        • Delete a zone from an OceanBase cluster
        • Stop a zone in an OceanBase cluster
        • Start a zone in an OceanBase cluster
        • Restart a zone in an OceanBase cluster
        • Add an OBServer node
        • Delete multiple OBServers at a time
        • Stop an OBServer node
        • Start an OBServer node
        • Restart an OBServer node
        • Replace an OBServer node
        • Change the password of an OceanBase cluster
        • Query the parameter metadata of OceanBase clusters
        • Query parameters of an OceanBase cluster
        • Modify parameters of an OceanBase cluster
        • Query OBServer nodes of an OceanBase cluster
        • Query OBServer nodes in a zone
        • Perform a switchover pre-check
        • Perform a failover pre-check
        • Perform a switchover
        • Perform a failover
        • Query resource statistics of an OceanBase cluster
        • Query resource statistics of all OBServer nodes in an OceanBase cluster
        • Query units of an OceanBase cluster
        • Create an arbitration service
        • Query details of an arbitration service
        • Query the list of arbitration services
        • Stop an arbitration service
        • Start an arbitration service
        • Restart an arbitration service
        • Upgrade an arbitration service
        • Delete an arbitration service
        • Query arbitration service parameters
        • Bind/Unbind tags to/from an arbitration service
        • Perform an arbitration service takeover precheck
        • Take over an arbitration service
        • Migrate an arbitration service
        • Perform a precheck on batch arbitration service replacement
        • Replace the arbitration service for multiple clusters
        • Perform an association precheck on multiple OceanBase clusters
        • Associate an arbitration service with multiple OceanBase clusters
        • Dissociate an arbitration service from multiple clusters
        • Create an arbitration service group
        • Update an arbitration service group
        • Query information of an arbitration service group
        • Query the list of arbitration service groups
        • Delete an arbitration service group
        • Upgrade an arbitration service group
        • Enable JVM Environment Dependency Service
        • Edit JVM Environment Dependency Service
        • Stop the JVM environment dependency service
      • Tenant management
        • Query tenants of a cluster
        • Query all tenants
        • Query details about a tenant
        • Create a tenant
        • Create a standby tenant
        • Delete a tenant
        • Lock a tenant
        • Unlock a tenant
        • Query units of a tenant
        • Delete a unit from a tenant
        • Add a replica for a tenant
        • Delete a replica of a tenant
        • Modify a replica of a tenant
        • Modify zone priorities of a tenant
        • Change the administrator password of a tenant
        • Modify the allowlist of a tenant
        • Query parameters of a tenant
        • Modify parameters of a tenant
        • Obtain a list of unit specifications
        • Create a resource unit specification
        • Delete a resource unit specification
        • Perform a switchover precheck
        • Routine Switchover
        • Perform a batch switchover precheck
        • Perform a batch switchover
        • Perform a failover precheck
        • Perform a failover
        • Perform a batch failover precheck
        • Perform a batch failover
      • OBProxy management
        • Create an OBProxy cluster
        • Delete an OBProxy cluster
        • Query OBProxy clusters
        • Query details about an OBProxy cluster
        • Update configurations of an OBProxy cluster
        • Add an OBProxy
        • Take over an OBProxy
        • Delete an OBProxy
        • Delete an OBProxy (not recommended)
        • Restart an OBProxy
        • Restart an OBProxy
        • Upgrade an OBProxy
        • Upgrade an OBProxy
        • Add a connectable OceanBase cluster to an OBProxy cluster
        • Remove a connectable OceanBase cluster from an OBProxy cluster
        • Query the description information of the OBProxy parameters
        • Query parameters of an OBProxy cluster
        • Stop an OBProxy
        • Start an OBProxy
      • Database management
        • Query databases
        • Create a database
        • Modify a database
        • Delete a database
        • Query the list of database users
        • Query database user details
        • Create a database user
        • Delete a database user
        • Change the password of a database user
        • Lock a database user
        • Unlock a database user
        • Query the list of database roles
        • Query database role details
        • Create a database role
        • Delete a database role
        • Query database objects
        • Grant global privileges to a user
        • Revoke global privileges of a user
        • Change global privileges of a user
        • Grant global privileges to a role
        • Revoke global privileges of a role
        • Change global privileges of a role
        • Grant roles to a user
        • Revoke roles of a user
        • Change roles of a user
        • Grant roles to a role
        • Revoke roles of a role
        • Change roles of a role
        • Grant database privileges to a user
        • Revoke database privileges of a user
        • Change database privileges of a user
        • Grant object privileges to a user
        • Revoke object privileges of a user
        • Change object privileges of a user
        • Grant object privileges to a role
        • Revoke object privileges of a role
        • Change object privileges of a role
      • Monitoring
        • Query the description of a monitoring metric
        • Query monitoring data
        • Query monitoring data by tag
      • Alerts
        • Call an alert API
        • Obtain current alerts
        • Obtain alert history
        • Query alert events
      • Inspection
        • Query all inspection tasks
        • Query inspection objects
        • View the details of an inspection report
        • Initiate an inspection
        • Query the last inspection result of an inspection item
        • Query the last inspection result of an inspection object
      • SQL performance
        • Query performance metrics of an SQL statement
        • Query the performance indicator trend of an SQL statement
        • Query SQL text
        • Query the performance indicator trend of an execution plan
        • Query the operator structure of an execution plan
        • Query the list of slow SQL statements
        • Query snapshots
        • Generate a performance report
        • Query a performance report
      • Backup and recovery
        • Query backup capabilities of a cluster
        • Create a backup strategy for a cluster
        • Modify the backup strategy of a cluster
        • Delete the backup strategy of a cluster
        • Query the backup strategy of a cluster
        • Query the backup overview of a cluster
        • Query data backup tasks of a cluster
        • Query log backup tasks of a cluster
        • Query recovery tasks of a cluster
        • Immediately back up a cluster
        • Parse cluster backup data
        • Start backup scheduling for a cluster
        • Stop backup scheduling for a cluster
        • Initiate tenant/database/table restore
        • Preview a restore task
        • Add restore resources
        • Clear added restore resources
        • Initiate a data backup for a tenant
        • Create a backup strategy for a tenant
        • Delete the backup strategy of a tenant
        • View the data backup tasks of a tenant
        • View the log backup tasks of a tenant
        • View restore tasks
        • Parse the backup information of a tenant
        • Query the backup strategy of a tenant
        • Modify the backup strategy of a tenant
        • Start backup scheduling for a tenant
        • Stop backup scheduling for a tenant
      • Host management
        • Query regions
        • Query details about a region
        • Add region information
        • Delete a region
        • Query IDCs
        • Query details about an IDC
        • Add IDC information
        • Delete an IDC
        • Query host types
        • Query details about a host type
        • Add host type information
        • Delete a host type
        • Query hosts
        • Query details about a host
        • Add multiple hosts at a time
        • Delete a host
        • Delete multiple hosts at a time
      • Software packages
        • Query software packages
        • Upload a software package
        • Delete a software package
      • O&M tasks management
        • Query tasks
        • Query details about a task
        • Retry a task
        • Roll back a task
        • Query subtask logs
        • Retry a subtask
        • Skip a subtask
        • Cancel a subtask
      • System management
        • Health examination
          • Query the basic information of an OCP application
          • Query OCP server time
          • Query OCP application status
        • Operation Audit
          • Query historical events
        • Agent management
          • Query OCP Agent details on a host
          • Stop the OCP Agent process on a host
          • Batch stop the OCP Agent processes on hosts
          • Restart the OCP Agent process on a host
          • Batch restart the OCP Agent processes on hosts
          • Query OCP Agent processes on a host
          • Restart the OCP Agent process on a host
          • Stop the OCP Agent process on a host
    • Metric reference
      • Overview of metrics
      • Monitoring metrics list
      • OceanBase cluster
        • Database performance
          • QPS
          • Query response time
          • TPS
          • Transaction response time
          • Number of sessions
          • Request queue time
          • Number of transaction logs
          • Transaction log volume
          • Time consumed by transaction logs
          • IOPS
          • IO time-consuming
          • I/O Throughput
          • TPS
        • OBServer performance
          • Process memory
          • Process CPU utilization
          • Process file descriptors
          • Number of process threads
          • sys500 memory occupation
          • Error logs
      • OceanBase Database tenant
        • Performance and SQL
          • QPS
          • Response time (SQL mode)
          • SQL execution plan category
          • SQL execution plan time
          • Sessions
          • Wait events
          • Metrics related to time consumption of wait events
          • Request waiting queue
          • Request waiting queue time consuming
          • Request queue size
          • Tenant CPU cost
          • Tenant thread usage
          • memroy usage pecent
          • MemStore usage
          • Rpc package rt
          • RPC packet throughput
          • Cursors
          • PX worker thread usage
          • Clog synchronization delay
          • DB time metrics
          • SQL execution phase
          • Frontend workload
          • Background workload metrics
          • RPC Request Success Rate
          • Number of GTS Requests
          • RPC Network Latency
          • RPC Delivery Failure
        • Transaction
          • TPS
          • Transaction response time
          • Transaction response time details
          • Transaction Rollback Ratio
          • Number of transaction logs
          • Transaction log volume
          • Time consumed by transaction logs
          • Lock waits
          • Time consumed by lock waits
          • TPS
          • Transaction table read request hits
          • Partition
          • XA Transactions
          • XA Statement Count
          • Average execution duration of XA statements
          • MemStore Lock Request Success Rate
        • Storage and Cache
          • MemStore
          • IOPS
          • IO time-consuming
          • I/O Throughput
          • Cache size
          • Cache hit rates
          • Number of cache requests
          • Vector Index Data Size
          • Actual Usage Percentage of Vector Index Data
          • Frozen MEMStore
          • Log disk
          • Data disk
          • Minor compaction partitions
        • Database objects
          • Objects
        • OBKV_Table
          • QPS (OBKV-Table)
          • Response time (OBKV-Table)
          • Average number of statement lines processed (OBKV-Table)
        • OBKV_HBase
          • QPS (OBKV_Hbase)
          • Response time (OBKV-HBase)
          • Average number of statement lines processed (OBKV-HBase)
        • OBKV_Redis
          • QPS (OBKV-Redis)
          • Response time (OBKV-Redis)
      • Binlog Service
        • Subscription Connection Monitoring
          • Sending Delay
          • Associate RPS
          • Network Traffic
        • Binlog Performance Monitoring
          • Binlog Delay
          • Binlog RPS
        • Binlog Resource Monitoring
          • CPU
          • memory used
          • memory
          • disk used
          • Binlog Disk Write Rate
          • disk ratio
          • FD count
          • network bytes
      • OBProxy cluster
        • TPS
        • QPS
        • Client connections
        • Server connections
        • Average response time for each SQL statement
        • Memory for the obproxy process
        • OBProxy CPU usage
        • Number of file descriptors for the obproxy process
        • Number of threads in the obproxy process
        • Log error
        • Route table queries
        • Net bytes
        • RPC sessions
        • RPC requests
        • RPC request time consumption
      • Host
        • Host Performance
          • Linux system load
          • CPU Utilization
          • I/O usage
          • I/O queue length
          • IOPS
          • Time consumed by I/O operations
          • I/O throughput
          • Network throughput
          • TCP retransmission rate
          • Packet forwarding
          • NTP clock offset
          • Inode usage
        • Host Resources
          • Memory
          • Memory usage
          • Disk
        • Host Processes
          • Process resident memory
          • Process CPU utilization
          • Number of process file descriptors
          • Number of process threads
          • Number of OCP-Agent process goroutines
    • Information Collection Reference
      • Major Compaction Exceptions
        • Collect information about the major compaction status of zones of a cluster
        • Collect information about the ongoing major compaction in a cluster
        • Collect suggestions provided based on historical major compactions
        • Collect diagnostic information about major compactions
        • Collect information about DAG warnings in OceanBase Database
        • Collect RootService task records
        • Collect the last-one-day records of major compaction events scheduled by RootService
        • Collect the checksum information about tablets
        • Collect the checksum information about columns
        • Collect major compaction parameter settings
        • Collect the major compaction time
      • OCP Agent Exceptions
        • Collect panic logs of the mgragent process
        • Collect panic logs of the monagent process
        • Collect information about goroutines of the agent processes
      • Cluster Exceptions
        • Collect information about bad disks
        • Collect information about OBServer nodes in a cluster
        • Collect obstack information on a cluster node
        • Collect information about the core dump file of the observer process
        • Collect host logs containing the CRASH ERROR keyword
        • Collect connectivity information of the sys tenant
      • CPU Exceptions
        • Collect information about processes with high CPU utilization on a cluster node
        • Collect information about threads with high CPU utilization in an observer process
      • Data Disk Full
        • Collect the data disk usage information of nodes in a cluster
        • Collect incremental data generated during cluster compactions
        • Collect information about the disk space occupied by temporary files of a tenant
        • Collect information about sizes of data of different versions in major SSTables
        • Collect information about the macroblock utilization of nodes
      • Memory Exceptions
        • Collect information about modules with highest memory usage
        • Collect memory allocation sampling data of OBServer nodes
        • Collect KV cache information of a tenant
        • Collect memory leakage detection information
        • Collect MemStore information of a tenant
      • Host Exceptions
        • Collect logs from the /var/log/messages directory of a host
        • Collect host information by running the df -h command
      • Other Tenants Exceptions
        • Collect host logs containing the dump tenant info keyword
        • Collect host logs containing the dump tenant disk usage keyword
        • Collect host logs containing the dump tenant info keyword
    • Error codes reference
      • OCP error codes
      • OBServer error codes
        • MySQL mode
          • Overview
          • 0001 to 3999
          • 4000 to 4499
          • 4500 to 4999
          • 5000 to 5999
          • 6000 to 6999
          • 7000 to 7999
          • 8000 to 8999
          • 9000 to 9499
          • 9500 to 9999
          • 10000 to 12000
          • 22998, 30926, 38104, and 38105
        • Oracle mode
          • Overview
          • OBE-00000 to OBE-00999
          • OBE-01000 to OBE-01499
          • OBE-01500 to OBE-01999
          • OBE-02000 to OBE-04999
          • OBE-05000 to OBE-10000
          • OBE-10000 to OBE-19999
          • OBE-20000 to OBE-29999
          • OBE-30000 to OBE-49999
          • OBE-50000 to OBE-99999
          • PLS-00000 to PLS-00999
  • FAQ
    • FAQ about deployment
    • FAQ on upgrade
    • FAQ on O&M
      • FAQ on accounts and passwords
      • FAQ on host management
      • FAQ about OceanBase clusters
      • FAQ about OceanBase tenants
      • FAQ on OBProxy
      • FAQ on the OCP software package
      • FAQ on backup and recovery
    • FAQ on monitoring
      • FAQ on monitoring metrics
      • FAQ on SQL monitoring
      • FAQ about resource usage
      • Use OCP-Agent to pull time-series monitoring data
    • FAQ on alerts
    • FAQ on the OCP system
    • OCP multi-cluster FAQ
  • Appendix
    • OCP background tasks
    • Tables managed by the daemon
    • Component listening port list
    • Processes
    • Install and configure OCI
    • Modify the log stream downgrade control time
    • AWS S3 protocol
    • Grafana dashboard
    • Configure cgroup
    • Create a Slack channel and obtain its webhook URL
    • Enable HTTPS Access for Prometheus in OCP
  • Release Notes
    • Version number guidelines
    • V4.4
      • OCP V4.4.2
      • OCP V4.4.1
      • OCP V4.4.0
    • V4.3
      • OCP V4.3.6
      • OCP V4.3.5
      • OCP V4.3.4
      • OCP V4.3.3
      • OCP V4.3.2
      • OCP V4.3.1
      • OCP V4.3.0
    • V4.2
      • OCP V4.2.2
      • OCP V4.2.1
      • OCP V4.2.0
    • V4.1
      • OCP V4.1.0
    • V4.0
      • OCP V4.0.3
      • OCP V4.0.2
      • OCP V4.0.1
      • OCP V4.0.0
    • V3.3
      • OCP V3.3.5
      • OCP V3.3.4
      • OCP V3.3.3
      • OCP V3.3.1
      • OCP V3.3.0
    • V3.2
      • OCP V3.2.3
    • V3.1
      • OCP V3.1.2

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  5. V4.4.2

refresh_location_cache_failed_by_metric

Last Updated:2026-09-03 07:51:01

For more information about this alert, see Refresh OBServer location cache failed.

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