max_syslog_file_count

Description

max_syslog_file_count specifies the maximum number of log files that can be retained before they are recycled.

Attributes

Considerations

• The total number of all types of logs cannot exceed max_syslog_file_count. The oldest log files are recycled based on the FIFO (First In, First Out) strategy. The FIFO strategy selects the time of the last modification of a log file as the time node for log file recycling. For example, the log file xxxxxxxx.log.20231123223441234 is sorted based on the ending time to determine the order of recycling.

• The number of log files is limited by max_syslog_file_count. The total number of xxxxxx.log.xxxxx files after rotation cannot exceed max_syslog_file_count, and the total number of xxxxxx.log.wf.xxxxx files after rotation also cannot exceed max_syslog_file_count. Note that the active log files (such as observer.log and rootservice.log) and their corresponding WF files are not counted in this limit.

• If the generation speed of trace logs is too fast and the number of trace logs is too large, the space occupied by trace logs may exceed the space occupied by OBServer log files. In this case, OBServer log files may be recycled earlier. To avoid this situation, we recommend that you adjust the trace log level to control the number of trace logs. For more information, see Trace log level.

• The relationship between the max_syslog_file_count parameter and the syslog_disk_size parameter is as follows:

  1. max_syslog_file_count=0 and syslog_disk_size=0: No log files are recycled until the disk is full.
  2. max_syslog_file_count=0 and syslog_disk_size>0: When the total size of all log files approaches syslog_disk_size, the oldest log files are recycled.
  3. max_syslog_file_count>0 and syslog_disk_size=0: When the number of log files of a certain type exceeds max_syslog_file_count, the oldest log files are recycled.
  4. max_syslog_file_count>0 and syslog_disk_size>0: When the number of log files of a certain type exceeds max_syslog_file_count or when the total size of all log files approaches syslog_disk_size, the oldest log files are recycled.

Examples

Set the maximum number of log files that can be retained before they are recycled to 20.

obclient> ALTER SYSTEM SET max_syslog_file_count=20;

References

• Log files

• ob_esi_max_syslog_file_count