Note
This parameter is available starting with V1.4.
Description
bf_cache_miss_count_threshold specifies the threshold for triggering BloomFilter Cache. When the number of macroblock misses reaches this threshold, a BloomFilter cache is created.
Privilege requirements
Query the parameter
The
systenant and all user tenants can use theSHOW PARAMETERSstatement to query this parameter.Modify the parameter
Only the
systenant can modify this parameter. User tenants cannot modify this parameter.
Attributes
Attribute |
Description |
|---|---|
| Type | Int |
| Default value | 100 |
| Value range | [0, +∞) When the value is 0, BloomFilter cache creation is disabled. |
| Modifiable | Yes. You can use the ALTER SYSTEM SET statement to modify the parameter. |
| Effective upon OBServer node restart | No. The setting takes effect immediately. |
Examples
Create a BloomFilter cache when the number of macroblock misses reaches 100.
obclient> ALTER SYSTEM SET bf_cache_miss_count_threshold=100;