This topic describes the performance metric number of transaction logs in an OceanBase cluster. You can specify a statistical period to query the number of transaction logs in a single zone or on a single OBServer of an OceanBase cluster.
Number of transaction logs
Definition
The number of transaction logs committed per second.
Description
| Metric | Metric field name | Unit |
|---|---|---|
| - | trans_commit_log_count | times/s |
Calculation expression
sum(rate(ob_sysstat{stat_id="30002",@LABELS}[@INTERVAL])) by (@GBLABELS)
SQL statements for metric collection
If you use OceanBase Database of a version earlier than V4.0, execute the following statement:
select /*+ MONITOR_AGENT READ_CONSISTENCY(WEAK) */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (30002) and (con_id > 1000 or con_id = 1) and class < 1000If you use OceanBase Database V4.0 or later, execute the following statement:
select /* MONITOR_AGENT */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (30002) and (con_id > 1000 or con_id = 1) and class < 1000
