This topic describes the monitoring metric Cursors within an OceanBase Database tenant. You can specify a statistical range to query statistics about the number of opened cursors cached in the sessions of a single zone or on a single OBServer of a tenant.
Definition
The number of opened cursors cached in sessions in the specified statistical range.
Description
| Metric | Metric name | Unit |
|---|---|---|
| opened_cursors | opened_cursors_count | N/A |
Calculation expression
sum(delta(ob_sysstat{stat_id="40030",@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$sysstat where stat_id IN (40030) and (con_id > 1000 or con_id = 1) and class < 1000If you use OceanBase Database V4.0 or later, execute the following statement:
select /* MONITOR_AGENT */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (40030) and (con_id > 1000 or con_id = 1) and class < 1000
