This topic describes monitoring metrics related to the I/O Throughput within an OceanBase Database tenant. You can specify a statistical period to query the I/O Throughput statistics in a single zone or on a single OBServer of an OceanBase Database tenant.
ssstore_read
Definition
The amount of data read from SSStores in a tenant per second in the specified statistical period.
Description
| Metric | Metric field name | Unit |
|---|---|---|
| ssstore_read | io_read_size | Byte |
Calculation expression
sum(rate(ob_sysstat{stat_id="60002",@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$sysstat where stat_id IN (60002) and (con_id > 1000 or con_id = 1) and class < 1000If you use OceanBase Database V4.0 or later, execute the following statement:
select /* MONITOR_AGENT */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (60002) and (con_id > 1000 or con_id = 1) and class < 1000
ssstore_write
Definition
The amount of data written to SSStores in a tenant per second in the specified statistical period.
Description
| Metric | Metric field name | Unit |
|---|---|---|
| ssstore_write | io_write_size | MiB |
Calculation expression
sum(rate(ob_sysstat{stat_id="60005",@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$sysstat where stat_id IN (60005) and (con_id > 1000 or con_id = 1) and class < 1000If you use OceanBase Database V4.0 or later, execute the following statement:
select /* MONITOR_AGENT */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (60005) and (con_id > 1000 or con_id = 1) and class < 1000
clog_read
Definition
The amount of clog reads in a tenant per second in the specified statistical period.
Description
| Metric | Metric field name | Unit |
|---|---|---|
| clog_read | clog_io_read_size | Byte |
Calculation expression
sum(rate(ob_sysstat{stat_id="80008",@LABELS}[@INTERVAL])) by (@GBLABELS)
SQL statements for metric collection
If you use OceanBase Database V4.0 or later, execute the following statement:
select /* MONITOR_AGENT */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (80008) and (con_id > 1000 or con_id = 1) and class < 1000
clog_write
Definition
The number of clog writes in a tenant per second in the specified statistical period.
Description
| Metric | Metric field name | Unit |
|---|---|---|
| clog_write | clog_io_write_size | MiB |
Calculation expression
sum(rate(ob_sysstat{stat_id="80002",@LABELS}[@INTERVAL])) by (@GBLABELS)
SQL statements for metric collection
If you use OceanBase Database V4.0 or later, execute the following statement:
select /* MONITOR_AGENT */ con_id tenant_id, stat_id, value from v$sysstat where stat_id IN (80002) and (con_id > 1000 or con_id = 1) and class < 1000
