Monitor the performance of databases in an instance

This topic describes how to monitor the performance of databases in an instance by using OceanBase Cloud.

Procedure

1. Log in to the OceanBase Cloud console.

2. In the left-side navigation pane, click Instances.

3. On the Instances page, click the name of the target instance to go to the Overview page of the instance.

4. In the left-side navigation pane of the Overview page of the instance, click Metrics.

5. The Databases tab automatically appears.

6. By default, this tab shows the monitoring data of all databases in the instance in the last hour.

   • You can select a tenant from the Tenant drop-down list to view its monitoring data. If you select multiple tenants, you can click tenant names in a chart to filter the data to view.
   • You can also specify a time period to filter the data to view.

   The following table describes the performance metrics.

   • SQL

     Metric	English Name	Unit	Description
     QPS	sql_all_count	times/s	The number of SQL statements processed per second.
     SQL Response Time	sql_all_rt	ms	The average response time of SQL statements.
     Single Operation Per Second	single_kv_all_count	times/s	The average number of operations processed per second for single operations.
     Single Operation Average Time	single_kv_all_rt	μs	The average time consumed for single operations.
     Multi-Operation Average Per Second	multi_kv_all_count	times/s	The average number of operations processed per second for multi-operations of the same type.
     Multi-Operation Average Time	multi_kv_all_rt	ms	The average time consumed for multi-operations of the same type.
     TABLE Operation P99 Response Time	kv_table_all_rt_p99	ms	The P99 response time of TABLE operations.
     Multi-Operation Average Rows	multi_kv_all_row	count	The average number of rows processed for multi-operations of the same type.
     Batch Operation Average Per Second	batch_kv_all_count	times/s	The average number of operations processed per second for batch operations.
     Batch Operation Average Time	batch_kv_all_rt	ms	The average time consumed for batch operations.
     Batch Operation Average Rows	batch_kv_all_row	count	The average number of rows processed for batch operations.
     Query Average Per Second	query_kv_select_count	times/s	The average number of queries processed per second.
     Query Average Time	query_kv_select_rt	ms	The average response time of queries.
     Query Average Rows	query_kv_select_row	count	The average number of rows processed for queries.
     Query and Modify Average Per Second	query_and_muate_kv_select_count	count	The average number of queries processed per second for query and modify operations.
     Query and Modify Average Time	query_and_muate_kv_select_rt	μs	The average response time of query and modify operations.
     Query and Modify Average Rows	query_and_muate_kv_select_row	count	The average number of rows processed for query and modify operations.
     HBase Operation Count	hbase_all_count	count	The total number of HBase operations.
     HBase Operation Time	hbase_rt	μs	The total time consumed for HBase operations.
     HBase Operation P999 Response Time	kv_hbase_all_rt_p999	ms	The P999 response time of HBase operations.
     HBase Operation Rows	hbase_all_rows	count	The total number of rows processed for HBase operations.
     IOPS	io_count	times/s	The number of I/O operations processed per second by SSStore.
     I/O Time	io_rt	ms	The time consumed for I/O operations.
     I/O Throughput	io_size	byte	The data volume processed by SSStore per second.
     Wait Events	ob_waitevent_count	count	The number of wait events in a specific database state.
     Execution Events	ob_sql_event	count	The number of execution events in a specific database state.
     Sessions	all_session	count	The number of current sessions.

   • Transactions

     Metric	English Name	Unit	Description
     TPS	transaction_count	times/s	The number of transactions processed per second.
     Transaction Response Time	transaction_rt	ms	The average response time of a transaction.
     Request Queue Time	request_queue_time	μs	The time consumed for an SQL request to wait in the queue.
     Transaction Log Count	trans_commit_log_count	times/s	The number of transaction logs committed per second.
     Transaction Log Size	clog_trans_log_total_size	byte	The size of transaction logs committed per second.
     Transaction Count	transaction_partition_count	times/s	The number of transactions processed per second.
     Transaction Log Network Sync Time	trans_commit_log_sync_rt	μs	The average time consumed for network synchronization of a transaction log.

   • Database status

     Metric	English Name	Unit	Description
     Database Working Time	ob_worktime	s	The total working time of the database.
     Database Non-idle Waiting Time	ob_no_idle_waiting_time	ms	The total non-idle waiting time of the database.

   • Disk

     Metric	English name	Unit	Description
     Log disk total size	ob_tenant_log_disk_total_bytes	GiB	Log disk total size
     Log disk used size	ob_tenant_log_disk_used_bytes	GiB	Log disk used size
     Data size	ob_tenant_server_required_size	GiB	Data size
     Data volume	ob_tenant_server_data_size	GiB	Data volume
     Binlog disk used size	ob_tenant_binlog_disk_used	GiB	Binlog disk used size

   • Cache

     Metric	English name	Unit	Description
     Shared storage cache allocated size	ss_cache_assigned_size	byte	Shared storage cache allocated size Note This metric is displayed only for shared storage instances.
     Shared storage cache used size	ss_cache_used_size	byte	Shared storage cache used size Note This metric is displayed only for shared storage instances.