This topic describes the metrics and their corresponding indicators of ApsaraDB for MongoDB sharded cluster instances.
When you call an API operation provided by CloudMonitor, set the Namespace and Period parameters.
- Set the Namespace parameter to acs_mongodb.
- Set the Period parameter to an integral multiple of 60s. The default value is 60s.
The following table describes the valid values of the MetricName and Dimensions parameters.
| Metric in alert rules | Indicator | Unit | MetricName | Dimensions | Statistics |
|---|---|---|---|---|---|
| Number of command operations | command | Count/s | ShardingOpCommand | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of delete operations | delete | Count/s | ShardingOpDelete | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Disk size occupied by logs | log_size | Bytes | ShardingLogDiskAmount | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Memory usage | mem_usage | % | ShardingMemoryUtilization | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of requests | num_requests | Count | ShardingNumberRequests | userId, instanceId, subinstanceId, and role | Average |
| IOPS usage | iops_usage | % | ShardingIOPSUtilization | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Internal inbound traffic | bytes_in | Bytes | ShardingIntranetIn | userId, instanceId, subinstanceId, and role | Average |
| Internal outbound traffic | bytes_out | Bytes | ShardingIntranetOut | userId, instanceId, subinstanceId, and role | Average |
| Disk size occupied by data | data_size | Bytes | ShardingDataDiskAmount | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| CPU utilization | cpu_usage | % | ShardingCPUUtilization | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of connections | current_conn | Count | ShardingConnectionAmount | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Connection usage | conn_usage | % | ShardingConnectionUtilization | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Disk size occupied by instances | ins_size | Bytes | ShardingInstanceDiskAmount | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Disk usage | disk_usage | % | ShardingDiskUtilization | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of getMore operations | getmore | Count/s | ShardingOpGetmore | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of insert operations on shard nodes | insert | Count/s | ShardingOpInsert | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of query operations | query | Count/s | ShardingOpQuery | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Number of update operations | update | Count/s | ShardingOpUpdate | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Queries per second (QPS) | insert+delete+update+query+getmore+command | Count/s | ShardingQPS | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |
| Replication lag | repl_lag | Seconds | ShardingReplicationLag | userId, instanceId, subinstanceId, and role | Average, Maximum, and Minimum |