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ddm_03_0051.html
Metrics
Description
This section describes metrics reported by DDM to Cloud Eye, metric namespaces, and dimensions. You can use APIs provided by Cloud Eye to query the metric information generated for DDM.
Namespace
SYS.DDMS
Note
SYS.DDM is the namespace of DDM 1.0.
SYS.DDMS is the namespace of DDM 2.0.
DDM has been upgraded to version 2.0. The namespace is still SYS.DDM for existing users of DDM1.0.
Metrics
| Metric ID | Metric Name | Description | Value Range | Monitored Object | Monitoring Interval (Raw Data) |
|---|---|---|---|---|---|
| ddm_cpu_util | CPU Usage | CPU usage of the DDM instance node | 0—100 | DDM nodes | 1 minute |
| ddm_mem_util | Memory Usage | Memory usage of the DDM instance node. | 0—100 | DDM nodes | 1 minute |
| ddm_bytes_in | Network Input Throughput | Incoming traffic per second of the DDM instance node | >= 0 | DDM nodes | 1 minute |
| ddm_bytes_out | Network Output Throughput | Outgoing traffic per second of the DDM instance node | >= 0 | DDM nodes | 1 minute |
| ddm_qps | QPS | Requests per second of the DDM instance node | >= 0 | DDM nodes | 1 minute |
| ddm_read_count | Reads | Read operations of the DDM instance node within each monitoring period | >= 0 | DDM nodes | 1 minute |
| ddm_write_count | Writes | Write operations of the DDM instance node within a monitoring period | >= 0 | DDM nodes | 1 minute |
| ddm_slow_log | Slow SQL Logs | Slow SQL logs of DDM-Core | >= 0 | DDM nodes | 1 minute |
| ddm_rt_avg | Average Response Latency | Average response latency of DDM-Core | >= 0 | DDM nodes | 1 minute |
| ddm_connections | Connections | Connections of DDM-Core | >= 0 | DDM nodes | 1 minute |
| ddm_backend_connection_ratio | Percentage of Active Connections | Percentage of active connections (from a DDM node to the target RDS instance) | 0—100 | DDM nodes | 1 minute |
| active_connections | Active connections | Active connections of each DDM instance node | >= 0 | DDM nodes | 1 minute |
| ddm_connection_util | Connection Usage | Percentage of active connections to each DDM instance node | 0-100% | DDM nodes | 1 minute |
Dimensions
| Key | Value |
|---|---|
| node_id | DDM nodes |
Note
DDM supports dimension node_id, but not dimension instance_id. You can obtain the ID of a node by the corresponding instance ID.