Metrics

Updated on 2022-09-16 GMT+08:00

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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

**Table 1** DDM 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.

Parent topic: Monitoring Management

Previous topic: Monitoring Management

Next topic: Viewing Metrics

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