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**To list the metrics that can be queried for a metric type on a DB instance** The following ``list-available-resource-metrics`` example lists the ``db.load`` metrics you can query for the database ``db-abcdefg123456789``. :: aws pi list-available-resource-metrics \ --service-type RDS \ --identifier db-abcdefg123456789 \ --metric-types "os" "db" Output:: { "Metrics": [ { "Description": "The number of virtual CPUs for the DB instance", "Metric": "os.general.numVCPUs", "Unit": "vCPUs" }, ......, { "Description": "Time spent reading data file blocks by backends in this instance", "Metric": "db.IO.read_latency", "Unit": "Milliseconds per block" }, ...... ] } For more information about metrics in Performance Insights, see `Database load <https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_PerfInsights.Overview.ActiveSessions.html>`__ in the *Amazon RDS User Guide* and `Database load <https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/USER_PerfInsights.Overview.ActiveSessions.html>`__ in the *Amazon Aurora User Guide*.