OpenTelemetry Metrics

Postgres

Metric	Update frequency	Unit	Type	Description
`db.client.activity.count`	continuous	`1`	gauge
`db.client.blks.hit`	continuous	`1`	counter
`db.client.blks.read`	continuous	`1`	counter
`db.client.delete.total`	continuous	`{request}`	counter	Total number of rows deleted from PostgreSQL
`db.client.error.total`	continuous	`1`	counter	Total number of PostgreSQL errors
`db.client.insert.total`	continuous	`{request}`	counter	Total number of rows inserted in PostgreSQL
`db.client.replication.flush.lag.bytes`	continuous	`By`	gauge	Number of bytes standby lags behind primary in flush phase
`db.client.replication.flush.lag.ms`	continuous	`ms`	gauge	Number of seconds standby lags behind primary in flush phase
`db.client.replication.pending.lag.bytes`	continuous	`By`	gauge	Number of bytes standby lags behind primary in pending phase
`db.client.replication.replay.lag.bytes`	continuous	`By`	gauge	Number of bytes standby lags behind primary in replay phase
`db.client.replication.replay.lag.ms`	continuous	`ms`	gauge	Number of seconds standby lags behind primary in replay phase
`db.client.replication.total.lag.bytes`	continuous	`By`	gauge	Number of bytes standby lags behind primary in total
`db.client.replication.total.lag.ms`	continuous	`ms`	gauge	Number of seconds standby lags behind primary in total
`db.client.replication.write.lag.bytes`	continuous	`By`	gauge	Number of bytes standby lags behind primary in write phase
`db.client.replication.write.lag.ms`	continuous	`ms`	gauge	Number of seconds standby lags behind primary in write phase
`db.client.request.total`	continuous	`{request}`	counter	Total number of PostgreSQL requests
`db.client.requests.duration.sum`	continuous	`ms`	counter	Requests duration sum
`db.client.requests.duration.total`	continuous	`ms`	counter	Requests duration total
`db.client.tuples.fetch`	continuous	`1`	counter	Total number of tuples fetched from PostgreSQL
`db.client.tuples.return`	continuous	`1`	counter	Total number of tuples returned from PostgreSQL
`db.client.update.total`	continuous	`{request}`	counter	Total number of rows updated in PostgreSQL
`db.sql.cluster.size`	continuous	`By`	gauge	Cluster size
`db.client.calls.total`	every minute	`{request}`	counter	Total calls
`db.client.execution.time.mean`	every minute	`ms`	gauge	Mean exec time
`db.client.execution.time.stddev`	every minute	`ms`	gauge	stddev exec time
`db.sql.table.index.scan`	every minute	`1`	counter	Number of index scans on a table
`db.sql.table.seq.scan`	every minute	`1`	counter	Number of sequential scans on a table
`db.size`	every hour	`By`	gauge	Database size
`db.sql.connection.max`	every hour	`{connection}`	gauge	max_connections
`db.sql.table.size`	every hour	`By`	gauge	Table size

JVM

Metric	Update frequency	Unit	Type	Description
`jvm.cpu.recent_utilization`	continuous	`1`	histogam	Recent CPU utilization for the whole system as reported by the JVM
`jvm.gc.count`	continuous	`{count}`	gauge	The total number of collections that have occurred
`jvm.gc.duration`	continuous	`s`	histogram	The approximate accumulated collection elapsed time
`jvm.memory.used`	continuous	`By`	gauge	The current memory usage of non-heap memory that is used by the JVM
`jvm.memory.used`	continuous	`By`	gauge	The current memory usage of the heap that is used for object allocation
`jvm.system.cpu.utilization`	continuous	`1`	histogam	Recent CPU utilization for the whole system as reported by the JVM
`jvm.thread.by.state.count`	continuous	`{thread}`	gauge	Number of executing platform threads by state
`jvm.thread.count`	continuous	`{thread}`	gauge	The current number of live threads
`jvm.thread.daemon.count`	continuous	`{thread}`	gauge	The current number of live daemon threads
`jvm.thread.peak.count`	continuous	`{thread}`	gauge	The peak live thread count
`system.memory.utilization`	continuous	`1`	gauge
`jvm.core.pool.size`	every hour	`{thread}`	gauge	The core number of threads in the pool
`jvm.memory.size.max`	every hour	`By`	gauge	The maximum amount of memory that the JVM will attempt to use
`jvm.memory.size.total`	every hour	`By`	gauge	The total amount of memory in the JVM
`jvm.pool.size.max`	every hour	`{thread}`	gauge	The maximum number of threads allowed
`jvm.processor.available.count`	every hour	`1`	gauge	The maximum number of processors available

HTTP

Metric	Update frequency	Unit	Type	Description
`http.server.active_requests`	continuous	`{request}`	gauge	Number of concurrent HTTP requests
`http.server.completed`	continuous	`{request}`	counter	Number HTTP requests completed
`http.server.queue`	continuous	`{request}`	gauge	Number HTTP requests in the queue
`http.server.request.created`	continuous	`s`	histogram
`http.server.request.duration`	continuous	`s`	histogram
`http.server.request.used`	continuous	`s`	histogram
`http.server.request.wait`	continuous	`s`	histogram

Hikari (Postgres connection pool)

Metric	Update frequency	Unit	Type	Description
`db.client.connection.closed.total`	continuous	`{connection}`	counter
`db.client.connection.count`	continuous	`{connection}`	gauge	The number of active connections
`db.client.connection.create_time`	continuous	`s`	histogram	The time it took to create a new connection
`db.client.connection.idle.max`	continuous	`{connection}`	gauge	The number of idle connections allowed
`db.client.connection.max`	continuous	`{connection}`	counter
`db.client.connection.timeouts`	continuous	`{timeout}`	counter
`db.client.connection.use_time`	continuous	`s`	histogram	The time between borrowing a connection and returning it to the pool
`db.client.connection.wait_time`	continuous	`s`	histogram	The time it took to obtain an open connection from the pool
`db.client.connection.max`	every hour	`{connection}`	gauge	The maximum number of open connections allowed

PreviousTechnical reference

NextOTEL metrics exporter parameters

Last updated 2025-05-06T09:17:20Z