Metrics reference

Full list of metrics exposed by the Managed Postgres Prometheus endpoint

This page lists every metric exposed by the Managed Postgres Prometheus endpoint. For setup and authentication, see the Prometheus endpoint page.

Common labels

Every metric carries the following labels:

Label	Description
clickhouse_org	Organization ID
postgres_service	Postgres service ID
postgres_service_name	Postgres service name

Some metrics add a label for the dimension they break out (e.g. mode on CPU metrics, state on connections, database on database size). Those are listed alongside each metric.

Information metric

PostgresServiceInfo is a gauge that always equals 1 and carries the service’s current status and version on its labels. Use it to join status onto other metrics or to alert on a service leaving the running state.

Metric	Type	Extra labels	Description
PostgresServiceInfo	gauge	postgres_status, postgres_version	One series per service; value is always 1.

postgres_status reports the current lifecycle state of the service (for example running, creating, stopped). postgres_version reports the major Postgres version (e.g. 17, 18).

Capacity

Static limits provisioned for the service. These change only when the service is resized.

Metric	Type	Unit	Description
PostgresServer_CPUCores	gauge	cores	CPU cores allocated to the service.
PostgresServer_MemoryLimitBytes	gauge	bytes	Memory allocated to the service.
PostgresServer_StorageLimitBytes	gauge	bytes	Storage allocated to the service.

Resource utilization

Metric	Type	Extra labels	Description
PostgresServer_CPUSeconds_Total	counter	mode	CPU time consumed, broken out by mode: user, system, iowait, softirq, steal, irq, nice, idle.
PostgresServer_MemoryUsedPercent	gauge		Memory in use, as a percentage of PostgresServer_MemoryLimitBytes.
PostgresServer_MemoryCachePercent	gauge		Memory used by cache and buffers, as a percentage of total memory.
PostgresServer_FilesystemUsedPercent	gauge		Filesystem space used, as a percentage of total storage.

To compute CPU usage as a percentage, take the rate of PostgresServer_CPUSeconds_Total over the modes you care about and divide by PostgresServer_CPUCores.

Disk and network I/O

Metric	Type	Unit	Description
PostgresServer_DiskReads_Total	counter	ops	Disk read operations completed.
PostgresServer_DiskWrites_Total	counter	ops	Disk write operations completed.
PostgresServer_NetworkReceiveBytes_Total	counter	bytes	Bytes received over the network.
PostgresServer_NetworkTransmitBytes_Total	counter	bytes	Bytes transmitted over the network.

Database activity

Cumulative counters since service start. Use rate() or irate() to turn them into per-second values.

Metric	Type	Description
PostgresServer_TuplesFetched_Total	counter	Rows fetched by queries.
PostgresServer_TuplesInserted_Total	counter	Rows inserted.
PostgresServer_TuplesUpdated_Total	counter	Rows updated.
PostgresServer_TuplesDeleted_Total	counter	Rows deleted.
PostgresServer_TransactionsCommitted_Total	counter	Transactions committed.
PostgresServer_TransactionsRolledBack_Total	counter	Transactions rolled back.
PostgresServer_Deadlocks_Total	counter	Deadlocks detected.

Connections, cache, and database size

Metric	Type	Extra labels	Description
PostgresServer_ActiveConnections	gauge	state	Connections by state (e.g. active, idle).
PostgresServer_CacheHitRatio	gauge		Buffer cache hit ratio: blocks served from cache vs. total blocks accessed, as a percentage.
PostgresServer_DatabaseSizeBytes	gauge	database	Disk size of each database, in bytes. Includes the postgres default and any user-created databases.

Related pages

• Prometheus endpoint — setup, authentication, and scraping
• Dashboard — built-in cloud console charts
• OpenAPI guide — API key creation and lookup of organization and service IDs