Yandex Monitoring metric reference

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Updated at April 28, 2025

CPU metrics
Disk metrics
Disk I/O metrics
RAM metrics
Network metrics
Service metrics

This section describes Managed Service for PostgreSQL metrics delivered to Monitoring.

The name label stores the metric name.

Labels shared by all Managed Service for PostgreSQL metrics:

Label	Value
service	Service ID: `managed-postgresql`
resource_type	Resource type: `cluster`
resource_id	Cluster ID
host	Host FQDN
node	Host type: `primary` or `replica`
subcluster_name	Subcluster name

CPU metrics

These metrics show processor core workload.

Name Type, units	Description
`cpu.guest` `DGAUGE`, %	CPU core usage, `guest` usage type
`cpu.idle` `DGAUGE`, %	CPU core usage, `idle` usage type
`cpu.iowait` `DGAUGE`, %	CPU core usage, `iowait` usage type
`cpu.irq` `DGAUGE`, %	CPU core usage, `irq` usage type
`cpu.nice` `DGAUGE`, %	CPU core usage, `nice` usage type
`cpu.softirq` `DGAUGE`, %	CPU core usage, `softirq` usage type
`cpu.steal` `DGAUGE`, %	CPU core usage, `steal` usage type
`cpu.system` `DGAUGE`, %	CPU core usage, `system` usage type
`cpu.user` `DGAUGE`, %	CPU core usage, `user` usage type
`load.avg_15min` `DGAUGE`, %	Average load over 15 minutes
`load.avg_1min` `DGAUGE`, %	Average load over one minute
`load.avg_5min` `DGAUGE`, %	Average load over five minutes
`pg_backend_cpu` `DGAUGE`, %	PostgreSQL process CPU utilization

Disk metrics

Name Type, units	Description
`disk.free_bytes` `DGAUGE`, bytes	Free space
`disk.free_inodes` `DGAUGE`, count	Free inodes
`disk.temp_files_size` `DGAUGE`, bytes	Size of temporary files
`disk.total_bytes` `DGAUGE`, bytes	Available space
`disk.total_inodes` `DGAUGE`, count	Available inodes
`disk.used_bytes` `DGAUGE`, bytes	Used space
`disk.used_inodes` `DGAUGE`, count	Used inodes
`disk.wal_size` `DGAUGE`, bytes	Write-ahead log (WAL) size
`pg_backend_read_bytes` `DGAUGE`, bytes per second	PostgreSQL process data read rate
`pg_backend_write_bytes` `DGAUGE`, bytes per second	PostgreSQL process data write rate

Disk I/O metrics

Name Type, units	Description
`io.avg_read_time` `DGAUGE`, milliseconds	Average disk read time
`io.avg_write_time` `DGAUGE`, milliseconds	Average disk write time
`io.disk*.avg_read_time` `DGAUGE`, milliseconds	Average read time for a given disk
`io.disk*.avg_write_time` `DGAUGE`, milliseconds	Average write time for a given disk
`io.disk*.read_bytes` `DGAUGE`, bytes per second	Read speed for a given disk
`io.disk*.read_count` `DGAUGE`, operations per second	Number of reads per second for a given disk
`io.disk*.read_merged_count` `DGAUGE`, operations per second	Number of merged read operations per second for a given disk
`io.disk*.utilization` `DGAUGE`, %	Utilization of a given disk; disabled for network drives.
`io.disk*.write_bytes` `DGAUGE`, bytes per second	Write speed for a given disk
`io.disk*.write_count` `DGAUGE`, operations per second	Number of writes per second for a given disk
`io.disk*.write_merged_count` `DGAUGE`, operations per second	Number of merged write operations per second for a given disk
`io.read_bytes` `DGAUGE`, bytes per second	Disk read rate
`io.read_count` `DGAUGE`, operations per second	Number of read operations per second
`io.read_merged_count` `DGAUGE`, operations per second	Number of merged read operations per second
`io.utilization` `DGAUGE`, %	Disk utilization
`io.write_bytes` `DGAUGE`, bytes per second	Disk write speed
`io.write_count` `DGAUGE`, operations per second	Number of writes per second
`io.write_merged_count` `DGAUGE`, operations per second	Number of merged write operations per second

RAM metrics

Name Type, units	Description
`mem.active_bytes` `DGAUGE`, bytes	Active resident memory (frequently accessed and released when absolutely necessary)
`mem.available_bytes` `DGAUGE`, bytes	RAM usage, `available` usage type
`mem.buffers_bytes` `DGAUGE`, bytes	RAM usage, `buffers` usage type
`mem.cached_bytes` `DGAUGE`, bytes	RAM usage, `cached` usage type
`mem.free_bytes` `DGAUGE`, bytes	Amount of free RAM available, excluding `mem.buffers_bytes` and `mem.cached_bytes`
`mem.shared_bytes` `DGAUGE`, bytes	RAM usage, `shared` usage type
`mem.total_bytes` `DGAUGE`, bytes	RAM usage, `total` usage type
`mem.used_bytes` `DGAUGE`, bytes	Amount of RAM currently used by running processes
`oom_count` `DGAUGE`, count	Number of out-of-memory events

Network metrics

Name Type, units	Description
`net.bytes_recv` `DGAUGE`, bytes per second	Network data receive rate
`net.bytes_sent` `DGAUGE`, bytes per second	Network data transmit rate
`net.dropin` `DGAUGE`, count	Dropped receive packets
`net.dropout` `DGAUGE`, count	Dropped transmit packets
`net.errin` `DGAUGE`, count	Receive error count
`net.errout` `DGAUGE`, count	Transmit error count
`net.packets_recv` `DGAUGE`, packets per second	Network packet receive rate
`net.packets_sent` `DGAUGE`, packets per second	Network packet transmit rate

Service metrics

Cluster metrics

Name Type, units	Description
`can_read` `DGAUGE`, 0/1	Read access indicator. It can be either `1` if a cluster is available for reads or `0` if it is not.
`can_write` `DGAUGE`, 0/1	Write access indicator. It can be either `1` if a cluster is available for writes or `0` if it is not.
`postgres-is_alive` `DGAUGE`, 0/1	Host health indicator. It can be either `1` if a DB host is healthy or `0` if it is not.
`postgres-is_primary` `DGAUGE`, 0/1	Master host indicator. It can be either `1` if a DB host is a master or `0` if it is not.
`postgres-is_replica` `DGAUGE`, 0/1	Replica host indicator. It can be either `1` if a DB host is a replica or `0` if it is not.
`postgres-log_errors` `DGAUGE`, messages per second	Number of errors logged per second
`postgres-log_fatals` `DGAUGE`, messages per second	Number of fatal errors logged per second
`postgres-log_slow_queries` `DGAUGE`, queries per second	Number of slow queries logged per second
`postgres-log_warnings` `DGAUGE`, messages per second	Number of warnings logged per second
`postgres-replication_lag` `DGAUGE`, seconds	Replication lag
`postgres_max_connections` `DGAUGE`, count	Maximum number of connections
`postgres-oldest_inactive_replication_slot_duration` `DGAUGE`, seconds	Duration of the oldest inactive replication slot
`postgres_oldest_prepared_xact_duration` `DGAUGE`, seconds	Duration of the oldest prepared transaction
`postgres_oldest_query_duration` `DGAUGE`, seconds	Duration of the oldest query
`postgres_oldest_transaction_duration` `DGAUGE`, seconds	Duration of the oldest transaction
`postgres_role_conn_limit` `DGAUGE`, count	Maximum possible number of concurrent sessions per user
`postgres_role_total_conn_limit` `DGAUGE`, count	Maximum possible number of concurrent sessions for all users
`postgres_total_connections` `DGAUGE`, count	Number of connections
`postgres_wal_rate_bytes` `DGAUGE`, bytes per second	Write-ahead logging rate
`postgres_xid_left` `DGAUGE`, count	Number of transaction counters left
`postgres_xid_left_percent` `DGAUGE`, %	Percentage of transaction counters left
`postgres_xid_used_percent` `DGAUGE`, %	Percentage of transaction counters used

DB metrics

Name Type, units	Description
`_pg_database_size` `DGAUGE`, bytes	Database size. Additional labels: `dbname`
`<DB_name>_tup_deleted` `DGAUGE`, count	Number of rows deleted by queries in `<DB_name>`
`<DB_name>_tup_fetched` `DGAUGE`, count	Number of rows fetched by queries in `<DB_name>`
`<DB_name>_tup_inserted` `DGAUGE`, count	Number of rows inserted by queries in `<DB_name>`
`<DB_name>_tup_returned` `DGAUGE`, count	Number of rows returned by queries in `<DB_name>`
`<DB_name>_tup_updated` `DGAUGE`, count	Number of rows updated by queries in `<DB_name>`

Connection pooler metrics

Name Type, units	Description
`pooler-avg_query_time` `DGAUGE`, milliseconds	Average query execution time per DB host
`pooler-avg_xact_time` `DGAUGE`, milliseconds	Average execution time per transaction per DB host
`pooler-bytes_recieved` `DGAUGE`, bytes	Size of data received
`pooler-bytes_recieved-<DB_name>-<username>` `DGAUGE`, bytes	Size of data received by `<username>` through `<DB_name>`
`pooler-bytes_sent` `DGAUGE`, bytes	Size of data sent
`pooler-bytes_sent-<DB_name>-<username>` `DGAUGE`, bytes	Size of data sent by `<username>` through `<DB_name>`
`pooler-free_clients` `DGAUGE`, count	Number of client connections left in the connection pooler
`pooler-free_servers` `DGAUGE`, count	Number of server connections left in the connection pooler
`pooler-is_alive` `DGAUGE`, 0/1	Connection pooler health for each host both as a master and as a replica
`pooler-login_clients` `DGAUGE`, count	Number of client connections established in the connection pooler
`pooler-pgbouncer_tcp_connections` `DGAUGE`, connections per second	Number of PostgreSQL TCP connections
`pooler-postgres_tcp_connections` `DGAUGE`, connections per second	Number of PgBouncer TCP connections
`pooler-query_0.5` `DGAUGE`, milliseconds	Query execution time, median value
`pooler-query_0.5-<DB_name>-<username>` `DGAUGE`, milliseconds	Execution time for queries run by `<username>` through `<DB_name>`, median value
`pooler-query_0.75` `DGAUGE`, milliseconds	Query execution time, 75th percentile
`pooler-query_0.75-<DB_name>-<username>` `DGAUGE`, milliseconds	Execution time for queries run by `<username>` through `<DB_name>`, 75th percentile
`pooler-query_0.9` `DGAUGE`, milliseconds	Query execution time, 90th percentile
`pooler-query_0.9-<DB_name>-<username>` `DGAUGE`, milliseconds	Execution time for queries run by `<username>` through `<DB_name>`, 90th percentile
`pooler-query_0.95` `DGAUGE`, milliseconds	Query execution time, 95th percentile
`pooler-query_0.95-<DB_name>-<username>` `DGAUGE`, milliseconds	Execution time for queries run by `<username>` through `<DB_name>`, 95th percentile
`pooler-query_0.99` `DGAUGE`, milliseconds	Query execution time, 99th percentile
`pooler-query_0.99-<DB_name>-<username>` `DGAUGE`, milliseconds	Execution time for queries run by `<username>` through `<DB_name>`, 99th percentile
`pooler-query_0.999` `DGAUGE`, milliseconds	Query execution time, 99.9th percentile
`pooler-query_0.999-<DB_name>-<username>` `DGAUGE`, milliseconds	Execution time for queries run by `<username>` through `<DB_name>`, 99.9th percentile
`pooler-query_count` `DGAUGE`, count	Number of running queries per DB host
`pooler-tcp_conn_count` `DGAUGE`, count	Number of TCP connections per DB host
`pooler-tcp_conn_count-<DB_name>-<username>` `DGAUGE`, count	Number of `<username>` TCP connections per DB host through `<DB_name>`
`pooler-total_tcp_connections` `DGAUGE`, connections per second	Number of PostgreSQL and PgBouncer TCP connections
`pooler-transaction_0.5` `DGAUGE`, milliseconds	Transaction processing time, median value
`pooler-transaction_0.5-<DB_name>-<username>` `DGAUGE`, milliseconds	Processing time for transactions executed by `<username>` through `<DB_name>`, median value
`pooler-transaction_0.75` `DGAUGE`, milliseconds	Transaction processing time, 75th percentile
`pooler-transaction_0.75-<DB_name>-<username>` `DGAUGE`, milliseconds	Processing time for transactions executed by `<username>` through `<DB_name>`, 75th percentile
`pooler-transaction_0.9` `DGAUGE`, milliseconds	Transaction processing time, 90th percentile
`pooler-transaction_0.9-<DB_name>-<username>` `DGAUGE`, milliseconds	Processing time for transactions executed by `<username>` through `<DB_name>`, 90th percentile
`pooler-transaction_0.95` `DGAUGE`, milliseconds	Transaction processing time, 95th percentile
`pooler-transaction_0.95-<DB_name>-<username>` `DGAUGE`, milliseconds	Processing time for transactions executed by `<username>` through `<DB_name>`, 95th percentile
`pooler-transaction_0.99` `DGAUGE`, milliseconds	Transaction processing time, 99th percentile
`pooler-transaction_0.99-<DB_name>-<username>` `DGAUGE`, milliseconds	Processing time for transactions executed by `<username>` through `<DB_name>`, 99th percentile
`pooler-transaction_0.999` `DGAUGE`, milliseconds	Transaction processing time, 99.9th percentile
`pooler-transaction_0.999-<DB_name>-<username>` `DGAUGE`, milliseconds	Processing time for transactions executed by `<username>` through `<DB_name>`, 99.9th percentile
`pooler-used_clients` `DGAUGE`, count	Number of client connections in the connection pooler
`pooler-used_servers` `DGAUGE`, count	Number of server connections in the connection pooler
`pooler-xact_count` `DGAUGE`, count	Number of running transactions per DB host

Vacuum metrics

Name Type, units	Description
`postgres_autovacuum.autovacuum_max_workers` `DGAUGE`, count	Maximum number of autovacuum workers, as defined by `autovacuum_max_workers`.
`postgres_autovacuum.total_regular_workers` `DGAUGE`, count	Number of active autovacuum workers
`postgres_autovacuum.total_user_workers` `DGAUGE`, count	Number of active user-launched autovacuum workers
`postgres_autovacuum.total_wraparound_workers` `DGAUGE`, count	Number of active autovacuum workers launched to prevent wraparound
`postgres_autovacuum.scanned_pct` `DGAUGE`, %	Percentage of table rows scanned by an autovacuum worker
`postgres_autovacuum.vacuumed_pct` `DGAUGE`, %	Percentage of table rows vacuumed by an autovacuum worker

Yandex Monitoring metric reference

CPU metricsCPU metrics

Disk metricsDisk metrics

Disk I/O metricsDisk I/O metrics

RAM metricsRAM metrics

Network metricsNetwork metrics

Service metricsService metrics

Cluster metricsCluster metrics

DB metricsDB metrics

Connection pooler metricsConnection pooler metrics

Vacuum metricsVacuum metrics

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