6.0 KiB
6.0 KiB
pg_stat_monitor view reference
pg_stat_monitor provides a view where the statistics data is displayed. To see all available columns, run the following command from psql:
postgres=# \d pg_stat_monitor
Depending on the PostgreSQL version, some column names may differ. The following table describes the pg_stat_monitor view for PostgreSQL 14 and higher versions.
| Column | Type | Description |
|---|---|---|
| bucket | integer | Data collection unit. The number shows what bucket in a chain a record belongs to |
| bucket_start_time | timestamp with time zone | The start time of the bucket |
| userid | regrole | An ID of the user who run a query |
| datname | name | The name of a database where the query was executed |
| toplevel | bool | True means that a query was executed as a top-level statement |
| client_ip | inet | The IP address of a client that run the query |
| queryid | text | The internal hash code serving to identify every query in a statement |
| planid | text | An internally generated ID of a query plan |
| query_plan | text | The sequence of steps used to execute a query. This parameter is available only when the pgsm_enable_query_plan is enabled. |
| top_query | text | Shows the top query used in a statement |
| query | text | The actual text of the query |
| application_name | text | Shows the name of the application connected to the database |
| relations | text[] | The list of tables involved in the query |
| cmd_type | integer | Type of the query executed |
| cmd_type_text | text[] | The description of the query executed |
| elevel | integer | Shows the error level of a query (WARNING, ERROR, LOG) |
| sqlcode | integer | SQL error code |
| message | text | The error message |
| plans_calls | bigint | The number of times the statement was planned |
| total_plan_time | double precision | The total time (in ms) spent on planning the statement |
| min_plan_time | double precision | Minimum time (in ms) spent on planning the statement |
| max_plan_time | double precision | Maximum time (in ms) spent on planning the statement |
| mean_plan_time | double precision | The mean (average) time (in ms) spent on planning the statement |
| stddev_plan_time | double precision | The standard deviation of time (in ms) spent on planning the statement |
| calls | bigint | The number of times a particular query was executed |
| total_exec_time | double precision | The total time (in ms) spent on executing a query |
| min_exec_time | double precision | The minimum time (in ms) it took to execute a query |
| max_exec_time | double precision | The maximum time (in ms) it took to execute a query |
| mean_time | double precision | The mean (average) time (in ms) it took to execute a query |
| stddev_exec_time | double precision | The standard deviation of time (in ms) spent on executing a query |
| rows_retrieved | bigint | The number of rows retrieved when executing a query |
| shared_blks_hit | bigint | Shows the total number of shared memory blocks returned from the cache |
| shared_blks_read | bigint | Shows the total number of shared blocks returned not from the cache |
| shared_blks_dirtied | bigint | Shows the number of shared memory blocks "dirtied" by the query execution (i.e. a query modified at least one tuple in a block and this block must be written to a drive) |
| shared_blks_written | bigint | Shows the number of shared memory blocks written simultaneously to a drive during the query execution |
| local_blks_hit | bigint | The number of blocks which are considered as local by the backend and thus are used for temporary tables |
| local_blks_read | bigint | Total number of local blocks read during the query execution |
| local_blks_dirtied | bigint | Total number of local blocks "dirtied" during the query execution (i.e. a query modified at least one tuple in a block and this block must be written to a drive) |
| local_blks_written | bigint | Total number of local blocks written simultaneously to a drive during the query execution |
| temp_blks_read | bigint | Total number of blocks of temporary files read from a drive. Temporary files are used when there's not enough memory to execute a query |
| temp_blks_written | bigint | Total number of blocks of temporary files written to a drive |
| blk_read_time | double precision | Total waiting time (in ms) for reading blocks |
| blk_write_time | double precision | Total waiting time (in ms) for writing blocks to a drive |
| resp_calls | text[] | Call histogram |
| cpu_user_time | double precision | The time (in ms) the CPU spent on running the query |
| cpu_sys_time | double precision | The time (in ms) the CPU spent on executing the kernel code |
| wal_records | bigint | The total number of WAL (Write Ahead Logs) generated by the query |
| wal_fpi | bigint | The total number of WAL FPI (Full Page Images) generated by the query |
| wal_bytes | numeric | Total number of bytes used for the WAL generated by the query |
| state_code | bigint | Shows the state code of a query |
| state | text | The state message |