5.1 KiB
Comparing pg_stat_monitor and pg_stat_statements
The pg_stat_monitor extension is developed on the basis of pg_stat_statements as its more advanced replacement.
Thus, pg_stat_monitor inherits the columns available in pg_stat_statements plus provides additional ones.
Note that pg_stat_monitor and pg_stat_statements process statistics data differently. Because of these differences, memory blocks and WAL (Write Ahead Logs) related statistics data are displayed inconsistently when both extensions are used together.
To see all available columns, run the following command from the psql terminal:
postgres=# \d pg_stat_monitor;
The following table compares the pg_stat_monitor view with that of pg_stat_statements.
Note that the column names differ depending on the PostgreSQL version you are running.
| Column name for PostgreSQL 13 and above | Column name for PostgreSQL 11 and 12 | pg_stat_monitor | pg_stat_statements |
|---|---|---|---|
| bucket | bucket | ✔️ | ❌ |
| bucket_start_time | bucket_start_time | ✔️ | ❌ |
| userid | userid | ✔️ | ✔️ |
| datname | datname | ✔️ | ✔️ |
| toplevel1 | ✔️ | ✔️ | |
| client_ip | client_ip | ✔️ | ❌ |
| queryid | queryid | ✔️ | ✔️ |
| planid | planid | ✔️ | ❌ |
| query_plan | query_plan | ✔️ | ❌ |
| top_query | top_query | ✔️ | ❌ |
| top_queryid | top_queryid | ✔️ | ❌ |
| query | query | ✔️ | ✔️ |
| application_name | application_name | ✔️ | ❌ |
| relations | relations | ✔️ | ❌ |
| cmd_type | cmd_type | ✔️ | ❌ |
| elevel | elevel | ✔️ | ❌ |
| sqlcode | sqlcode | ✔️ | ❌ |
| message | message | ✔️ | ❌ |
| plans_calls | plans_calls | ✔️ | ✔️ |
| total_plan_time | ✔️ | ✔️ | |
| min_plan_time | ✔️ | ✔️ | |
| max_plan_time | ✔️ | ✔️ | |
| mean_plan_time | ✔️ | ✔️ | |
| stddev_plan_time | ✔️ | ✔️ | |
| calls | calls | ✔️ | ✔️ |
| total_exec_time | total_time | ✔️ | ✔️ |
| min_exec_time | min_time | ✔️ | ✔️ |
| max_exec_time | max_time | ✔️ | ✔️ |
| mean_exec_time | mean_time | ✔️ | ✔️ |
| stddev_exec_time | stddev_time | ✔️ | ✔️ |
| rows_retrieved | rows_retrieved | ✔️ | ✔️ |
| shared_blks_hit | shared_blks_hit | ✔️ | ✔️ |
| shared_blks_read | shared_blks_read | ✔️ | ✔️ |
| shared_blks_dirtied | shared_blks_dirtied | ✔️ | ✔️ |
| shared_blks_written | shared_blks_written | ✔️ | ✔️ |
| local_blks_hit | local_blks_hit | ✔️ | ✔️ |
| local_blks_read | local_blks_read | ✔️ | ✔️ |
| local_blks_dirtied | local_blks_dirtied | ✔️ | ✔️ |
| local_blks_written | local_blks_written | ✔️ | ✔️ |
| temp_blks_read | temp_blks_read | ✔️ | ✔️ |
| temp_blks_written | temp_blks_written | ✔️ | ✔️ |
| blk_read_time | blk_read_time | ✔️ | ✔️ |
| blk_write_time | blk_write_time | ✔️ | ✔️ |
| resp_calls | resp_calls | ✔️ | ❌ |
| cpu_user_time | cpu_user_time | ✔️ | ❌ |
| cpu_sys_time | cpu_sys_time | ✔️ | ❌ |
| wal_records | wal_records | ✔️ | ✔️ |
| wal_fpi | wal_fpi | ✔️ | ✔️ |
| wal_bytes | wal_bytes | ✔️ | ✔️ |
| state_code | state_code | ✔️ | ❌ |
| state | state | ✔️ | ❌ |
To learn more about the features in pg_stat_monitor, please see the User guide.
Additional reading: pg_stat_statements
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Available starting from PostgreSQL 14 and above ↩︎