Difference between revisions of "Autovacuum"
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Line 42: | Line 42: | ||
0 | 0 | ||
(1 row) | (1 row) | ||
+ | |||
+ | SELECT | ||
+ | schemaname, relname, | ||
+ | last_vacuum, last_autovacuum, | ||
+ | vacuum_count, autovacuum_count | ||
+ | FROM [[pg_stat_user_tables]]; | ||
==Activites== | ==Activites== | ||
*Read Understanding autovacuum in Amazon RDS for PostgreSQL environments, 2020: https://aws.amazon.com/blogs/database/understanding-autovacuum-in-amazon-rds-for-postgresql-environments/ | *Read Understanding autovacuum in Amazon RDS for PostgreSQL environments, 2020: https://aws.amazon.com/blogs/database/understanding-autovacuum-in-amazon-rds-for-postgresql-environments/ | ||
+ | * Read https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.Autovacuum.html | ||
* [[DataFileRead]] | * [[DataFileRead]] | ||
* Understand <code>[[EXPLAIN]]</code> output | * Understand <code>[[EXPLAIN]]</code> output | ||
Line 51: | Line 58: | ||
== Related terms == | == Related terms == | ||
* [[PostgreSQL VACUUM]] | * [[PostgreSQL VACUUM]] | ||
+ | * <code>[[pg_database]]</code> | ||
+ | * [[Cache hit ratio]] | ||
+ | * <code>[[pg database]]</code> | ||
+ | * [[Autoanalyze]] | ||
+ | [[LOG: autovacuum launcher started]] | ||
+ | [[postgres: autovacuum launcher]] | ||
== See also == | == See also == | ||
+ | * {{VACUUM}} | ||
* {{SQL}} | * {{SQL}} | ||
* {{PostgreSQL}} | * {{PostgreSQL}} |
Latest revision as of 08:57, 9 January 2024
select category,name,setting,unit,source,min_val,max_val from pg_settings where category = 'Autovacuum'; category | name | setting | unit | source | min_val | max_val ------------+-------------------------------------+-----------+------+--------------------+---------+------------ Autovacuum | autovacuum | on | | default | | Autovacuum | autovacuum_analyze_scale_factor | 0.05 | | configuration file | 0 | 100 Autovacuum | autovacuum_analyze_threshold | 50 | | default | 0 | 2147483647 Autovacuum | autovacuum_freeze_max_age | 200000000 | | default | 100000 | 2000000000 Autovacuum | autovacuum_max_workers | 3 | | configuration file | 1 | 262143 Autovacuum | autovacuum_multixact_freeze_max_age | 400000000 | | default | 10000 | 2000000000 Autovacuum | autovacuum_naptime | 15 | s | configuration file | 1 | 2147483 Autovacuum | autovacuum_vacuum_cost_delay | 2 | ms | default | -1 | 100 Autovacuum | autovacuum_vacuum_cost_limit | 200 | | configuration file | -1 | 10000 Autovacuum | autovacuum_vacuum_scale_factor | 0.1 | | configuration file | 0 | 100 Autovacuum | autovacuum_vacuum_threshold | 50 | | default | 0 | 2147483647 (11 rows)
select category,name,setting,unit,source,min_val,max_val from pg_settings where category = 'Autovacuum'; category | name | setting | unit | source | min_val | max_val ------------+-------------------------------------+-----------+------+---------+---------+------------ Autovacuum | autovacuum | on | | default | | Autovacuum | autovacuum_analyze_scale_factor | 0.1 | | default | 0 | 100 Autovacuum | autovacuum_analyze_threshold | 50 | | default | 0 | 2147483647 Autovacuum | autovacuum_freeze_max_age | 200000000 | | default | 100000 | 2000000000 Autovacuum | autovacuum_max_workers | 3 | | default | 1 | 262143 Autovacuum | autovacuum_multixact_freeze_max_age | 400000000 | | default | 10000 | 2000000000 Autovacuum | autovacuum_naptime | 60 | s | default | 1 | 2147483 Autovacuum | autovacuum_vacuum_cost_delay | 2 | ms | default | -1 | 100 Autovacuum | autovacuum_vacuum_cost_limit | -1 | | default | -1 | 10000 Autovacuum | autovacuum_vacuum_scale_factor | 0.2 | | default | 0 | 100 Autovacuum | autovacuum_vacuum_threshold | 50 | | default | 0 | 2147483647 (11 rows)
select count(*) from pg_stat_activity where query like 'autovacuum:%'; count ------- 0 (1 row)
SELECT schemaname, relname, last_vacuum, last_autovacuum, vacuum_count, autovacuum_count FROM pg_stat_user_tables;
Activites[edit]
- Read Understanding autovacuum in Amazon RDS for PostgreSQL environments, 2020: https://aws.amazon.com/blogs/database/understanding-autovacuum-in-amazon-rds-for-postgresql-environments/
- Read https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Appendix.PostgreSQL.CommonDBATasks.Autovacuum.html
- DataFileRead
- Understand
EXPLAIN
output
Related terms[edit]
LOG: autovacuum launcher started postgres: autovacuum launcher
See also[edit]
- VACUUM: PostgreSQL VACUUM, Autovacuum,
pg_database, pg_stat_activity
, Redshift VACUUM - SQL, NewSQL, RDMS: GraphQL (2015), SQLite,
select, insert
,select count
, Distributed SQL, TablePlus, Cache hit ratio,pg_stat_user_tables
,EXPLAIN
, Index (PostgreSQL), DDL, SQL/MED, Group by, List users, SQL Injection, SQLAlchemy,CREATE USER, CREATE ROLE, EXPLAIN, ALTER DATABASE, REVOKE, NOLOCK, NOWAIT, EXISTS
, Unique constraint,.sql
- PostgreSQL:
pg_dump, pg_restore
,pgAdmin, pg_config, psql, pg_ctl, pg_isready, initdb
, Role, Schema, DBeaver, Navicat, DataGrip, OmniDB,Adminer
, docker-compose.xml PostgreSQL, PostgreSQL version, PostgreSQL logs,postgresql.conf
,pg_hba.conf, $HOME/.pg_service.conf
, Create database (PostgreSQL), Create user,createdb
,GRANT
,pg_stat
, PostgreSQL VACUUM, EXPLAIN,pg stat activity
, Autovacuum, ALTER DATABASE, PostgreSQL statistics collector, Shared buffers, EXPLAIN (PostgreSQL),EXPLAIN ANALYZE
, Bitmap scan,EXPLAIN VERBOSE
,EXPLAIN VERBOSE (PostgresSQL)
,WAL
,ALTER USER
,CREATE ROLE, CREATE USER
,\du
,show users
,\l
, The Statistics Collector, pganalyze,cron.schedule
, Master,pg_tables
, PostgreSQL replication,CREATE, SET
, TOAST, PgBouncer, Restore DB, Index, meta-commands, Table, foreign table, Schema, Sequence, Views, materialized view, Table Partitioning, monitoring, PostgreSQL System Administration Functions, PostgreSQL extension, privileges, logging, PGTune, PostgreSQL parameter tunning, PostgreSQL modules, pgbench, PostgreSQL users, catalogs
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