Difference between revisions of "Autovacuum"
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*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 58: | Line 59: | ||
* [[PostgreSQL VACUUM]] | * [[PostgreSQL VACUUM]] | ||
* <code>[[pg_database]]</code> | * <code>[[pg_database]]</code> | ||
| + | * [[Cache hit ratio]] | ||
| + | * <code>[[pg database]]</code> | ||
| + | * [[Autoanalyze]] | ||
| + | [[LOG: autovacuum launcher started]] | ||
| + | [[postgres: autovacuum launcher]] | ||
== See also == | == See also == | ||
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
EXPLAINoutput
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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