Last active
November 26, 2024 13:04
-
-
Save VincentAntoine/43858a6023aa04ee274e20255fa91a1e to your computer and use it in GitHub Desktop.
Postgresql - Analyse du bloat des tables du schéma `public` avec `pgstattuple`
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| WITH t AS ( | |
| SELECT | |
| s.relid, | |
| s.relname, | |
| last_autovacuum, | |
| last_vacuum | |
| FROM pg_stat_user_tables s | |
| WHERE s.schemaname = 'public' | |
| ) | |
| SELECT | |
| --COALESCE(chunk_catalog.hypertable_name, s.relname) as table, | |
| s.relname as table, | |
| pg_size_pretty(table_len) AS table_size_on_disk, | |
| pg_size_pretty(tuple_len) AS live_data_size, | |
| pg_size_pretty(dead_tuple_len) AS dead_data_size, | |
| pg_size_pretty(free_space) AS free_space_size, | |
| pg_size_pretty(dead_tuple_len + free_space) AS total_wasted_space, | |
| dead_tuple_len + free_space AS total_wasted_space_, | |
| tuple_len::DOUBLE PRECISION / table_len::DOUBLE PRECISION AS live_percent, | |
| dead_tuple_len::DOUBLE PRECISION / table_len::DOUBLE PRECISION AS dead_percent, | |
| free_space::DOUBLE PRECISION / table_len::DOUBLE PRECISION AS free_percent, | |
| s.last_autovacuum, | |
| s.last_vacuum | |
| FROM t s | |
| LEFT JOIN LATERAL pgstattuple(s.relid::regclass) stup ON true | |
| -- LEFT JOIN chunk_catalog | |
| -- ON chunk_catalog.chunk_regclass = s.relid::regclass | |
| WHERE table_len > 8192 | |
| ORDER BY dead_tuple_len + free_space DESC | |
| --GROUP BY 1 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment