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Disabling this option is useful to run VACUUM (with or without FULL) on only the toast table of a relation, bypassing the main relation. This option is enabled by default. Running directly VACUUM on a toast table was already possible without this feature, by using the non-deterministic name of a toast relation (as of pg_toast.pg_toast_N, where N would be the OID of the parent relation) in the VACUUM command, and it required a scan of pg_class to know the name of the toast table. So this feature is basically a shortcut to be able to run VACUUM or VACUUM FULL on a toast relation, using only the name of the parent relation. A new switch called --no-process-main is added to vacuumdb, to work as an equivalent of PROCESS_MAIN. Regression tests are added to cover VACUUM and VACUUM FULL, looking at pg_stat_all_tables.vacuum_count to see how many vacuums have run on each table, main or toast. Author: Nathan Bossart Reviewed-by: Masahiko Sawada Discussion: https://postgr.es/m/20221230000028.GA435655@nathanxps13 |
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| initdb | ||
| pg_amcheck | ||
| pg_archivecleanup | ||
| pg_basebackup | ||
| pg_checksums | ||
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| pg_controldata | ||
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| pg_resetwal | ||
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