Версия PostgreSQL:


Задаёт задержку при превышении предела стоимости, которая будет применяться при автоматических операциях VACUUM. При значении -1 применяется обычная задержка vacuum_cost_delay. Значение по умолчанию — 20 миллисекунд. Задать этот параметр можно только в postgresql.conf или в командной строке при запуске сервера. Однако его можно переопределить для отдельных таблиц, изменив их параметры хранения.

Рекомендации [EN]

If autovacuum is having too much of a performance impact on running queries, you might want to increase this setting to 50ms. However, this will also cause individual vacuum tasks to take longer.


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