| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
| Cc: | Tim Bellis <Tim(dot)Bellis(at)metaswitch(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Autovacuum stuck for hours, blocking queries |
| Date: | 2017-02-15 22:33:14 |
| Message-ID: | 20170215223314.xcdwpgecvt7tukrj@alvherre.pgsql |
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| Lists: | pgsql-general |
Scott Marlowe wrote:
> Then a ddl gets in line. It has to wait on the vacuum, and the vacuum,
> set to run super slow. And everybody waits. On vacuum.
Note that this is normally not seen, because autovacuum cancels itself
when somebody is blocked behind it -- until the table reaches the
freeze_max_age limit, and then autovacuum is a for-wraparound one that
is no longer terminated, and then everybody has to wait on it.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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