From: | Jim Mlodgenski <jimmy76(at)gmail(dot)com> |
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To: | PgHacker <pgsql-hackers(at)postgresql(dot)org> |
Subject: | mat views stats |
Date: | 2017-02-20 15:06:25 |
Message-ID: | CAB_5SRchSz7-WmdO5szdiknG8Oj_GGqJytrk1KRd11yhcMs1KQ@mail.gmail.com |
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Lists: | pgsql-hackers |
I've come across a number of times where the statistics on materialized
views become stale producing bad plans. It turns out that autovacuum only
touches a materialized view when it is first created and ignores it on a
refresh. When you have a materialized view like yesterdays_sales the data
in the materialized view turns over every day.
Attached is a patch to trigger autovacuum based on a matview refresh along
with a system view pg_stat_all_matviews to show information more meaningful
for materialized views.
-- Jim
Attachment | Content-Type | Size |
---|---|---|
stat_matview.patch | text/x-patch | 20.8 KB |
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