Re: [PATCH] Add extra statistics to explain for Nested Loop
Pavel Stehule <pavel.stehule@gmail.com>
From: Pavel Stehule <pavel.stehule@gmail.com>
To: e.sokolova@postgrespro.ru
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2020-10-16T08:11:48Z
Lists: pgsql-hackers
pá 16. 10. 2020 v 9:43 odesílatel <e.sokolova@postgrespro.ru> napsal: > Hi, hackers. > For some distributions of data in tables, different loops in nested loop > joins can take different time and process different amounts of entries. > It makes average statistics returned by explain analyze not very useful > for DBA. > To fix it, here is the patch that add printing of min and max statistics > for time and rows across all loops in Nested Loop to EXPLAIN ANALYSE. > Please don't hesitate to share any thoughts on this topic! > +1 This is great feature - sometimes it can be pretty messy current limited format Pavel -- > Ekaterina Sokolova > Postgres Professional: http://www.postgrespro.com > The Russian Postgres Company
Commits
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Fix wrong units in two ExplainPropertyFloat calls.
- f90c708a0486 14.0 cited