From: | Mariel Cherkassky <mariel(dot)cherkassky(at)gmail(dot)com> |
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To: | Jeff Janes <jeff(dot)janes(at)gmail(dot)com> |
Cc: | Andrew Zakharov <Andrew898(at)mail(dot)ru>, pgsql-performance(at)lists(dot)postgresql(dot)org |
Subject: | Re: performance degredation after upgrade from 9.6 to 12 |
Date: | 2019-11-24 18:05:39 |
Message-ID: | CA+t6e1m1CFhrqfkkETUnCZyLoJFyRdXvtwUmxji3DoJoskAA5g@mail.gmail.com |
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Lists: | pgsql-admin pgsql-performance |
Hey Jeff,
This example was only used to show that pg96 had better perfomance than
pg12 in a very simple case.
In all the tests that I run most of the queries took less time on 9.6`s
version. I dont know why, but as you can see after disabling the parameter
the simple test that I did showed different results. I intend to test this
theory tomorrow. I'm going to disable the parameter and run the same
application flows that I have on both machines (9.6 vs 12 with zero value
for the param).
I didnt send this mail after doing just one simple test, I have more than
100 queries that work better on 9.6 . If u have any explanation I will be
happy to hear.
I'll update tomorrow once I'll have the results..
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