RE: Performance degradation after upgrading from 9.5 to 14

Same issue and took us ages to work out that is was JIT! The default is on, and setting off solves the problem. I have seen several blogs reporting the same and so wonder why this default is on?

Z

From: Олександр Янін <aleksandr(dot)janin(at)privatbank(dot)ua>
Sent: Monday, April 22, 2024 8:01 PM
To: Johnathan Tiamoh <johnathantiamoh(at)gmail(dot)com>
Cc: pgsql-generallists.postgresql.org <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: Performance degradation after upgrading from 9.5 to 14

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Try setting enable_memoize to off.
Our practice has shown that enabling this parameter by default often resulted in less than optimal query plans in the cache.

ср, 17 апр. 2024 г. в 20:13, Johnathan Tiamoh <johnathantiamoh(at)gmail(dot)com<mailto:johnathantiamoh(at)gmail(dot)com>>:
Hello,

I performed an upgrade from postgresql-9.5 to postgresql-14 and the performance has degraded drastically.

Please, is they any advice on getting performance back ?