1) How did you upgrade? pg_dump or pg_upgrade? I use pg_ugrade with kink option.
2) Did you run ANALYZE to collect statistics after the upgrade? Yes. I ran vacuumdb-analyze in stages after the upgrade 3) Did you transfer the configuration, or did you just create a new cluster with the default values? I transfer the configuration 4) What exactly is slower? Queries? Inserts? queries 5) Can you quantify the impact? Is it 2x slower? 100x slower? it's more than 5 times slower than before. Very high load averages On Wed, Apr 17, 2024 at 1:25 PM Tomas Vondra <tomas.von...@enterprisedb.com> wrote: > On 4/17/24 19:13, Johnathan Tiamoh wrote: > > 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 ? > > > > There's very little practical advice we can provide based on this > report, because it's missing any useful details. There's a number of > things that might have caused this, but we'd have to speculate. > > For example: > > 1) How did you upgrade? pg_dump or pg_upgrade? > > 2) Did you run ANALYZE to collect statistics after the upgrade? > > 3) Did you transfer the configuration, or did you just create a new > cluster with the default values? > > 4) What exactly is slower? Queries? Inserts? > > 5) Can you quantify the impact? Is it 2x slower? 100x slower? > > > regards > > > -- > Tomas Vondra > EnterpriseDB: http://www.enterprisedb.com > The Enterprise PostgreSQL Company >
