On Thu, Sep 18, 2014 at 4:58 AM, Mkrtchyan, Tigran <tigran.mkrtchyan@xxxxxxx> wrote: > > 9.3.5: > 0.035940 END; > > > 9.4beta2: > 0.957854 END; time being spent on 'END' is definitely suggesting i/o related issues. This is making me very skeptical that postgres is the source of the problem. I also thing synchronous_commit is not set properly on the new instance (or possibly there is a bug or some such). Can you verify via: select * from pg_settings where name = 'synchronous_commit'; on both servers? What is iowait? For pci-e SSD, these drives don't seem very fast... merlin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
