On Sun, Nov 4, 2012 at 7:23 PM, Dong Ye <yed@xxxxxxxxxx> wrote: >> You are using prepared statements, this makes me think that this >> regression might be due to support for parameter specific plans for >> prepared statements. [1] Can you run the test on both versions without >> prepared statements and see if the regressions remains. > > Without prepare statement, we got 48837.33 avg notpm with 9.1.6 and 43264.54 avg notpm with 9.2.1. > notps over time shows the slowdown of 9.2.1 is evident during the entire course of the run. > Their profiles are posted on http://pgsql.privatepaste.com/b770f72967 (9.1.6) and http://pgsql.privatepaste.com/6fa8b7f174 (9.2.1). You know... it does look as if 9.2.1 is generating a lot more pressure into the memory allocator (AllocSetAlloc notably higher). -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
