On Thu, Feb 22, 2018 at 7:55 PM, Robert Haas <robertmh...@gmail.com> wrote: > On Wed, Feb 21, 2018 at 10:03 PM, Mithun Cy <mithun...@enterprisedb.com> > wrote: >> seeing futex in the call stack andres suggested that following commit could >> be the reason for regression >> >> commit ecb0d20a9d2e09b7112d3b192047f711f9ff7e59 >> Author: Tom Lane <t...@sss.pgh.pa.us> >> Date: 2016-10-09 18:03:45 -0400 >> >> Use unnamed POSIX semaphores, if available, on Linux and FreeBSD. >> >> Commenting out same in src/template/linux I did run the benchmark tests >> again >> performance improved from 26871.567326 to 34286.620251 (both median of 3 >> TPS). > > Hmm. So that commit might not have been the greatest idea. >
It appears so. I think we should do something about it as the regression is quite noticeable. -- With Regards, Amit Kapila. EnterpriseDB: http://www.enterprisedb.com
