On Sun, Jan 27, 2019 at 01:09:16PM +0530, Saurabh Nanda wrote: > It seems that PGOPTIONS="-c synchronous_commit=off" has a significant > impact. However, I still can not understand why the TPS for the optimised > case is LOWER than the default for higher concurrency levels! Do you know which of the settings is causing lower TPS ? I suggest to check shared_buffers. If you haven't done it, disabling THP and KSM can resolve performance issues, esp. with large RAM like shared_buffers, at least with older kernels. https://www.postgresql.org/message-id/20170718180152.GE17566%40telsasoft.com Justin
