On Wed, Jul 4, 2018 at 12:10 PM, Andres Freund <and...@anarazel.de> wrote: > On 2018-07-03 19:44:21 -0400, Alvaro Herrera wrote: >> On 2018-Jul-04, Thomas Munro wrote: >> > PerformAuthentication(MyProcPort); >> > + AcceptInvalidationMessages(); >> > InitializeSessionUserId(username, useroid); >> > >> > Any objections? >> >> Is there a measurable performance overhead to this change? > > I can't see it being relevant here. We accept inval message in plenty > other places, and in comparison to session startup it should be just > about inmeasurable.
Yeah, using "pgbench -c 8 -j 8 -T 60 --connect -S -M prepared postgres" I wasn't able to measure a significant difference on my laptop. The performance was equally terrible, at around 940 TPS +/- 10 including connection time. Adding to open commitfest. -- Thomas Munro http://www.enterprisedb.com
0001-Call-AcceptInvalidationMessages-after-authenticating.patch
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