Re: Move PinBuffer and UnpinBuffer to atomics

On 2016-04-01 10:35:18 +0200, Andres Freund wrote:
> On 2016-04-01 13:50:10 +0530, Dilip Kumar wrote:
> > I think it needs more number of runs.. After seeing this results I did not
> > run head+pinunpin,
> > 
> > Head 64 Client 128 Client
> > -----------------------------------------------------
> > Run1 434860 356945
> > Run2 275815 *275815*
> > Run3 437872 366560
> > Patch 64 Client 128 Client
> > -----------------------------------------------------
> > Run1 429520 372958
> > Run2 446249 *167189*
> > Run3 431066 381592
> > Patch+Pinunpin  64 Client 128 Client
> > ----------------------------------------------------------
> > Run1 338298 642535
> > Run2 406240 644187
> > Run3 595439 *285420 *
> 
> Could you describe the exact setup a bit more? Postgres settings,
> pgbench parameters, etc.
> 
> What's the size of BufferDesc after applying the patch?

One interesting thing to do would be to use -P1 during the test and see
how much the performance varies over time.

Greetings,

Andres Freund