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Re: testing ProcArrayLock patches

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Pavan Deolasee" <pavan(dot)deolasee(at)gmail(dot)com>
Cc: "Robert Haas" <robertmhaas(at)gmail(dot)com>, <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: testing ProcArrayLock patches
Date: 2011-11-21 23:10:35
Message-ID: 4ECA860B020000250004334C@gw.wicourts.gov (view raw or flat)
Thread:
Lists: pgsql-hackers
Pavan Deolasee <pavan(dot)deolasee(at)gmail(dot)com> wrote:
 
> It will be a great help if you could spare few minutes to also
> test the patch to take out the frequently accessed PGPROC members
> to a different array. We are seeing good improvements on HPUX IA
> platform and the AMD Opteron and it will be interesting to know
> what happens on the Intel platform too.
 
For a read only comparison (which was run using the simple
protocol), using identical settings to the previous master run, but
with the PGPROC split patch:
 
m32 tps = 201738.209348 (including connections establishing)
p32 tps = 201620.966988 (including connections establishing)

m128 tps = 352159.631878 (including connections establishing)
p128 tps = 363998.703900 (including connections establishing)
 
Clearly a win at 128 clients; not at 32.
 
For updates:
 
sm32 tps = 27392.393850 (including connections establishing)
sp32 tps = 27995.784333 (including connections establishing) 
 
sm128 tps = 22261.902571 (including connections establishing)
sp128 tps = 23690.408272 (including connections establishing)
 
pm32 tps = 34983.352396 (including connections establishing)
pp32 tps = 36076.373389 (including connections establishing)
 
pm128 tps = 24164.441954 (including connections establishing)
pp128 tps = 27070.824588 (including connections establishing)
 
That's a pretty decisive win all around.
 
-Kevin

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