From: | Christian Kruse <christian(at)2ndQuadrant(dot)com> |
---|---|
To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: Wait free LW_SHARED acquisition |
Date: | 2014-02-04 19:39:04 |
Message-ID: | 20140204193904.GB1361@defunct.ch |
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Thread: | |
Lists: | pgsql-hackers |
Hi,
I'm doing some benchmarks regarding this problem: one set with
baseline and one set with your patch. Machine was a 32 core machine (4
CPUs with 8 cores), 252 gib RAM. Both versions have the type align
patch applied. pgbench-tools config:
SCALES="100"
SETCLIENTS="1 4 8 16 32 48 64 96 128"
SETTIMES=2
I added -M prepared to the pgbench call in the benchwarmer script.
The read-only tests are finished, I come to similiar results as yours:
<http://wwwtech.de/pg/benchmarks-lwlock-read-only/>
I think the small differences are caused by the fact that I use TCP
connections and not Unix domain sockets.
The results are pretty impressive… I will post the read-write results
as soon as they are finished.
Best regards,
--
Christian Kruse http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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