| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Bernd Helmle <mailings(at)oopsware(dot)de> |
| Cc: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Wait free LW_SHARED acquisition |
| Date: | 2013-09-30 17:00:06 |
| Message-ID: | 20130930170006.GC30125@awork2.anarazel.de |
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| Thread: | |
| Lists: | pgsql-hackers |
Hi,
On 2013-09-30 18:54:11 +0200, Bernd Helmle wrote:
> HEAD (default):
>
> tps = 181738.607247 (including connections establishing)
> tps = 182665.993063 (excluding connections establishing)
>
> HEAD (padding + 16 partitions + your lwlocks patch applied):
>
> tps = 269328.259833 (including connections establishing)
> tps = 270685.666091 (excluding connections establishing)
>
> So, still an improvement but far away from what you got. Do you have some
> other tweaks in your setup?
The only relevant setting changed was -c shared_buffers=1GB, no other
patches applied. At which scale did you pgbench -i?
Your processors are a different microarchitecture, I guess that could
also explain some of the difference. Any chance you could run a perf record -ag
(after compiling with -fno-omit-frame-pointer)?
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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