linux-kernel - Re: Improve lseek scalability v3

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Message-ID: <20110916142319.GE7761@one.firstfloor.org>
Date:	Fri, 16 Sep 2011 16:23:19 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Andres Freund <andres@...razel.de>
Cc:	Matthew Wilcox <matthew@....cx>, Andi Kleen <andi@...stfloor.org>,
	viro@...iv.linux.org.uk, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Improve lseek scalability v3

> I sent an email containing benchmarks from Robert Haas regarding the Subject. 
> Looking at lkml.org I can't see it right now, Will recheck when I am at home.

I never saw that. Thanks for the data.

> You likely won't be able to see the bottlenecks with any of the released 
> postgres versions as there are bottlenecks fixed in HEAD that throttle way 
> before that.

FWIW we did some postgres testing on a 4 socket, but only with the heavily patched 
MOSBENCH version, which fixes various locking problems. Didn't run it with that
patchkit though.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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