Re: Minor optimisation of XLogInsert()

From: Robert Haas <robertmhaas(at)gmail(dot)com>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Minor optimisation of XLogInsert()
Date: 2011-11-16 14:33:16
Message-ID: CA+TgmoaWTx-SpvafS9XN_EWCfha9CnBxgfob26Z7Sk9FfFEG0Q@mail.gmail.com
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On Tue, Nov 15, 2011 at 6:24 AM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> Patch adds cacheline padding around parts of XLogCtl.
>
> Idea from way back, but never got performance tested in a situation
> where WALInsertLock was the bottleneck.
>
> So this is speculative, in need of testing to investigate value.

I kicked off a round of benchmarking around this. I'll post results
in a few hours when the run finishes.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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