Re: Design notes for BufMgrLock rewrite

From: Simon Riggs <simon(at)2ndquadrant(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Design notes for BufMgrLock rewrite
Date: 2005-02-21 23:07:29
Message-ID: 1109027249.3801.149.camel@localhost.localdomain
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On Mon, 2005-02-21 at 18:01 -0500, Tom Lane wrote:
> Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> > [I'm assuming that there are no system-wide locks held across I/Os, that
> > bit seems a bit unclear from the description]
>
> That's always been true and still is, so I didn't dwell on it. Only a
> per-buffer lock is held while doing either input or output.

[Me too, thats why its in brackets at the bottom.]

...but do you agree with my comments on the lack of scalability in cache
miss situations?

Best Regards, Simon Riggs

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