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From: "Simon Riggs" <simon(at)2ndquadrant(dot)com>
To: <pgsql-patches(at)postgresql(dot)org>
Subject: scan_recycle_buffers
Date: 2007-03-09 19:24:13
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackerspgsql-patches
Patch to implement buffer cache recycling for scans, as being discussed
on pgsql-hackers.

Applies cleanly to cvstip, passes make installcheck when used by default
for all SeqScans. Tested with scan_recycle_buffers = 1,4,8,16

Should be regarded as WIP. Presumably there are some failure conditions
that require the buffer to be reset; these have not yet been considered.

No docs.

SET scan_recyle_buffers = N
default = 0

8 <= N <= 64 would yield benefits according to earlier results

  Simon Riggs             

Attachment: scan_recycle_buffers.v1.patch
Description: text/x-patch (12.7 KB)


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