On 10 May 2013 15:04, Merlin Moncure <[email protected]> wrote:

> right. hm,   I guess this is something to keep in mind if you start
> going down the path of 'keep frequently accessed buffers pinned for
> longer durations -- possibly even forever'.

Just to mention that this scenario effectively starves anybody wanting
a cleanup lock, which was the reason we put in logic to VACUUM to skip
busy pages.

We just need to extend that thought to page level cleanup also.

--
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services


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