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Re: crash-safe visibility map, take three - Mailing list pgsql-hackers

From Rob Wultsch
Subject Re: crash-safe visibility map, take three
Date
Msg-id AANLkTinQeiV9HhkFDOUB=uewdNR4TryOLBieJ3x28PAD@mail.gmail.com
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In response to crash-safe visibility map, take three  (Robert Haas <robertmhaas@gmail.com>)
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On Mon, Nov 29, 2010 at 9:57 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> 1. Pin each visibility map page.  If any VM_BECOMING_ALL_VISIBLE bits
> are set, take the exclusive content lock for long enough to clear
> them.

I wonder what the performance hit will be to workloads with contention
and if this feature should be optional.

--
Rob Wultsch
wultsch@gmail.com

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