| From: | "Markus Bertheau" <mbertheau(dot)pg(at)googlemail(dot)com> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "Martijn van Oosterhout" <kleptog(at)svana(dot)org>, "Dawid Kuroczko" <qnex42(at)gmail(dot)com>, "Ron Mayer" <rm_pg(at)cheapcomplexdevices(dot)com>, Decibel! <decibel(at)decibel(dot)org>, "Simon Riggs" <simon(at)2ndquadrant(dot)com>, "Jeff Davis" <pgsql(at)j-davis(dot)com>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com>, "Pg Hackers" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: configurability of OOM killer |
| Date: | 2008-02-08 02:45:37 |
| Message-ID: | 684362e10802071845o3f4dd58auf1398c5aab40a56c@mail.gmail.com |
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| Lists: | pgsql-hackers |
2008/2/8, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:
>
> Martijn van Oosterhout <kleptog(at)svana(dot)org> writes:
> > On Thu, Feb 07, 2008 at 08:22:42PM +0100, Dawid Kuroczko wrote:
> >> ....while we are at it -- one feature would be great for 8.4, an
> >> ability to shange shared buffers size "on the fly".
>
> > Shared memory segments can't be resized... There's not even a kernel
> > API to do it.
>
> Even if there were, it seems unlikely that we could reallocate shared
> memory without stopping all active transactions, so it'd be barely less
> invasive than a postmaster restart anyhow.
What about allowing shared_buffers to be only greater than it was at server
start and allocating the extra shared_buffers in one or more additional shm
segments?
Markus
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