Re: Pre-allocation of shared memory ... - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: Pre-allocation of shared memory ...
Date
Msg-id 200306130210.h5D2A2n27763@candle.pha.pa.us
Whole thread Raw
In response to Re: Pre-allocation of shared memory ...  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Pre-allocation of shared memory ...
Re: Pre-allocation of shared memory ...
List pgsql-hackers
Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > You have to love that swap + 1/2 ram option --- when you need four
> > possible options, there is something wrong with your approach.  :-)
> 
> I'm still wondering what the "no overcommit handling" option does,
> exactly.

I assume it does no kills, and allows you to commit until you run of of
swap and hang.  This might be the BSD 4.4 behavior, actually.

It is bad to hang the system, but if it reports swap failure, at least
the admin knows why it failed, rather than killing random processes.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
359-1001+  If your life is a hard drive,     |  13 Roberts Road +  Christ can be your backup.        |  Newtown Square,
Pennsylvania19073
 


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