Re: Patch für MAP_HUGETLB for mmap() shared memory

From: Christian Kruse <cjk+postgres(at)defunct(dot)ch>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Patch für MAP_HUGETLB for mmap() shared memory
Date: 2012-10-30 19:18:18
Message-ID: 20121030191818.GF2330@achilles.local.defunct.ch
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Hi,

On 29/10/12 16:33, Tom Lane wrote:
> > I created a patch which implements MAP_HUGETLB for sysv shared memory segments
> > (PGSharedMemoryCreate). It is based on tests of Tom Lane and Andres Freund, I
> > added error handling, huge page size detection and a GUC variable.
>
> My recollection is we'd decided not to pursue that because of fears that
> it could make performance horribly worse on some platforms.

This is why I created a GUC for turning this feature off.

Greetings,
CK

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