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Re: Patch für MAP_HUGETLB for mmap() shared memory

Christian Kruse <cjk+postgres@defunct.ch>

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From: Christian Kruse <cjk+postgres@defunct.ch>
To: pgsql-hackers@postgresql.org
Date: 2012-10-30T19:18:18Z
Lists: pgsql-hackers 
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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