Re: desktop heap usage in windows

On Mon, Apr 5, 2010 at 23:45, John R Pierce <pierce(at)hogranch(dot)com> wrote:
> Magnus Hagander wrote:
>>
>> No, there's a problem with the Desktop Heap getting exhausted because
>> of system DLLs that allocate from it whenever they are loaded into a
>> process. It's in the Windows FAQ on wiki.postgresql.org - IIRC it's
>> right at the bottom.
>>
>> And yes, we still have the problem - it's a Windows problem, really,
>> not a PostgreSQL problem. It simply can't deal with many processes the
>> way the system DLLs are built. The exact limit varies between
>> installations - likely due to third party DLLs being loaded, like AV
>> and FW software.
>>
>> It may be that this is actually not a problem with the 64-bit version
>> of 9.0. I haven't tried that - probably should.
>>
>
> k, so the FAQ entry here [1]  references the MSKB article [2] which, under
> Cause 2, talks about the SharedSection in the registry key [3]
>
> Presumably, tis the 3rd value, the 512, thats used by non-interactive
> sessions, thats the one that needs boosting?
>
> fwiw, on my win7 pro 64bit desktop, that reads...
>
>   %SystemRoot%\system32\csrss.exe ObjectDirectory=\Windows
> SharedSection=1024,20480,768
>       Windows=On SubSystemType=Windows ServerDll=basesrv,1
> ServerDll=winsrv:UserServerDllInitialization,3
>       ServerDll=winsrv:ConServerDllInitialization,2 ServerDll=sxssrv,4
> ProfileControl=Off
>       MaxRequestThreads=16
>
> which is larger (768) than the value shown in the KB article [2] (512)

Hmm. I was hoping for orders-of-magniture larger though, that would
remove the problem completely. This seems to just push it off a little
bit more (assuming it makes a difference, that should probably be
tested and not just assumed)

--
Magnus Hagander
Me: http://www.hagander.net/
Work: http://www.redpill-linpro.com/