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Re: shared_buffers > 284263 on OS X

From: Guido Neitzer <lists(at)event-s(dot)net>
To: AgentM <agentm(at)themactionfaction(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: shared_buffers > 284263 on OS X
Date: 2006-11-27 16:21:37
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Lists: pgsql-performance
Am 27.11.2006 um 17:05 schrieb AgentM:

> There is a known unfortunate limitation on Darwin for SysV shared  
> memory which, incidentally, does not afflict POSIX or mmap'd shared  
> memory.

Hmmm. The article from Chris you have linked does not mention the  
size of the mem segment you can allocate. Nevertheless - if you  
compile a 32 Bit binary, there is the limitation Brian mentioned.

You can easily simulate this with a small C program that allocates  
memory - if you compile it as 64 Bit binary - not problem, if you  
compile as 32 Bit - crash.


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