Re: Problems setting shared_buffers to large value

["Joshua D. Drake" <jd@commandprompt.com>]

Hello,

What operating system?

Sincerely,

Joshua D. Drake

Barry L. Geipel wrote:

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Hi all,

 

I am running postgres 7.4.2 on a Dual processor Opteron with 16GB of ram. I want to set shared_buffers to a large value, but I am running into startup problems.

 

I have set my kernel SHMMAX and SHMALL to 12GB.

 

When I set shared_buffers to a value which puts the total shared memory usage over 1GB, my postgres server fails to start. Unfortunatly, I also cannot seem to get any logfile output out of my system (perhaps another question).

 

Are there any hardcoded max values for shared_buffers? I noticed in the code that a uint32 is used for the page size which would mean a 4GB max. This is failing at much lower values.

 

Sorry that I do not have a logfile output. Perhaps someone could help me turn my logfile on. I am passing –l logfile at startup, but my logfile remains empty.

 

Thanks in advance

 

Barry

(barry@GeipelNet.com

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