PostgreSQL uses more memory on 6.1?

Marshall Pierce mbp at
Tue May 23 13:37:35 PDT 2006

On May 23, 2006, at 1:31 PM, Kirk Strauser wrote:

> I just upgraded from 6-STABLE as of 2006-02-18 to 6-STABLE as of  
> 2006-05-21,
> and was surprised to find that PostgreSQL wouldn't start because it
> couldn't allocate enough shared memory.  Thing is, I didn't make a  
> single
> hardware change during the reboot and didn't upgrade any ports on the
> machine.
> My emergency fix was to edit postgresql.conf to change  
> shared_buffers from
> 8192 to 2048.  Unfortunately, that seems to be hurting performance  
> - I'm
> getting annoying deadlocks at 4AM whenever multiple daemons start  
> their
> overnight batch runs.
> Has anyone else seen this behavior when upgrading from 6.0 to 6.1?   
> Any
> ideas for a fix?
> I apologize for not having a logfiles, but I was pretty much in a  
> panic to
> get it back up and running ASAP and didn't think about it until it  
> was too
> late.
> -- 
> Kirk Strauser

You need to adjust the shared memory segments allowed by the kernel; see
server for
what to add to your kernel config. Most likely, you forgot to move  
over your
kernel customizations to your new kernel...?


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