Re: How much memory in 32 bits Architecture to Shared Buffers is Possible

From: "Marcelo Costa" <marcelojscosta(at)gmail(dot)com>
To: "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: How much memory in 32 bits Architecture to Shared Buffers is Possible
Date: 2006-10-02 16:31:51
Message-ID: c13f2d590610020931x1b8a084bp45e137b838872493@mail.gmail.com
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Yes, my system is DEBIAN SARGE 3.0

thanks,

Marcelo

2006/10/2, Joshua D. Drake <jd(at)commandprompt(dot)com>:
>
> Marcelo Costa wrote:
> > Hi, to all!
> >
> > Recently i try increasing the memory values of shared buffers on one
> > IBM xseries 255 (Quad XEON 2.8, 8 GB RAM, 2 disk SCSI 36 GB(Raid 1), 1
> > Storage.
>
> You haven't specified your OS so I am going to assume Linux.
>
> > Where I start up the cluster very messages of configurations errors on
> > shared_memmory and SHMMAX look up. I try change the values of
> > shared_memory, max_connections and effective_cache_size and large the
> > size of SHMALL and SHMMAX to use 4294967296 (4096 MB) but the cluster
> > don't start.
>
> You have to edit your sysctl.conf see:
>
> http://www.postgresql.org/docs/8.1/static/runtime.html
>
> I *think* (I would have to double check) the limit for shared memory on
> linux 32bit is 2 gig. Possibly 2 gig per CPU I don't recall. I run all
> 64bit now.
>
> Sincerely,
>
> Joshua D. Drake
>
>
>
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>
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>

--
Marcelo Costa

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