| From: | "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com> |
|---|---|
| To: | Kaijiang Chen <chenkaijiang(at)gmail(dot)com>, "pgsql-performance(at)postgresql(dot)org" <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Do work_mem and shared buffers have 1g or 2g limit on 64 bit linux? |
| Date: | 2015-06-13 17:43:04 |
| Message-ID: | 557C6BA8.7030805@commandprompt.com |
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| Thread: | |
| Lists: | pgsql-performance |
On 06/13/2015 10:27 AM, Kaijiang Chen wrote:
> Hi, I am using postgresql 9.2.10 on centos 6.2, 64 bit version. The
> server has 512 GB mem.
>
> The jobs are mainly OLAP like. So I need larger work_mem and shared
> buffers. From the source code, there is a constant MaxAllocSize==1GB.
> So, I wonder whether work_mem and shared buffers can exceed 2GB in the
> 64 bit Linux server?
Shared Buffers is not limited.
Work_mem IIRC can go past 2GB but has never been proven to be effective
after that.
It does depend on the version you are running.
JD
>
> Thanks and regards,
> Kaijiang
>
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