From: | Thomas Markus <t(dot)markus(at)proventis(dot)net> |
---|---|
To: | pgsql-performance(at)lists(dot)postgresql(dot)org |
Subject: | Re: Interpreting shared_buffers setting |
Date: | 2019-01-29 12:35:42 |
Message-ID: | 746a1925-c653-d805-dd83-560198f91523@proventis.net |
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Thread: | |
Lists: | pgsql-performance |
Hi,
check for blocksize (8k) as factor.
8k*131072=1G
regards
Thomas
Am 29.01.19 um 13:32 schrieb Bob Jolliffe:
> Excuse me if this is a silly question. I am trying to fiddle with
> shared_buffers setting on postgresql 10.6 on ubuntu 18.04 server.
>
> I have this at bottom of my config file:
> shared_buffers = 1GB
>
> Yet when I check the setting from pg_setting I see something quite different:
>
> postgres=# SELECT name, setting FROM pg_settings where name = 'shared_buffers';
> name | setting
> ----------------+---------
> shared_buffers | 131072
>
> Is this a question of units? It looks like 128M. Note when I change
> the setting to 2GB in conf file I see 262144 from pg_setting. I am
> now unsure what the actual shared_buffers allocation is. I cant see
> anything in the docs which tells me how to interpret the integer.
>
> Any clarification welcome.
>
> Regards
> Bob
>
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