From: | Egor Rogov <e(dot)rogov(at)postgrespro(dot)ru> |
---|---|
To: | pgsql-docs(at)postgresql(dot)org |
Subject: | Re: Suspicious description of track_io_timing |
Date: | 2016-06-12 20:03:51 |
Message-ID: | 1465761831654-5907482.post@n5.nabble.com |
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Lists: | pgsql-docs |
Alexander Law wrote
> The following documentation comment has been logged on the website:
>
> Page:
> https://www.postgresql.org/docs/9.6/static/runtime-config-statistics.html
> Description:
>
> There is the following sentence in description of the track_io_timing
> parameter:
>
> I/O timing information is displayed in <xref
> linkend="pg-stat-database-view">, in the output of <xref
> linkend="sql-explain"> when the
> <literal>BUFFERS</> option is used, and
> by <xref linkend="pgstatstatements">.
>
> Is it correct? Shouldn't the TIMING option be mentioned there instead
> of
> BUFFERS?
Yes, it's correct. Track_io_timing parameter corresponds to the buffer
manager. With BUFFERS option EXPLAIN shows buffers usage; when
track_io_timing is on it also shows I/O read and write time.
Egor Rogov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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