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Re: Question on memory management sysv/posix on Linux - Mailing list pgsql-general

From Tom Lane
Subject Re: Question on memory management sysv/posix on Linux
Date
Msg-id 15092.1455719938@sss.pgh.pa.us
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In response to Question on memory management sysv/posix on Linux  (Daniel Westermann <daniel.westermann@dbi-services.com>)
List pgsql-general
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Daniel Westermann <daniel.westermann@dbi-services.com> writes:
> ls -la /dev/shm
> total 4
> drwxrwxrwt 2 root root 60 Feb 17 11:19 .
> drwxr-xr-x 18 root root 3100 Feb 17 09:36 ..
> -rw------- 1 postgres postgres 2316 Feb 17 11:19 PostgreSQL.1804289383

> Question: Why is this file only 2316 bytes?

It holds a DSM control header, nothing more.  If you were actually doing
anything with dynamic shared memory, you'd see more such files.

            regards, tom lane

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