Date: Thu, 26 May 2022 18:35:28 -0500
From: Justin Pryzby <pryzby@telsasoft.com>
To: =?utf-8?B?5b6Q5b+X5a6H5b6Q?= <xuzhiyuster@gmail.com>
Cc: pgsql-performance@lists.postgresql.org
Subject: Re: How to monitor Postgres real memory usage
Message-ID: <20220526233528.GD19626@telsasoft.com>
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On Fri, May 27, 2022 at 01:39:15AM +0800, 徐志宇徐 wrote:
> Hi Justin
> 
>   Thanks for you explaination.
> 
>   > > What postgres version ?
>   > > How was it installed ?  From souce?  From a package ?
>   I am using Postgres 11.1 .It's installed by package.

This is quite old, and missing ~4 years of bugfixes.

What's the output of these commands?
tail /proc/sys/vm/overcommit_*
tail /proc/sys/vm/nr_*hugepages /proc/cmdline
cat /proc/meminfo
uname -a

-- 
Justin