Re: checkpoint process use too much memory

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Thanks Tom and Alvaro. I will upgrade it to 10.13 first. 
James


From: Tom Lane <tgl@xxxxxxxxxxxxx>
Sent: Monday, July 20, 2020 18:34
To: jian xu <jamesxu@xxxxxxxxxxx>
Cc: MichaelDBA <MichaelDBA@xxxxxxxxxxx>; Scott Ribe <scott_ribe@xxxxxxxxxxxxxxxx>; Laurenz Albe <laurenz.albe@xxxxxxxxxxx>; pgsql-admin@xxxxxxxxxxxxxx <pgsql-admin@xxxxxxxxxxxxxx>
Subject: Re: checkpoint process use too much memory
 
jian xu <jamesxu@xxxxxxxxxxx> writes:
>       we are seeing this issue again, the checkpoint process is eating up all the memory,
> based on the htop, the checkpointer process has
> VIRT: 103G
> RES: 103G
> SHR: 4099M

hmmm ...

> my pg version is 10.3 ,

Really the *first* thing you ought to do is update to current (10.13)
and see if the problem is still there.  But if it is, maybe collecting
a memory context map in that process would be informative:

https://wiki.postgresql.org/wiki/Developer_FAQ#Examining_backend_memory_use

Note you may need a debug build for that recipe to work.

                        regards, tom lane

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