Re: Postgresql background writer and checkpointer memory utilization in Linux server

Dear Tom,

This issue is occurred in postgresql 11 version only not in postgresql 9.4
and also in postgresql Linux environments I have seen when there is no
transaction running database background processes are not going to occupies
the server memory.

Regards,
Mohammed Afsar

On Tue, Aug 11, 2020, 9:10 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Mohammed Afsar <mohammed(dot)afsar7799(at)gmail(dot)com> writes:
> > Thanks for response,the exact issue which am facing is when there is no
> > transaction queries are happening in database checkpointer and background
> > writer is continuously utilizing memory from server.
>
> That sounds like complete nonsense. Those processes don't execute
> queries. It's true that they'll continue to do I/O work for some
> time after queries have executed in other processes, but that's normal.
>
> I say again that you haven't offered any evidence of having a problem
> to solve. If you don't want the database to be consuming any cycles
> at all, then you should shut it down. But if you want it to do useful
> work, it's designed to spread out that work, not necessarily to do it
> all before a query returns results to the client.
>
> regards, tom lane
>