Re: Reducing power consumption on idle servers

From: Simon Riggs <simon(dot)riggs(at)enterprisedb(dot)com>
To: Thomas Munro <thomas(dot)munro(at)gmail(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Bharath Rupireddy <bharath(dot)rupireddyforpostgres(at)gmail(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Zheng Li <zhengli10(at)gmail(dot)com>, Jim Nasby <nasbyj(at)amazon(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Reducing power consumption on idle servers
Date: 2022-11-19 10:59:32
Message-ID: CANbhV-FsjnzVOQGBpQ589=nWuL1Ex0Ykn74Nh1hEjp2usZSR5g@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers

On Fri, 18 Nov 2022 at 20:26, Thomas Munro <thomas(dot)munro(at)gmail(dot)com> wrote:
>
> On Sat, Nov 19, 2022 at 7:54 AM Simon Riggs
> <simon(dot)riggs(at)enterprisedb(dot)com> wrote:
> > I agree. I can't see a reason to keep it anymore.
>
> + Use of <varname>promote_trigger_file</varname> is deprecated. If you're
>
> I think 'deprecated' usually implies that it still works but you
> should avoid it. I think you need something stronger.

Whisky? Or maybe just reword the sentence...

New version attached.

> > I'm nervous about not having any wakeup at all, but since we are
> > removing the parameter there is no other reason not to do as Andres
> > suggests.
>
> Why? If we're accidentally relying on this timeout for recovery to
> not hang in some situation, that's a bug waiting to be discovered and
> fixed and it won't be this patch's fault.
>
> > New version attached, which assumes that the SIGALRMs are silenced on
> > the other thread.
>
> I tested this + Bharath's v5 from the other thread. meson test
> passes, and tracing the recovery process shows that it is indeed,
> finally, completely idle. Huzzah!

Thanks for testing!

Finally completely idle? Good to achieve that.

--
Simon Riggs http://www.EnterpriseDB.com/

Attachment Content-Type Size
hibernate_startup.v9.patch application/octet-stream 6.8 KB

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Peter Eisentraut 2022-11-19 11:00:12 Re: Polyphase merge is obsolete
Previous Message Amit Kapila 2022-11-19 10:48:57 Re: Perform streaming logical transactions by background workers and parallel apply