Re: Repeating autovacuum

> On 8 Apr 2017, at 01:53, David G. Johnston <david(dot)g(dot)johnston(at)gmail(dot)com> wrote:
>
>> On Fri, Apr 7, 2017 at 3:35 PM, Ertan Küçükoğlu <ertan(dot)kucukoglu(at)1nar(dot)com(dot)tr> wrote:
>
>> No autovacuum parameters are changed or used. They are all remarked as in
>> default config file.
>>
>> I wonder if that is a normal behavior as system is idle.
>
> ​See "autovacuum_naptime (integer)"
>
> https://www.postgresql.org/docs/current/static/runtime-config-autovacuum.html
>
> Its "auto" vacuum which means it runs (nearly) continuously looking for things to do.
>
> I suppose that in theory it could operate in a kind of "wait/notify" mode where every DDL against the database wakes the daemon otherwise it stays asleep. I recall some work being done a number of years back on making the system more energy efficient during no-activity periods - but there are trade-offs to consider here for which I am not up-to-speed on the specifics.
>
> It would be interesting to see the timestamps on those log entries...
>
> David J.
>
I don't see any timestamp in the log. I myself wanted that, too. Do I need to turn some switch on?

Ertan Küçükoğlu