Re: Add test of pg_prewarm extenion - Mailing list pgsql-hackers

From Julien Rouhaud
Subject Re: Add test of pg_prewarm extenion
Date
Msg-id CAOBaU_bhZuUQ1TZW4iRdxepbpaxrvsQnwXS87ZZN0FFCQkhK8w@mail.gmail.com
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In response to Re: Add test of pg_prewarm extenion  (Dong Wook Lee <sh95119@gmail.com>)
Responses Re: Add test of pg_prewarm extenion
Re: Add test of pg_prewarm extenion
List pgsql-hackers
On Mon, Aug 1, 2022 at 5:16 PM Dong Wook Lee <sh95119@gmail.com> wrote:
>
> > Keep in mind also that the logfile accumulates over stops and
> > restarts.  As you've coded this test, you don't know which DB start
> > emitted the matching line, so the test proves a lot less than it
> > ought to.
> >
> > I wonder also about race conditions.  On fast machines, or those
> > with weird schedulers, the test script might reach slurp_file
> > before autoprewarm has had a chance to emit the log entry you want.
>
> I have no idea how to deal with race conditions.
> Does anybody know how to deal with this?

Couldn't you use $node->wait_for_log() instead?



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