From: | Mikael Kjellström <mikael(dot)kjellstrom(at)mksoft(dot)nu> |
---|---|
To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
Subject: | Re: sidewinder has one failure |
Date: | 2020-01-04 00:21:13 |
Message-ID: | 8e5fceb1-85b1-41dc-dcfd-e3e1454d2879@mksoft.nu |
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On 2020-01-04 01:15, Tom Lane wrote:
> =?UTF-8?Q?Mikael_Kjellstr=c3=b6m?= <mikael(dot)kjellstrom(at)mksoft(dot)nu> writes:
>> I think Tom Lane found the "problem". It has to do with the semaphores
>> taking up FD's.
>
> Hm, no, because:
Yes, saw that after I posted my answer.
>> Sure. I compiled pgsql 12 and this is the complete logfile after
>> starting up the server the first time with log_min_messages=debug2:
>> 2020-01-04 01:03:14.492 CET [14906] DEBUG: max_safe_fds = 984,
>> usable_fds = 1000, already_open = 6
>
> That's pretty much the same thing we see on most other platforms.
> Plus your configure log shows that SysV semaphores were selected,
> and those don't eat FDs.
Yes, it looks "normal".
> Apparently, in the environment of that TAP test, the server has more
> open FDs at this point than it does when running "normally". I have
> no idea what the additional FDs might be.
Well it's running under cron if that makes a difference and what is the
TAP-test using? perl?
/Mikael
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