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From: Michał Nowak <minowack@wp.pl>
To: pgsql-admin <pgsql-admin@postgresql.org>
Subject: Re: semop hanging - Postgres 9.4.4
Date: Wed, 16 Dec 2015 12:31:42 +0100
Message-ID: <56714b9e73a011.46114915@wp.pl> (raw)
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Hello,

> There is no zombi nor defunct process. Now i have 3 stucked processes.

When i try to pg_terminate_backend nothing happens:

strace:

semop(57802972, {{9, -1, 0}}, 1)        = 0
semop(57802972, {{9, -1, 0}}, 1)        = 0
select(0, NULL, NULL, NULL, {0, 1000})  = 0 (Timeout)
select(0, NULL, NULL, NULL, {0, 1000})  = 0 (Timeout)
semop(57802972, {{9, -1, 0}}, 1)        = 0
--- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=4431, si_uid=105} ---
rt_sigreturn()                          = 139718030872480
select(0, NULL, NULL, NULL, {0, 1000})  = 0 (Timeout)
semop(57802972, {{9, -1, 0}}, 1)        = 0
semop(57802972, {{9, -1, 0}}, 1)        = 0
select(0, NULL, NULL, NULL, {0, 1000})  = 0 (Timeout)
select(0, NULL, NULL, NULL, {0, 1000})  = 0 (Timeout)
select(0, NULL, NULL, NULL, {0, 1000})  = 0 (Timeout) 


Best Regards,
Michal




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