Re: semop hanging - Postgres 9.4.4

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