su: /bin/bash: ресурс временно недоступен

Невозможно переключить пользователя на postgres.

Настройки Ulimit для пользователя postgres установлены с разумными ограничениями. Мы не бьем макс.

Нет ошибок в /var/log/messages.

Ошибка:

BETA -bash-4.2# sudo su - postgres
su: /bin/bash: Resource temporarily unavailable

Настройки:

BETA -bash-4.2# ps -auxww | grep -i postgr | wc -l
503
BETA -bash-4.2# lsof | grep -i postgr | wc -l
35225
BETA -bash-4.2# 

Ulimit для процесса postgres.

BETA -bash-4.2# cat /proc/26230/limits 
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        0                    unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             256580               256580               processes 
Max open files            1024                 4096                 files     
Max locked memory         65536                65536                bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       256580               256580               signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us

Netstat

BETA -bash-4.2# netstat -plan | grep -i post | grep ESTABLISHED | wc -l
496
BETA -bash-4.2# 

Настройки Ulimit

BETA -bash-4.2# cat /etc/security/limits.d/postgres_limits.conf 
# Limits settings for postgres

postgres soft nofile 4096
postgres hard nofile 4096

postgres soft nproc 400
postgres hard nproc 400

После перезапуска postgres я смог войти.

Ресурс утилитой для пользователя postgres.

BETA -bash-4.2# netstat -plan | grep -i post | grep ESTABLISHED | wc -l
1
BETA -bash-4.2# 

BETA -bash-4.2# lsof | grep -i postgr | wc -l
309
BETA -bash-4.2# ps -auxww | grep -i postgr | wc -l
8
BETA -bash-4.2#