Não é possível mudar o usuário para o postgres.
As configurações do ullimit para o usuário postgres são definidas com limites razoáveis. Nós não estamos atingindo max.
Nenhum erro em / var / log / messages.
Erro:
BETA -bash-4.2# sudo su - postgres
su: /bin/bash: Resource temporarily unavailable
Configurações:
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 para o processo 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#
Configurações do 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
Depois de reiniciar o postgres, consegui entrar.
Utilitário de recursos para o usuário 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#