The amount of processes is not reach the soft limiation of nproc via the output of ps command , but system reports "Resource temporarily unavailable".

Solution Verified - Updated -

Issue

  • Why the system reports "Resource temporarily unavailable", even if the amount of processes from ps command does not hit the soft limits of nproc (max number of processes) ?.
  • What is real UID and effective UID ?

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

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