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[closed] Linux PID recycling


Is there a Linux policy regarding the recycling of spent PIDs? I mean, how long after a PId has been used will it be used again?

Asked by Cygnus

Solution #1

PIDs will increase to a system-dependent limit as new processes fork in, then wrap around. Before this wrap-around, the kernel will not reuse a PID.

/proc/sys/kernel/pid max is the limit (maximum number of pids). According to the instruction manual:

Answered by cnicutar

Solution #2

This should explain your query; it looks that when the PIDs run out, it will recycle them, ignoring the ones that are still assigned.

Answered by Osmium USA

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