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Folder used to store PID files


--pid-root path


--pid-root path specifies the folder used to store PID files. PID files record the system-specific process identifiers for all processes associated with the server instance. This includes:

  • — The process identifiers of the server's head process.

  • — The process identifiers of each worker process N.

In some circumstances, may be present when is not. This is a strong indication that worker_1 crashed and was restarted automatically. You can confirm this by checking the main log file.

The format of these files is a single decimal integer, the process identifier.



Path to the folder used to store PID files relative to the server instance's root folder.


Store PID files in the pid folder.

--pid-root ./pid