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RedHat 9 (Linux i386) - man page for ipcclean (redhat section 1)

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IPCCLEAN(1)			  PostgreSQL Server Applications		      IPCCLEAN(1)

       ipcclean - remove shared memory and semaphores from an aborted PostgreSQL server


       ipcclean  removes all shared memory segments and semaphore sets owned by the current user.
       It is intended to be used for cleaning up after	a  crashed  PostgreSQL	server	(postmas-
       ter(1)).  Note that immediately restarting the server will also clean up shared memory and
       semaphores, so this command is of little real utility.

       Only the database administrator should execute this program as it can cause bizarre behav-
       ior (i.e., crashes) if run during multiuser execution. If this command is executed while a
       postmaster is running, the shared memory and semaphores allocated by the  postmaster  will
       be  deleted.  This will result in a general failure of the backend servers started by that

       This script is a hack, but in the many years since it was written, no one has come up with
       an  equally  effective  and  portable  solution.  Since the postmaster can now clean up by
       itself, it is unlikely that ipcclean will be improved upon in the future.

       The script makes assumption about the format of output of the ipcs utility which  may  not
       be true across different operating systems.  Therefore, it may not work on your particular

Application				    2002-11-22				      IPCCLEAN(1)
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