IPCCLEAN(UNIX)

NAME
       ipcclean  -  clean  up  shared  memory and semaphores from
       aborted backends

SYNOPSIS
       ipcclean

DESCRIPTION
       Ipcclean cleans up shared memory and semaphore space  from
       aborted  backends  by deleting all instances owned by user
       "postgres".  Only the DBA should execute this  program  as
       it  can cause bizarre behavior (i.e., crashes) if run dur-
       ing multi-user execution.  This program should be executed
       if  messages  such  as semget: No space left on device are
       encountered when starting up the postmaster or the backend
       server.

BUGS
       If this command is executed while a postmaster is running,
       the shared memory and semaphores allocated by the postmas-
       ter  will be deleted.  This will result in a general fail-
       ure of the backends servers started by that postmaster.

       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.  Suggestions are welcome.

       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 OS.