IPCCLEAN(1) PostgreSQL Server Applications IPCCLEAN(1)
ipcclean - remove shared memory and semaphores from a failed PostgreSQL
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 (postmaster(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 behavior (i.e., crashes) if run during multiuser execu-
tion. If this command is executed while a server is running, the shared
memory and semaphores allocated by that server will be deleted, which
would have rather severe consequences for that server.
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 assumptions about the output format of the ipcs util-
ity which may not be true across different operating systems. There-
fore, it may not work on your particular OS. It’s wise to look at the
script before trying it.
Application 2005-01-17 IPCCLEAN(1)
Man(1) output converted with