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Commit3c59a9e

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Bring references to ipcclean in sync with reality.
1 parent309401a commit3c59a9e

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2 files changed

+28
-27
lines changed

2 files changed

+28
-27
lines changed

‎doc/src/sgml/ref/ipcclean.sgml

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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/Attic/ipcclean.sgml,v 1.4 2001/09/03 12:57:50 petere Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/Attic/ipcclean.sgml,v 1.5 2001/09/04 00:22:34 petere Exp $
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Postgres documentation
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-->
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@@ -28,35 +28,36 @@ Postgres documentation
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<refsect1 id="R1-APP-IPCCLEAN-1">
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<title>Description</title>
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<para>
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<application>ipcclean</application>
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cleans up shared memory and semaphore space from aborted backends by
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deleting all instances owned by user <literal>postgres</literal>.
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Only the DBA
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should execute this program as it can cause bizarre behavior (i.e.,
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crashes) if run during multi-user execution. This program should be
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executed if messages such as
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<computeroutput>
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semget: No space left on device
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</computeroutput>
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are encountered when starting up the
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<application>postmaster</application> or the backend server.
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<command>ipcclean</command> removes all shared memory segments and
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semaphore sets owned by the current user. It is intended to be
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used for cleaning up after a crashed
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<productname>PostgreSQL</productname> server (<xref
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linkend="app-postmaster">). Note that immediately restarting the
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server will also clean up shared memory and semaphores, so this
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command is of little real utility.
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</para>
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<para>
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If this command is executed while <application>postmaster</application>
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is running, the shared memory and semaphores allocated by the
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<application>postmaster</application>
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will be deleted. This will result in a general failure of the
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backend servers started by that
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Only the database administrator should execute this program as it
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can cause bizarre behavior (i.e., crashes) if run during multiuser
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execution. If this command is executed while a
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<application>postmaster</application> is running, the shared memory
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and semaphores allocated by the
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<application>postmaster</application> will be deleted. This will
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result in a general failure of the backend servers started by that
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<application>postmaster</application>.
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</para>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>
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This script is a hack, but in the many years since it was written, no
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one has come up with an equally effective and portable solution.
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Suggestions are welcome.
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This script is a hack, but in the many years since it was written,
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no one has come up with an equally effective and portable solution.
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Since the <application>postmaster</application> can now clean up by
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itself, it is unlikely that <command>ipcclean</command> will be
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improved upon in the future.
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</para>
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<para>
@@ -66,6 +67,7 @@ semget: No space left on device
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Therefore, it may not work on your particular OS.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file

‎src/backend/storage/ipc/ipc.c

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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipc.c,v 1.67 2001/05/08 19:00:26 momjian Exp $
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* $Header: /cvsroot/pgsql/src/backend/storage/ipc/ipc.c,v 1.68 2001/09/0400:22:34 petere Exp $
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*
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* NOTES
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*
@@ -596,9 +596,8 @@ InternalIpcMemoryCreate(IpcMemoryKey memKey, uint32 size, int permission)
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"2. The requested shared memory segment was too small for your system.\n"
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" You need to lower the SHMMIN parameter in your kernel.\n\n"
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"3. The requested shared memory segment already exists but is of the\n"
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" wrong size. This is most likely the case if an old version of\n"
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" PostgreSQL crashed and didn't clean up. The `ipcclean' utility\n"
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" can be used to remedy this.\n\n"
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" wrong size. This can occur if some other application on your system\n"
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" is also using shared memory.\n\n"
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"The PostgreSQL Administrator's Guide contains more information about\n"
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"shared memory configuration.\n\n",
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size);

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