118 lines
2.8 KiB
Plaintext
118 lines
2.8 KiB
Plaintext
<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/Attic/ipcclean.sgml,v 1.2 2000/10/05 19:48:18 momjian Exp $
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Postgres documentation
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-->
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<refentry id="APP-IPCCLEAN">
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<refmeta>
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<refentrytitle id="APP-IPCCLEAN-TITLE">
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<application>ipcclean</application>
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</refentrytitle>
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<refmiscinfo>Application</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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<application>ipcclean</application>
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</refname>
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<refpurpose>
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Clean up shared memory and semaphores from aborted backends
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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ipcclean
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</synopsis>
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<refsect2 id="R2-APP-IPCCLEAN-1">
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<refsect2info>
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<date>1999-07-20</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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None.
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</para>
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</refsect2>
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<refsect2 id="R2-APP-IPCCLEAN-2">
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<refsect2info>
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<date>1999-07-30</date>
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</refsect2info>
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<title>
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Outputs
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</title>
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<para>
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None.
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</para>
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</refsect2>
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</refsynopsisdiv>
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<refsect1 id="R1-APP-IPCCLEAN-1">
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<refsect1info>
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<date>1999-07-20</date>
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</refsect1info>
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<title>
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Description
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</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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</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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<application>postmaster</application>.
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</para>
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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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</para>
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<para>
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The script makes assumption about the format of output of the
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<application>ipcs</application>
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utility which may not be true across different operating systems.
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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
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Local variables:
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mode: sgml
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sgml-shorttag:t
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sgml-indent-step:1
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sgml-parent-document:nil
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sgml-default-dtd-file:"../reference.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:"/usr/lib/sgml/catalog"
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sgml-local-ecat-files:nil
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End:
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-->
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