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Remove paragraph about Linux OOM killer and fork(). Instead link to 

article about OOM.
This commit is contained in:
Bruce Momjian 2007-12-22 05:13:03 +00:00
parent cda598e184
commit 25e9b0e36f
1 changed files with 6 additions and 9 deletions
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15
doc/src/sgml/runtime.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.392 2007/12/17 14:00:52 momjian Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/runtime.sgml,v 1.393 2007/12/22 05:13:03 momjian Exp $ -->
<chapter Id="runtime"> <chapter Id="runtime">
<title>Operating System Environment</title> <title>Operating System Environment</title>
@ -1256,14 +1256,11 @@ Out of Memory: Killed process 12345 (postgres).
<para> <para>
On Linux 2.6 and later, an additional measure is to modify the On Linux 2.6 and later, an additional measure is to modify the
kernel's behavior so that it will not <quote>overcommit</> memory. kernel's behavior so that it will not <quote>overcommit</> memory.
Although this setting will not prevent the OOM killer from Although this setting will not prevent the <ulink
being invoked altogether, it will lower the chances significantly and url="http://lwn.net/Articles/104179/">OOM killer</> from being invoked
will therefore lead to more robust system behavior. (It might also altogether, it will lower the chances significantly and will therefore
cause <function>fork()</> to fail when the machine appears to have lead to more robust system behavior. This is done by selecting strict
available memory but it is actually reserved overcommit mode via <command>sysctl</command>:
to other applications with careless memory allocation.) This
is done by selecting strict overcommit mode via
<command>sysctl</command>:
<programlisting> <programlisting>
sysctl -w vm.overcommit_memory=2 sysctl -w vm.overcommit_memory=2
</programlisting> </programlisting>