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Add note about patch from sun that improves performance on Solaris.

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(Thanks Joe Meslovich).
(This used to be commit 1db51176f4a6c676d041abd47db6c4026ded30f1)
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Jelmer Vernooij 2003-04-07 13:46:13 +00:00
parent dfbe783635
commit c6ffda4f76
1 changed files with 34 additions and 1 deletions
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docs/docbook/projdoc/Portability.sgml
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@ -180,9 +180,42 @@ Corrective Action: Delete the entry after the word loopback
<title>Sequential Read Ahead</title>
<!-- From an email by William Jojo <jojowil@hvcc.edu> -->
<para>
Disabling Sequential Read Ahead using "vmtune -r 0" improves
Disabling Sequential Read Ahead using <userinput>vmtune -r 0</userinput> improves
samba performance significally.
</para>
</sect2>
</sect1>
<sect1>
<title>Solaris</title>
<para>Some people have been experiencing problems with F_SETLKW64/fcntl
when running samba on solaris. The built in file locking mechanism was
not scalable. Performance would degrade to the point where processes would
get into loops of trying to lock a file. It woul try a lock, then fail,
then try again. The lock attempt was failing before the grant was
occurring. So the visible manifestation of this would be a handful of
processes stealing all of the CPU, and when they were trussed they would
be stuck if F_SETLKW64 loops.
</para>
<para>
Sun released patches for Solaris 2.6, 8, and 9. The patch for Solaris 7
has not been released yet.
</para>
<para>
The patch revision for 2.6 is 105181-34
for 8 is 108528-19
and for 9 is 112233-04
</para>
<para>
After the install of these patches it is recommended to reconfigure
and rebuild samba.
</para>
<para>Thanks to Joe Meslovich for reporting</para>
</sect1>
</chapter>