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List:       kmail-devel
Subject:    [Bug 88467] New: Slow switching between folders under Solaris with
From:       Jeremy Rand <jeremy.rand () alcatel ! com>
Date:       2004-08-30 19:00:19
Message-ID: 20040830190019.14308.qmail () ktown ! kde ! org
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http://bugs.kde.org/show_bug.cgi?id=88467      
           Summary: Slow switching between folders under Solaris with NIS
           Product: kmail
           Version: 1.5.1
          Platform: unspecified
        OS/Version: Solaris
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kmail-devel kde org
        ReportedBy: jeremy.rand alcatel com


Version:           1.5.1 (using KDE 3.1.1)
Compiler:          gcc version 3.2.3
OS:                SunOS (sun4u) release 5.8

I am using KDE and kmail on Solaris 8.  In our environment, we manage our users with \
NIS.  I have found for as long as I have been using KDE/kmail (since about KDE 1.5) \
that performance was slow when switching between local folders of emails.  The \
contents of those folders didn't seem to influence how long the switch time was.  For \
example, switching to a folder of 10 or 1000 messages was irrelevant.  Switch times \
of 10-15 seconds were common.

I did an investigation and found that kmail was blocked in initgroups() for most of \
the time during the switch.  In fact, switching folders seemed to result in three \
calls to initgroups() and each can take a couple of seconds.

I found this reference online:

http://mail.cc.umanitoba.ca/source/

Apparently the initgroups() implementation on Solaris doesn't perform well when using \
NIS.  An implementation which is faster is available from this page which can be used \
with LD_PRELOAD.  Sure enough, that fixed the problem and I can now switch between \
folders quickly by preloading this alternate implementation of initgroups().

It would be ideal if Sun fixed their implementation but I have some doubts that this \
will happen.  Failing that, could kmail be changed to call this alternate \
implementation of initgroups() when it is built for Solaris so the LD_PRELOAD hack \
can be removed?  The usability of kmail has increased substantially for me and I \
wonder how many others may be dealing with slow performance but not know how to fix \
it. _______________________________________________
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