Virtual Memory Consumption of Cyrus IMAPd

[Lenny]

Very useful information. Thank you, Igor.

Lenny
--

"Wisdom is to a man an infinite Treasure" - Anonymous"


Quoting Igor Brezac <igor at ipass.net>:

> On Mon, 19 Jul 2004, Lenny wrote:
>
>> Ya, I could do that. Would there be a gain for me to compile the latest from
>> source and using the ldap mech as opposed to the "-n0" flag suggestion
>> that was
>> made?
>
> -n0 is very taxing on the OS specially if you have a lot of users.
> saslauthd/ldap does not leak (so you do not have restart saslauthd
> every so often) and it is much faster than pam/ldap.
>
> --
> Igor
>
>>
>> Lenny
>> --
>>
>> "Wisdom is to a man an infinite Treasure" - Anonymous"
>>
>>
>> Quoting Igor Brezac <igor at ipass.net>:
>>
>> > On Mon, 19 Jul 2004, Lenny wrote:
>> >
>> >> Fedora Core 1's saslauthd doesn't seem to like me setting the mech to
>> >> ldap. This
>> >> works great on Core 2, but I'm not in a postition to migrate all 
>> the cyrus
>> >> servers to Fedora Core 2 as of yet. So this is a temporary 
>> problem for me :)
>> >
>> > Can you build saslauthd from the source...
>> >
>> > -Igor
>> >
>> >>
>> >> Lenny
>> >> --
>> >>
>> >> "Wisdom is to a man an infinite Treasure" - Anonymous"
>> >>
>> >>
>> >> Quoting Igor Brezac <igor at ipass.net>:
>> >>
>> >> > pam is known to leak memory on some OSs.  This is really not saslauthd
>> >> > problem.  Have you tried to use saslauthd built-in ldap mech?
>> >> >
>> >> > -Igor
>> >> >
>> >> > On Mon, 19 Jul 2004, Lenny wrote:
>> >> >
>> >> >> Using the pam mech which in turn is authing against an 
>> openldap server.
>> >> >>
>> >> >> I've tried the -n0 flag that was just mentioned in hopes this solves
>> >> >> the problem
>> >> >> :)
>> >> >>
>> >> >> Lenny
>> >> >> --
>> >> >>
>> >> >> "Wisdom is to a man an infinite Treasure" - Anonymous"
>> >> >>
>> >> >>
>> >> >> Quoting Igor Brezac <igor at ipass.net>:
>> >> >>
>> >> >> > What saslauthd authentication mechanism are you using?
>> >> >> >
>> >> >> > -Igor
>> >> >> >
>> >> >> > On Mon, 19 Jul 2004, Lenny wrote:
>> >> >> >
>> >> >> >> Not sure about RHEL, but on Fedora Core 1 the saslauthd process
>> >> >> eats tons of
>> >> >> >> swap until eventually there's no memory left. Great fun! This of
>> >> >> >> course stops
>> >> >> >> cyrus from being able to process imap and pop logins (if 
>> you're using
>> >> >> >> saslauthd
>> >> >> >> for authentication). A simple restart usually fixes this
>> >> >> particular problem.
>> >> >> >>
>> >> >> >> This may or may not be related to what you're seeing, but I figured
>> >> >> >> I'd throw
>> >> >> >> this out there.
>> >> >> >>
>> >> >> >> Lenny
>> >> >> >> --
>> >> >> >>
>> >> >> >> "Wisdom is to a man an infinite Treasure" - Anonymous"
>> >> >> >>
>> >> >> >>
>> >> >> >> Quoting Mohamed Magdi Abbas <abbasmm at longwood.edu>:
>> >> >> >>
>> >> >> >> > I'm running cyrus impad(v 2.2.6), used to run 2.1.16, on
>> >> RHEL 3.0 and
>> >> >> >> > noticed that the amount of swap space free is decreasing. 
>> When I was
>> >> >> >> > running v2.1.16, the swap free would decrease until the
>> >> kernel oom(out
>> >> >> >> > of memory) killer would activate and start killing 
>> processes which
>> >> >> >> > essentially grinds the system to a halt. I doubt that this
>> >> is normal.
>> >> >> >> > Could this point to a memory leak in cyrus. Just for note, I
>> >> have not
>> >> >> >> > yet experienced this with the latest version, but the 
>> swap free is
>> >> >> >> > decreasing.
>> >> >> >> >
>> >> >> >> > By the way I'm using simons RPMS from invoca.ch. Could someone
>> >> >> shed some
>> >> >> >> > light on this. Anything will help...
>> >> >> >> >
>> >> >> >> > Mohamed Magdi Abbas
>> >> >> >> > Systems Engineer
>> >> >> >> > Longwood University
>> >> >> >> > abbasmm at longwood.edu
>> >> >> >> >
>> >> >> >> > ---
>> >> >> >> > Cyrus Home Page: http://asg.web.cmu.edu/cyrus
>> >> >> >> > Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
>> >> >> >> > List Archives/Info: 
>> http://asg.web.cmu.edu/cyrus/mailing-list.html
>> >> >> >>
>> >> >> >>
>> >> >> >> ---
>> >> >> >> Cyrus Home Page: http://asg.web.cmu.edu/cyrus
>> >> >> >> Cyrus Wiki/FAQ: http://cyruswiki.andrew.cmu.edu
>> >> >> >> List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
>> >> >> >>
>> >> >> >
>> >> >> > --
>> >> >> > Igor
>> >> >>
>> >> >>
>> >> >>
>> >> >
>> >> > --
>> >> > Igor
>> >>
>> >>
>> >>
>> >
>> > --
>> > Igor
>>
>>
>>
>
> --
> Igor


---
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