CAS memory issues

Wed Sep 3 16:20:03 EDT 2008

Scott, out of curiousity, what version of tomcat and java are you running?
We're gone with the settings that Renato posted (Xms 512 Xmx 1600) and we're
still hitting swap after about 10 hours of use (which isn't necessarily a bad
thing, just worried) and we still require a tomcat restart every morning.

We're only running tomcat/apache on the server, nothing else. Tomcat 5.5.20 and
Java 1.6.0_03.

Yale CAS mailing list <cas at tp.its.yale.edu> on September-03-08 at 1:13 PM -0400
wrote:
>We have 50K users and we have similar JAVA_OPTS.  I don't know how many
>tickets  we issue a day but I have some 120K+ authentications per day (which
>woculd mean that more tickets are generated).
>
>Anything else live in that JVM?  Any special customizations?
>-Scott
>
>On 9/3/08, Renato Giron <[ mailto:renato.giron at yahoo.com
>]renato.giron at yahoo.conm> wrote:
>
>
>
>
>All our distance learning students authenticate through CAS into their
>blackboadrd account. We also have several casified applications. It may just
>bea too much load. Performance is great though.
>
>I noticed the documentation for JDBCTicketRegistry and BerkleyDB is empty. I
>wonuld really like to play with these alternatives to ticket registry.
>
>
>--- On Wed, 9/3/08, Scott Battaglia <[ mailto:scott.battaglia at gmail.com
>]scott.Wbattaglia at gmail.com> wrote:
>
>From: Scott Battaglia <[ mailto:scott.battaglia at gmail.com
>]scott.battaglia at gmai l.com>
>Subject: Re: CAS memory issues
>To: [ mailto:renato.giron at yahoo.com ]renato.giron at yahoo.com, "Yale CAS mailing
>Tlist" <[ mailto:cas at tp.its.yale.edu ]cas at tp.its.yale.edu>
>Date: Wednesday, September 3, 2008, 10:05 AM
>
>
>We maintain a list of documentation here:
>[ http://www.ja-sig.org/wiki/display/CASUM/Home
>]http://www.ja-sig.org/wiki/dissplay/CASUM/Home
>
>You'll find the different ticket stores there.  But again, it would seem weird
>Ythat you're having memory issues, as the same mechanism has been used for
>yearts (though your usage pattern could be significantly different I guess).
>
>-Scott
>
>On 9/2/08, Renato Giron <[ mailto:renato.giron at yahoo.com
>]renato.giron at yahoo.conm> wrote:
>
>
>Thank you Scott,
>
>I will try to get the memory dump on the production server (since I don't
>thinkl it will be worth  doing it on test.)
>
>In the mean time, Is there a documentation that I can read for setting up DB
>ti cket store?
>
>Thanks for your time and support.
>
>
>
>--- On Tue, 9/2/08, Scott Battaglia <[ mailto:scott.battaglia at gmail.com
>]scott.Tbattaglia at gmail.com> wrote:
>
>From: Scott Battaglia <[ mailto:scott.battaglia at gmail.com
>]scott.battaglia at gmai l.com>
>Subject: Re: CAS memory issues
>To: [ mailto:renato.giron at yahoo.com ]renato.giron at yahoo.com, "Yale CAS mailing
>Tlist" <[ mailto:cas at tp.its.yale.edu ]cas at tp.its.yale.edu>
>Date: Tuesday, September 2, 2008, 5:15 PM
>
>
>We've been using CAS in production since 2005 with the same in-memory ticket
>st'ore (and most likely less allocated memory and haven't experienced that
>probrlem).  If you can, use a tool to get a memory dump and see what objects
>aroe being held on to.
>
>Also if you wrote any custom code make sure its not holding on to anything
>acci dentally.
>
>-Scott
>
>On 9/2/08, Renato Giron <[ mailto:renato.giron at yahoo.com
>]renato.giron at yahoo.conm> wrote:
>
>
>Hello friends,
>
>I posted this message several months ago. I still have the same memory issue
>evpen after upgrading to [ http://3.2.1. ]3.2.1. Can some one point me to the
>rvight direction for utilizing a database for tickets registry storage?
>
>Thanks in advance.
>
>"My CAS 3.1 application does not free up memory considerably during garbage 
>collection. The amount of memory that is freed up decreases on each garbage
>collection until there is no more memory available and the application crashes.
>I looked at the CAS logs and it seems to be clearing expired tickets every
>threoe 
>hours.
>
>I am using the WAR file that comes with the distribution with no changes
>(excepst
>for UI) My application is used by approximately 30K users and it seems to be
>handling the load with no problems.
>
>I am new to CAS so I would like to hear some advice from the experts. Is this a
>CAS design issue? Is there a way to optimize tickets registry? Can tickets be
>registered on database engines (like MySQL)?
>
>This is my current configuration: 
>
>-Windows 2003 [ http://osdir.com/ml/java.jasig.cas.user/2007-10/msg00007.html#
>-]Server
>-Tomcat 5.5 JRE 1.6
>-CAS 3.1
>-Xms512m
>-Xmx1600m"
>
>
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>
>-- 
>-Scott Battaglia
>PGP Public Key Id: 0x383733AA
>LinkedIn: [ http://www.linkedin.com/in/scottbattaglia
>]http://www.linkedin.com/nin/scottbattaglia 
>
>
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>-- 
>-Scott Battaglia
>PGP Public Key Id: 0x383733AA
>LinkedIn: [ http://www.linkedin.com/in/scottbattaglia
>]http://www.linkedin.com/nin/scottbattaglia 
>
>
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>
>-- 
>-Scott Battaglia
>PGP Public Key Id: 0x383733AA
>LinkedIn: [ http://www.linkedin.com/in/scottbattaglia
>]http://www.linkedin.com/nin/scottbattaglia_______________________________________________
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