[Building Sakai] 2.9.1 Performance Issues

Wed Jul 24 09:01:30 PDT 2013

The cache you are mentioning would be hard to take up that much memory,
especially with the default settings of 10k items.  For example,
restrictedAuthToolsCache is a map of userId->siteId->restrictedTools for
only delegated access admin users.  99% of the time, the list of restricted
tools will be an empty list unless you have manually went into the user's
permissions and checked off a list of tools that are restricted, then its
just that list.  Also, this list is only populated whenever a user tries to
access the site, otherwise, it isn't in the cache.

Are you doing something special with Delegated Access?  Also, could you
send the dump of your Administration Workspace->Memory information?  Maybe
there's something in there that can help.

-Bryan

On Wed, Jul 24, 2013 at 11:25 AM, Curtis Van-Osch <curtis.van-osch at hec.ca>wrote:

>  Thanks Sam and David,
> I've integrated those patches, but upon inspecting a heap dump in Eclipse
> MAT, it looks like our Delegated Access cache is filling the memory!
>
> I've opened an issue in jira here:
> https://jira.sakaiproject.org/browse/DAC-56
>
> I'm hoping it's just a question of setting better ehcache settings...
>
> Curtis
>
> -------- Message original --------
> Sujet: Re: [Building Sakai] 2.9.1 Performance Issues
> De : David Horwitz <david.horwitz at uct.ac.za> <david.horwitz at uct.ac.za>
> Pour : Sam Ottenhoff <ottenhoff at longsight.com> <ottenhoff at longsight.com>
> Copie à : Curtis Van-Osch <curtis.van-osch at hec.ca><curtis.van-osch at hec.ca>,
> sakai-dev Developers <sakai-dev at collab.sakaiproject.org><sakai-dev at collab.sakaiproject.org>
> Date : 2013-07-24 04:54
>
> You might want to look at this fix too:
>
> https://jira.sakaiproject.org/browse/SAK-23524 (Roster)
>
> its a similar pattern to the GB one bellow and caused us some pain.
>
> D
>
> On Tue, 2013-07-23 at 16:56 -0400, Sam Ottenhoff wrote:
>
> I haven't observed any issues that would explain gigantic memory usage CPU
> spiked at 100%.  I would try to get a heap dump into Eclipse MAT as soon as
> possible.
>
>
>
>  --Sam
>
>
>
>  On Tue, Jul 23, 2013 at 4:53 PM, Curtis Van-Osch <curtis.van-osch at hec.ca>
> wrote:
>
>  Hello,
> We at HEC Montréal recently upgraded to Sakai 2.9.1 (last monday).
> Everything went well, but we have been experiencing performance issues ever
> since.  Memory usage hovers between 6.5 and 8 gigabytes, and CPU usage
> often spikes to 100%
>
> our JAVA_OPTS="-d64 -server -Xmx10g -Djava.awt.headless=true -Xms512m
> -XX:MaxPermSize=768m -XX:PermSize=256m -Duser.language=fr -Duser.region=CA"
>
> We're planning on inspecting a heap dump tomorrow morning, and we're
> looking at applying this Gradebook patch<https://jira.sakaiproject.org/browse/SAK-23385>(SAK-23385).
>
> Does anyone have any other ideas for diagnosing performance issues?
>
>  --
>   <http://www.hec.ca>
>
>  Curtis Van Osch Analyste-Programmeur Direction des technologies de
> l'information  [image: hec.ca] <http://www.hec.ca>  [image: Agréments] 3000, chemin de la Côte-Sainte-Catherine,
> Montréal (Québec) H3T 2A7 Téléphone : 514 340-6000, poste 2029
>
>    [image: recyclez]   Pensons à l'environnement avant d'imprimer
>
>
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> --
>    <http://www.hec.ca>
>  Curtis Van Osch
> Analyste-Programmeur
> Direction des technologies de l'information
>   [image: hec.ca] <http://www.hec.ca>   [image: Agréments]
> 3000, chemin de la Côte-Sainte-Catherine, Montréal (Québec) H3T 2A7
> Téléphone : 514 340-6000, poste 2029
>
>    [image: recyclez]
> Pensons à l'environnement
> avant d'imprimer
>
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