[Using Sakai] Sakai Slow Down

[Mustansar Mehmood]

I am not so sure but looking at your JAVA_OPTS  

-Xms2500m -Xmx2500m

seems like you are not using your RAM completely assuming you have 32G 
of it.
 
here is a little reference
http://www.mail-archive.com/java-linux@java.blackdown.org/msg13984.html
Let us know how it goes.
--mustansar
 
Barb Kerns wrote:
> We have two SUN T5220s. One runs the Apache front-end and the MySQL
> database, each in a seperate zone. The other physical system runs Tomcat in
> a zone.
> The two servers are identical hardware:
> * Sun Fire T5220 servers
> * 1.2 GHz, 8 core 
> * 32 Gb memory 
> * Two 146 Gb disk drives (mirrored), plus disk space on the SAN
>
> On the production Sakai Tomcat server JAVA_OPTS are set to:
> JAVA_OPTS="-server -XX:+UseParallelGC -Xms2500m -Xmx2500m -XX:NewSize=512m
> -XX:MaxNewSize=512m -XX:PermSize=512m -XX:MaxPermSize=512m
> -Djava.awt.headless=true -Dsakai.demo=false"
>
> A quick look at top while the slowdown happens doesn't seem to indicate the
> problem is a hardware bottleneck.
>
> (Would one of you grant a favor and pass this on to the Production and
> Sakai-dev lists? I have registered to both the production and sakai-dev
> lists, but am still being denied the permissions to post to those lists.)
>
> Barb 
>
>
> On 9/10/09 12:43 PM, "Stephen Marquard" <stephen.marquard at uct.ac.za> wrote:
>
>   
>> Hi Barb
>>
>> It's a bit hard to say without more details. Some generic suggestions are:
>>
>> - Give the app servers more memory
>> - Add more app servers
>> - Upgrade to the latest release and/or maintenance branch (2.5.4, 2.6.0, 2-5-x
>> or 2-6-x).
>>
>> You could also look at the PROD category in JIRA to see production
>> configurations from other sites of similar scale.
>>
>> I'd suggest you post some more detailed info (e.g. about your app servers and
>> database and any information you have about where the bottlenecks are) to the
>> production or sakai-dev lists, which are better places to get feedback than
>> sakai-user.
>>
>> Regards
>> Stephen 
>>  
>>     
>>>>> Barb Kerns <brk at bumail.bradley.edu> 9/10/2009 7:35 PM >>>
>>>>>           
>> We are in the midst of moving from Blackboard to Sakai and have had high
>> adoption this Fall by faculty.  However, this week Sakai web services
>> stopped twice and at other times is slow to load pages.  We are self hosted
>> Sakai 2.5.0 on two Sun servers and have about 650 course sites, 1000
>> simultaneous sessions through most of the day/evening and about 1 million
>> hits per day.  Where should we start in improving speed/performance?
>> We would appreciate any guidance.
>>
>> Barb Kerns
>> Bradley University
>> Peoria, IL USA
>> (309) 677-2332
>>
>>
>>     
>
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>   


-- 
Mustansar Mehmood
Educational System Developer

Infromation Technology  
6100 Main St MS 119
Houston Texas 77005

Phone:(713)348-2523
Fax  :(713)348 6099 
email:mustansar at rice.edu


Tell me and I forget. Teach me and I remember. Involve me and I learn.
                                    -- Benjamin Franklin

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