[Building Sakai] Unisa problems

[John Bush]

There's not a lot of info to go on here.  What are you doing to do get to
the root cause?  Thread dump, heap dumps, root cause tools, etc.  What have
they shown you?  What makes you think you have connection pooling issues?
 Are you having CPU issues or memory issues or both ?


On Mon, Feb 3, 2014 at 11:18 AM, Arlow, Magdaleen <Arlowm at unisa.ac.za>wrote:

>  This message (and attachments) is subject to restrictions and a
> disclaimer. Please refer to http://www.unisa.ac.za/disclaimer for full
> details.
>  ------------------------------
>
>  We are having serious problems with our Sakai configuration and database
> connections. We suspect it is the connection pooling, but we are not even
> sure. We are running Sakai 2.9.1 running 9 nodes with an Oracle database.
>  Each node pair is running on an Apache HTTP server with 16GB memory linked
> to a tomcat server with 24GB memory (20GB heap). The split to put apache
> and tomcat on two different servers were done recently in an attempt to
> improve throughput.
>
>
>
> We upgraded to Sakai 2.9.1 in October 2013. We did not experience problems
> with the release right away, but it is now a new academic period with a
> wider range of learning activities.
>
>
>
> We have an Oracle 11G database on IBM AIX, planning to move to an Exadata
> server as soon as possible. We run commons-dbcp 1.2.2 database pooling. We
> are also considering upgrading to version 1.4 as suggested on the web, but
> this is not the Sakai kernel setup.
>
>
>
> Since middle December we started having problems where the technical team
> has to restart nodes very often. We thought that an upgrade to better
> infrastructure would solve the problem. We have upgraded to better servers,
> but at the moment many users do not even get the landing page of myUnisa.
>
>
>
> We see the JIRAS KNL-600 and KNL-1011 as related to our problems. We'll
> welcome any advice or suggestions. Please let us know if you need more info
> to give input.
>
>
>
> Kind regards
>
> *Magdaleen Arlow on behalf of the Unisa team*
>
> *ICT Department*
>
>
>
> *'* +27 (0) 12 429 3102
>
> Cell + 27 (0) 82 783 9163
>
> Email : arlowm at unisa.ac.za
>
>
>
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>
>
>
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-- 
John Bush
602-490-0470

** This message is neither private nor confidential in fact the US
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