OBIEE 10g: Presentation Cache in Second Instance of Presentation Server

Hi everyone,
I've been having an issue with my presentation cache disappearing every couple of minutes.
I'm working with OBIEE 10.1.3.4, on Oracle Application Server on a Linux RHEL 5.4 32bit. I've spun up a second instance of the presentation service using the commands from RNM1978's blog here (http://rnm1978.wordpress.com/2009/08/25/multiple-rpds-on-one-server-part-2-presentation-services/). The reason why I have a second instance of the presentation service is for mobile reporting purposes. We have lots of executives using iPhones and the Oracle Business Intelligence Indicators application. The second instance defaults all charts to be PNGs, it also uses a separate, clean catalog, so that the executives don't get lost in all of the out of the box BI Applications content that is in our main catalog.
Everything is setup and working properly, both presentation services are accessible and use the same RPD but different catalogs. The only thing that isn't working is the presentation service cache. A lot of these reports are QTD or YTD so it takes a few minutes to run some. We were hoping to use iBots to create BI Server cache at the beginning of the day. That seemed to help a bit but it seems to clear after a few minutes.
Additionally, before we went to do demos to end users, we would run all the reports from a demo iPhone. Go to do the demo and within five minutes, the presentation cache would have already cleared. I confirmed the same by looking in the Session Manager of the second presentation service.
Does anyone know why this would be happening? I have cache turned on in the bi server and I also have the following settings in my instanceconfigMobile.XML:
<Cache>
<Query>
<CacheMaxEntries>1000</CacheMaxEntries>
<CacheMaxExpireMinutes>720</CacheMaxExpireMinutes>
<CacheMinExpireMinutes>720</CacheMinExpireMinutes>
<CacheMinUserExpireMinutes>720</CacheMinUserExpireMinutes>
</Query>
</Cache>
Are there other settings I need to investigate?
Is this just additional commands I need to run when launching the additional presentation service? Here's the command I'm using:
. ./common.sh
. ./sa-init.sh
sawserver -c /home/oracle/OracleBIData/web/config/instanceconfigMobile.xml >> /home/oracle/OracleBIData/web/log/sawserverMobile.out.log 2>&1 &
Thanks!
-=Joe

Hi Joe
I can't say I've tried Robin's technique to run two presentation servers but from my basic understanding of it, both versions will share the same cache as defined in a single nqsconfig.ini file. Maybe these 2 are conflicting somehow?
I see that a separate instanceconfig.xml is used for each presentation server. I know there are a bunch of advanced, largely undocumented, cache properties you can set in there. I can send you a document listing the various properties if you want to play with it - contact me via my website.
Paul
http://total-bi.com

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