Difference between Presentation Server Cache and BI Server Cache

Hello Experts,
What is the Diff b/w Presentation Server Cache and BI Server Cache
Thanks,
S Gouda

Hello,
Okay, what do you want to do about caching at BI server and Presentation server.
A nQSXXXX.tmp is a temporary cache file which maintained by the BI Server for an analysis request by a user and is kind of shared data between the OBI Server and the OBI Presentation server. This is refereed as the 'Cursor Cache' which could be managed by going thru Administration> Manage Sessions > Clear Cursor Cache.These .tmp files are it is not related to BI Server cache.
By Default, the BI Server Cache is stored in the and stored as NQSxxxxx.tbl files. [middlware_home]/instances/instance1/bifoundation/OracleBIServerComponent/coreapplication_obis1/cache]
Caching occurs by default at the subrequest level, which results in multiple cache entries for some SQL statements. Caching subrequests improves performance and the cache hit ratio, especially for queries that combine real-time and historical data.
Below are some useful links for cache management in OBIEE 11g.
http://oraclebisolutions.blogspot.com/2013/02/obiee-11g-obi-server-and-presentation.html
http://drazda.blogspot.com/2012/10/obiee-11g-cache-management.html
http://allaboutobiee.blogspot.in/2012/03/cache-management-purging-cache.html
Pls mark itf this helps. Else post the exact questions you have about this post.
Thanks,
SVS

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