OBIEE Performance Tuning Part 2

For the second part of my OBIEE Tuning guide we will look at the instanceconfig.xml and changes that can be made here. As stated in my previous post I dont believe in cache when performance tuning as it can lead to false results, in that respect make sure cache is turned off in OBIEE Enterprise Manager, the below settings can be set by editing the instanceconfig.xml file.

<Table>
 <MaxCells – 200000>
 <MaxVisibleColumns - 1000>
 <MaxVisiblePages – 1000>
 <MaxVisibleRows – 100000>
 <MaxVisibleSections – 1000>
 <Table>
 <DefaultRowsDisplayed – 25>
 <DefaultRowsDisplayedInDownload – 2500>

<Pivot>
 <MaxCells – 200000>
 <MaxVisibleColumns - 1000>
 <MaxVisiblePages – 1000>
 <MaxVisibleRows – 100000>
 <MaxVisibleSections – 1000>
 <Pivot>
 <DefaultRowsDisplayed – 25>
 <DefaultRowsDisplayedInDownload – 2500>

<ThreadPoolDefaults>
 <ChartThreadPool>
 <MaxQueue>2048</MaxQueue>
 <MaxThreads>**</MaxThreads> (Max Threads no. cores x 8)
 </ChartThreadPool>
 </ThreadPoolDefaults>

<Cursors>
 <NewCursorWaitSeconds>10</NewCursorWaitSeconds>
 </Cursors>

<Catalog>
 <LockStaleSecsSoft>14400</LockStaleSecsSoft>
 <LockStaleSecsHard>14400</LockStaleSecsHard>
 <HashUserHomeDirectories>3</HashUserHomeDirectories>
 <UpgradeAndExit>false</UpgradeAndExit>
 </Catalog>

<BIEEHomeLists>
 <Enabled>false</Enabled>

With the above changed made I restarted all services including the database to ensure an accurate report running time was recorded.

Results:
Time after changing NQServer.ini Time with instanceconfig.xml changes
1. 1m54s 1m44s
2. 2m46s 2m56s
3. 5m13s 5m15s
4. 2m34s 2m42s

Looks like the reports performed slightly worse than before. Even with reports running worse I left the settings in as with my original post only a 10s or more differnece either way will count as an improvment.

Until next time I will show the changed made to the Data Warehouse itself.