Improve Portal performance with BI-Java by adding additional server node.
Hi SAP Expert
I wonder anyone might have attempted this before,
In an environment with BI-Java and Portal Java stack installed on the same server, is it possible to improve the system performance by adding additional portal server node? or is there any improvement seen by adding the extra server node?
I am after suggestion and experience on how the portal performance can be improve, with consideration of BI-Java sharing Portal resources.
Any comment will be most appreciated.
Hi Jim,
We've this configuration at our site, Portal and BI running together (not federated). Recommendations would be to:
1. Set a sensibly large max heap size on each server node of Portal (at least 2GB if not larger) and implement several nodes at least. For example we have 4 x physical nodes, each running 3 server nodes of 2GB max heap size apiece so a total of 12 nodes.
2. Implement the BI Safety Belt for large results sets (1127156)
3. Implement the latest JVM / JDK you can on your environment. We found much improved performance after implementing JDK SR10 with the J9/2.3 options enabled e.g., -Xjvm:j9vm23
-Xsoftrefthreshold0
4. Patch your BI components on the Portal (BIBASES, BIWEBAPP etc) to the latest available patch level for your Portal SP level
5. Make sure all your RFC connections are load balanced to the backend and tuned for the kind of load you expect on your reports, and the BI is sized appropriately in terms of app servers and dialog work processes, RFC-enabled login groups in SMLG etc.
6. Consult notes 1048691 (especially useful, opions &PROFILING=X&TRACE=X added to reports for example for performance tracing), 937697, 1021921, 948158 for information about problem analysis for this scenario
7. Implement SAP Web Dispatcher for Portal to reduce load on static mime files
8. Tune the Portal application. There's plenty information on SDN related to Portal performance tuning.
I hope this helps!
Cheers,
Marc
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There is of course another difference between your test cases then just the database. There is also the driver. And I suspect that in at least the case with the jtds driver it is helping you along where you are doing something silly and the Oracle driver is not.
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while (lNextBottom <= lNextCeiling) {
con = getConnection();
innerSelStmt = con.prepareStatement("SELECT Hictgid, Hictgname FROM HIERARCHYCATEGORY WHERE HICTGID = ?");
innerSelStmt.setLong(1, lNextBottom);
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con.close();
lNextBottom++;
}There at least four things that are wrong with above.
1) Why are you preparing the statement INSIDE the loop. Let us for a moment say that the loop will spin 100 times. That means that you are preparing the same statement 100 times. This is bad. It is also very relevant because for example the Jtds driver is going to be caching the prepared statements you make so that actually while you try and prepare it 100 times it only actually does it once... but in Oracle I don't know what it is doing for sure but if it is preparing on each pass well than that bit of it is going take 100 times longer then it should.
2) You are opening and closing the connection on each pass through the loop... also a terrible idea. You need to fix this first so that you can repeatedly use the same prepared statement.
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Okay so for starters your loop should look a lot more like this...
code]
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innerSelStmt = con.prepareStatement("SELECT Hictgid, Hictgname FROM HIERARCHYCATEGORY WHERE HICTGID = ?");
while (lNextBottom <= lNextCeiling) {
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>
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