HST60: Huge Performance Problem with VAPI Views

We are using a VAPI view (with instead-of-triggers) for a table with +/- 60 columns.
In this instead-of-trigger we call some functions to return constants and variables.
Using DML (for example a Update) on this view takes the Server 80 sec. CPU time.
Direct update on the table takes 0.2 secs. CPU time.
Assistance please cause we are planning to use VAPI views to populate a new database model with old Forms.
As I know in Oracle 7 there was a problem with code in triggers. I believe they were compiled each time they were called. And package onces !! MAybe has this something to do with it.
Thanks in advise,
M. Overdijk
null

Marc,
Thanks for the reply....
We are using 8.1.6 currently.
This is a problem of one my fellow developers. The problem is the update using the rowid. Headstart has a booster to customize a Designer module to not use this rowid.
Problem we have is we have a old Forms 4.5 application. We made a new server model along with cdm ruleframe. The old tables are dropped and the old forms now work with VAPI views......redericting the data the new tables.
Now we have (we think) the same problem wherefor Headstart has this above called booster.
Any solutions for us ??? Cause we don't want to change the old application forms (there are to much !!)
Our solution is to drop the instead of triggers and use some cev business rule to redirect the data...
Disadvantages:
1. some work to do
2. whern the old application is dropped we have to remove the cev rules.
Any other solutions

Similar Messages

Performance problem with WPF Viewer CRVS2010

Hi,
We are using Crystal Reports 2010 and the new WPF Viewer. Last week when we set up a test machine to run our integration tests (several hundred) all report tests failed (about 30 tests) with a timeout exception.
The testmachine setup:
HP DL 580 G5
WMWare ESXi 4.0
Guest OS: Windows 7 Enterprise 64-bit
Memory (guest OS): 3GB
CPU: 1
Visual Studio 2010
Crystal Reports for Visual Studio 2010 with 64 bit runtime installed
Visual Studio 2008 installed
Microsoft Office 2010 installed
Macafee antivirus
There are about 10 other virtual machines on the same HW.
I think the performance problem is related to text obejcts on a report document viewed in a WPF Viewer. I made a simple WPF GUI with 2 buttons and the first button executes a very simple report that only has a text object with a few words in it and the other button is also a simple report with only 1 text object with approx. 100 words (about 800 charchters).
The first report executes and displays almost instantly and the second report executes instantantly but displays after approx. 1 min 30 sec.
And execute in this context means that all VB.Net code runs in the compiler without any exception or performance problem. The performance problem seems to come after viewer.Show() (in the code below) has executed.
I did another test on the second report and replaced the text obejct with a formula field with the same text as the text object and this test executed and displayed the report instantly.
So the performance problem seems to have something to do with rendering of textobjects in the WPF Viewer on a virtual machine with the above setup.
I've made several tests on local machines with Windows XP (32 bit) or Winows 7 (64 bit) installed and none of them have this performance problem. Its not a critical issue for us because our users will run this application on their local PCs with Windows 7 64-bit but its a bit problematic for our project not being able to run all of our integration tests but I will probably solve this by using a local PC instead.
Here is the VB.Net code Im using to View the reports:
Private Sub LightWeight_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        Dim lightWeightReport As New CrystalDecisions.CrystalReports.Engine.ReportDocument
        lightWeightReport.Load(Environment.CurrentDirectory & "\LightWeight.rpt")
        ' Initialize Viewer
        Dim viewer As LF.LIV.PEAAT.Crystal.Views.ReportViewer = New LF.LIV.PEAAT.Crystal.Views.ReportViewer()
        viewer.Owner = Me
        viewer.reportViewer.ViewerCore.ReportSource = lightWeightReport
        viewer.Show()
    End Sub
    Private Sub LightWeightSlow_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs)
        Dim lightWeightReport As New CrystalDecisions.CrystalReports.Engine.ReportDocument
        lightWeightReport.Load(Environment.CurrentDirectory & "\LightWeightSlow.rpt")
        ' Initialize Viewer
        Dim viewer As LF.LIV.PEAAT.Crystal.Views.ReportViewer = New LF.LIV.PEAAT.Crystal.Views.ReportViewer()
        viewer.Owner = Me
        viewer.reportViewer.ViewerCore.ReportSource = lightWeightReport
        viewer.Show()
    End Sub
The reports are 2 empty default reports with only 1 textobject on the details section.
// Thomas

See if the KB [
[1448013 - Connecting to Oracle database. Error; Failed to load database information|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333433343338333033313333%7D.do] helps.
Also the following may not hurt to have a look at (if only for ideas):
[1217021 - Err Msg: "Unable to connect invalid log on parameters" using Oracle in VS .NET|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333233313337333033323331%7D.do]
[1471508 - Logon error when connecting to Oracle database in a VS .NET application|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333433373331333533303338%7D.do]
[1196712 - Error: "Failed to load the oci.dll" in ASP.NET application against an Oracle database|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333133393336333733313332%7D.do]
Ludek
Follow us on Twitter http://twitter.com/SAPCRNetSup

Performance Problem with _DIFF - Views

Hi!
We have tables with several million rows under version - control. Before we merge the changes in the Child - Workspace (very few changes typically), we need to view the differences to our users.
So we tried:
exec dbms_wm.setdiffversions('LIVE', 'myworkspace');
and:
Select ID from XXX_Diff ('ID' being the primary - key column).
Unfortunately the select - statement takes a very long time:
call count cpu elapsed disk query current rows
Parse 1 16.68 16.66 0 12 0 0
Execute 1 0.01 0.01 0 0 0 0
Fetch 1 74.65 152.71 785781 816676 0 1
total 3 91.35 169.40 785781 816688 0 1
As i can see from the trace, the explain - plan is very bad, we get a table full access on the XXX_LT table.
Our statistics are up to date (dbms_stats.gather_schema_stats).
WM - Version: 10.1.0.5.1
DB - Version: 10.1.0.4.0
Any ideas?
cheers,
Nothi

Hi Nothi,
It is difficult to say without alot more information. The easiest way to fix performance issues is to file a TAR on the problem, so that all of the required information can be obtained for testing/analysis. A testcase might also be needed.
The only suggestion I have without this information would be when gathering statistics with dbms_stats to set the method_opt parameter to 'for all columns size x', where x is greater than the number of versions in the system. This can be obtained with the following:
SQL> select count(*) from all_version_hview ;
Also, be sure that the shared cursors get invalidated after gathering statistics. If this is not done, it will continue using the old plan. There is a no_invalidate parameter in gather_schema_stats/gather_table_stats used for this purpose.
Regards,
Ben

Performance problem with slow VIEW from JDBC (fast from SQL Developer)

Hi all,
I'm experiencing following problem and would like to know if someone else also hit this one before and has a suggestion how to solve it:
I have a pretty complicated SELECT statement that per definition returns only a few rows (~30). With no further optimization it takes ~20 seconds to return the full dataset in Oracle SQL Developer. If you add the */+ PUSH_PRED(name_of_some_inner_view) /* hint (hint is correct, stars got eaten by the OTN-forum syntax), the statement takes less than 0.5s to execute (still in SQL Developer). I saved the statement with the hint as VIEW. Selecting from the VIEW in SQL Developer is also fast.
Now if I call the statement from JDBC (Tomcat webapp), I can see from the server console that the statement is 1:1 100% the same as the one I execute in SQL Developer. Nevertheless it takes about 20 seconds to complete.
Here my details:
SELECT banner FROM v$version;
BANNER
Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production
PL/SQL Release 11.2.0.2.0 - Production
CORE     11.2.0.2.0     Production
TNS for 32-bit Windows: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - Production
JDBC Driver used: some old odbc14.jar as well as current odbc6.jar for 11.2.0.2.0 from http://www.oracle.com/technetwork/da...10-090769.html
SQL Developer: current version 3.2.20.09From my reading this could go wrong:
- JDBC doesn't know the VIEW's column data types and Oracle behaves mysterious because of this (=there must be more to the SELECT than just the string, some meta-information)
- For some reason the hint inside the VIEW is not used (unlikely)
I also tried a Table Function/Pipelined table and selected from it as a workaround, but the result is the same: Selecting from Function is fast from SQL Developer, but slow from JDBC. All other statements that come from JDBC are as fast as they should be. I really don't know what to think of this and where the error might be.
Is there some setting that tells Oracle not to use hints when called from JDBC?
Thank you & Best regards,
Blama

Hi Bawer,
that's what I'm thinking. Unfortunately I can't post it, as it is library code (not my lib). But in the debug-output I can see the SQL-String sent to the DB (which does include the hint).
But I find the 2nd option you mention more likely anyway: Even if I put the hint into a VIEW and select from the view, the time-difference is there (it's even there if I use Table Functions/Pipelined table and select from the function).
So I'd think it is more likely that something else is happening (e.g. Oracle is configured in a way that it does not use hints when called from JDBC or similar. Or the library sets some session options in order to prevent the usage of hints). But I don't know if there is even the possibility of doing so.
Does the Oracle JDBC driver have the option to set these options?
Does the Oracle DB have the option to set sth. like "ALTER SESSION SET dontUseHints = 'Y';"

Performance problem with ojdbc14.jar

Hi,
We are having performance problem with ojdbc14.jar in selecting and updating (batch updates) entries in a table. The queries are taking minutes to execute. The same java code works fine with classes12.zip ans queries taking sub seconds to execute.
We have Oracle 9.2.0.5 Database Server and I have downloaded the ojdbc14.jar from Oracle site for the same. Tried executing the java code from windows 2000, Sun Solaris and Opteron machines and having the same problem.
Does any one know a solution to this problem? I also tried ojdbc14.jar meant for Oracle 10g, that did not help.
Please help.
Thanks
Yuva

My code is doing some thing which might be working well with classes12.zip and which does not work well with ojdbc14.jar? Any general suggestions to make the code better, especially for batch updates.
But for selecting a row from the table, I am using index columns in the where cluase. In the code using PreparedStatement, setting all the reuired fields. Here is the code. We have a huge index with 14 fields!!. All the parameters are for where clause.
if(longCallPStmt == null) {
longCallPStmt = conn.prepareStatement(longCallQuery);
log(Level.FINE, "CdrAggLoader: Loading tcdragg entry for "
+GeneralUtility.formatDate(cdrAgg.time_hour, "MM/dd/yy HH"));
longCallPStmt.clearParameters();
longCallPStmt.setInt(1, cdrAgg.iintrunkgroupid);
longCallPStmt.setInt(2, cdrAgg.iouttrunkgroupid);
longCallPStmt.setInt(3, cdrAgg.iintrunkgroupnumber);
longCallPStmt.setInt(4, cdrAgg.iouttrunkgroupnumber);
longCallPStmt.setInt(5, cdrAgg.istateregionid);
longCallPStmt.setTimestamp(6, cdrAgg.time_hour);
longCallPStmt.setInt(7, cdrAgg.icalltreatmentcode);
longCallPStmt.setInt(8, cdrAgg.icompletioncode);
longCallPStmt.setInt(9, cdrAgg.bcallcompleted);
longCallPStmt.setInt(10, cdrAgg.itodid);
longCallPStmt.setInt(11, cdrAgg.iasktodid);
longCallPStmt.setInt(12, cdrAgg.ibidtodid);
longCallPStmt.setInt(13, cdrAgg.iaskzoneid);
longCallPStmt.setInt(14, cdrAgg.ibidzoneid);
rs = longCallPStmt.executeQuery();
if(rs.next()) {
cdr_agg = new CdrAgg(
rs.getInt(1),
rs.getInt(2),
rs.getInt(3),
rs.getInt(4),
rs.getInt(5),
rs.getTimestamp(6),
rs.getInt(7),
rs.getInt(8),
rs.getInt(9),
rs.getInt(10),
rs.getInt(11),
rs.getInt(12),
rs.getInt(13),
rs.getInt(14),
rs.getInt(15),
rs.getInt(16)
}//if
end_time = System.currentTimeMillis();
log(Level.INFO, "CdrAggLoader: Loaded "+((cdr_agg==null)?0:1) + " "
+ GeneralUtility.formatDate(cdrAgg.time_hour, "MM/dd/yy HH")
+" tcdragg entry in "+(end_time - start_time)+" msecs");
} finally {
GeneralUtility.closeResultSet(rs);
GeneralUtility.closeStatement(pstmt);
Why that code works well for classes12.zip (comes back in around 10 msec) and not for ojdbc14.jar (comes back in 6-7 minutes)?
Please advise.

Performance problem with Integration with COGNOS and Bex

Hi Gems
I have a performance problem with some of my queries when integrating with the COGNOS
My query is simple which gets the data for the date interval : "
From Date: 20070101
To date:20070829
When executing the query in the Bex it takes 2mins but when it is executed in the COGNOS it takes almost 10mins and above..
Any where can we debug the report how the data is sending to the cognos. Like debugging the OLEDB ..
and how to increase the performance.. of the query in the Cognos ..
Thanks in Advance
Regards
AK

Hi,
Please check the following CA Unicenter config files on the SunMC server:
- is the Event Adapter (ea-start) running ?, without these daemon no event forwarding is done the CA Unicenter nor discover from Ca unicenter is working.
How to debug:
- run ea-start in debug mode:
# /opt/SUNWsymon/SunMC-TNG/sbin/ea-start -d9
- check if the Event Adaptor is been setup,
# /var/opt/SUNWsymon/SunMC-TNG/cfg_sunmctotng
- check the CA log file
# /var/opt/SUNWsymon/SunMC-TNG/SunMCToTngAdaptorMain.log
After that is all fine check this side it explains how to discover an SunMC agent from CA Unicenter.
http://docs.sun.com/app/docs/doc/817-1101/6mgrtmkao?a=view#tngtrouble-6
Kind Regards

Performance problem with graphs on Tabs (LV7.1)

I have huge performance problems in a subsystem using tab controls with graphs on top. The whole thing worked nice, until I record a measurement (abou 10k of double as data displayed on the graph). The win task manager indicates above 50% on both CPUs, the app hangs (or lags), my queues generate timeout messages...
The graph is located in one of the pages of a tab control. As well are several clusters of config data for the measurement.
As I said, the problems started, when I put the data of that size on the graph indicator.
The clusters are some nested typ defs, but it worked with them before, no huge arrays involved. All are bundled in a huge cluster (less than 1 k if saved as xml).
So I wonder, if the clusters and/or the graphs are the problem PLUS is that problem resolved in current LV-Versions (hoping to get the faster car & and I love the current GUI with tabs)?
Sorry, can't post the code, but if none of you knows that kind of problems and I can't solve it on my on in an hour or so, I can make some imitation code.
Felix
www.aescusoft.de
My latest community nugget on producer/consumer design
My current blog: A journey through uml

How many graphs are you referring to?
Are they all on your User Interface and running in the UI thread?
You might want to try putting your graphs in their own threads i.e., called dynamically or otherwise in a structure that allows LabVIEW to put them in their own thread. I've gotten good performance out of a PXI-8106 controller by calling a graph template dynamically. That's four graphs showing at once, 12 plots per graph, 10000 XY value pairs per plot. Each graph was setup to get its data every 50-200ms.
How much data you can plot with decent performance also depends on the hardware you're using, i.e., CPU speed, RAM size, video capability, etc. It can also depend on how efficiently you've coded your application. Are you initializing your data arrays and using "Replace Subset" or are you using the less efficient "Build Array" for example?
Message Edited by Bill@NGC on 09-11-2007 09:31 PM
“A child of five could understand this. Send someone to fetch a child of five.”
― Groucho Marx

CONNECT BY, Performance problems with hierarchical SQL

Hello,
I have a performance problem with the following SQL:
table name: testtable
columns: colA, colB, colC, colD, colE, colF
Following hierarchical SQL:
SELECT colA||colB||colC AS A1, colD||colE||colF AS B1, colA, colB, colC, level
FROM testable
CONNECT BY PRIOR A1 = B1
START WITH A1 = 'aaa||bbbb||cccc'
With big tables the performance of this construct is very bad. I can't use functional based indexes to create an Index on "colA||colB||colC" and "colD||colE||colF"
Has anyone an idea how I can get a real better performance for this hierarchical construct, if I have to combine multiple colums? Or is there any better way (with an PL/SQL or view trigger) solve something like this ??
Thanks in advance for your investigation :)
Carmen

Why not
CONNECT BY PRIOR colA = colD
and PRIOR colB = colE
and ...
? It is not the same thing, but I suspect my version is correct:-)

Performance problems with jdk 1.5 on Linux plattform

Performance problems with jdk 1.5 on Linux plattform
(not tested on Windows, might be the same)
After refactoring using the new features from java 1.5 I lost
performance significantly:
public Vector<unit> units;
The new code:
for (unit u: units) u.accumulate();
runs more than 30% slower than the old code:
for (int i = 0; i < units.size(); i++) units.elementAt(i).accumulate();
I expected the opposite.
Is there any information available that helps?

Here's the complete benchmark code I used:package test;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Vector;
public class IterationPerformanceTest {
     private int m_size;
     public IterationPerformanceTest(int size) {
          m_size = size;
     public long getArrayForLoopDuration() {
          Integer[] testArray = new Integer[m_size];
          for (int item = 0; item < m_size; item++) {
               testArray[item] = new Integer(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (int index = 0; index < m_size; index++) {
               builder.append(testArray[index]);
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getArrayForEachDuration() {
          Integer[] testArray = new Integer[m_size];
          for (int item = 0; item < m_size; item++) {
               testArray[item] = new Integer(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (Integer item : testArray) {
               builder.append(item);
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getArrayListForLoopDuration() {
          ArrayList<Integer> testList = new ArrayList<Integer>();
          for (int item = 0; item < m_size; item++) {
               testList.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (int index = 0; index < m_size; index++) {
               builder.append(testList.get(index));
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getArrayListForEachDuration() {
          ArrayList<Integer> testList = new ArrayList<Integer>();
          for (int item = 0; item < m_size; item++) {
               testList.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (Integer item : testList) {
               builder.append(item);
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getArrayListIteratorDuration() {
          ArrayList<Integer> testList = new ArrayList<Integer>();
          for (int item = 0; item < m_size; item++) {
               testList.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          Iterator<Integer> iterator = testList.iterator();
          while(iterator.hasNext()) {
               builder.append(iterator.next());
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getLinkedListForLoopDuration() {
          LinkedList<Integer> testList = new LinkedList<Integer>();
          for (int item = 0; item < m_size; item++) {
               testList.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (int index = 0; index < m_size; index++) {
               builder.append(testList.get(index));
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getLinkedListForEachDuration() {
          LinkedList<Integer> testList = new LinkedList<Integer>();
          for (int item = 0; item < m_size; item++) {
               testList.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (Integer item : testList) {
               builder.append(item);
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getLinkedListIteratorDuration() {
          LinkedList<Integer> testList = new LinkedList<Integer>();
          for (int item = 0; item < m_size; item++) {
               testList.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          Iterator<Integer> iterator = testList.iterator();
          while(iterator.hasNext()) {
               builder.append(iterator.next());
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getVectorForLoopDuration() {
          Vector<Integer> testVector = new Vector<Integer>();
          for (int item = 0; item < m_size; item++) {
               testVector.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (int index = 0; index < m_size; index++) {
               builder.append(testVector.get(index));
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getVectorForEachDuration() {
          Vector<Integer> testVector = new Vector<Integer>();
          for (int item = 0; item < m_size; item++) {
               testVector.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          for (Integer item : testVector) {
               builder.append(item);
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
     public long getVectorIteratorDuration() {
          Vector<Integer> testVector = new Vector<Integer>();
          for (int item = 0; item < m_size; item++) {
               testVector.add(item);
          StringBuilder builder = new StringBuilder();
          long start = System.nanoTime();
          Iterator<Integer> iterator = testVector.iterator();
          while(iterator.hasNext()) {
               builder.append(iterator.next());
          long end = System.nanoTime();
          System.out.println(builder.length());
          return end - start;
      * @param args
     public static void main(String[] args) {
          IterationPerformanceTest test = new IterationPerformanceTest(1000000);
          System.out.println("\n\nRESULTS:");
          long arrayForLoop = test.getArrayForLoopDuration();
          long arrayForEach = test.getArrayForEachDuration();
          long arrayListForLoop = test.getArrayListForLoopDuration();
          long arrayListForEach = test.getArrayListForEachDuration();
          long arrayListIterator = test.getArrayListIteratorDuration();
//          long linkedListForLoop = test.getLinkedListForLoopDuration();
          long linkedListForEach = test.getLinkedListForEachDuration();
          long linkedListIterator = test.getLinkedListIteratorDuration();
          long vectorForLoop = test.getVectorForLoopDuration();
          long vectorForEach = test.getVectorForEachDuration();
          long vectorIterator = test.getVectorIteratorDuration();
          System.out.println("Array      for-loop: " + getPercentage(arrayForLoop, arrayForLoop) + "% ("+getDuration(arrayForLoop)+" sec)");
          System.out.println("Array      for-each: " + getPercentage(arrayForLoop, arrayForEach) + "% ("+getDuration(arrayForEach)+" sec)");
          System.out.println("ArrayList for-loop: " + getPercentage(arrayForLoop, arrayListForLoop) + "% ("+getDuration(arrayListForLoop)+" sec)");
          System.out.println("ArrayList for-each: " + getPercentage(arrayForLoop, arrayListForEach) + "% ("+getDuration(arrayListForEach)+" sec)");
          System.out.println("ArrayList iterator: " + getPercentage(arrayForLoop, arrayListIterator) + "% ("+getDuration(arrayListIterator)+" sec)");
//          System.out.println("LinkedList for-loop: " + getPercentage(arrayForLoop, linkedListForLoop) + "% ("+getDuration(linkedListForLoop)+" sec)");
          System.out.println("LinkedList for-each: " + getPercentage(arrayForLoop, linkedListForEach) + "% ("+getDuration(linkedListForEach)+" sec)");
          System.out.println("LinkedList iterator: " + getPercentage(arrayForLoop, linkedListIterator) + "% ("+getDuration(linkedListIterator)+" sec)");
          System.out.println("Vector     for-loop: " + getPercentage(arrayForLoop, vectorForLoop) + "% ("+getDuration(vectorForLoop)+" sec)");
          System.out.println("Vector     for-each: " + getPercentage(arrayForLoop, vectorForEach) + "% ("+getDuration(vectorForEach)+" sec)");
          System.out.println("Vector     iterator: " + getPercentage(arrayForLoop, vectorIterator) + "% ("+getDuration(vectorIterator)+" sec)");
     private static NumberFormat percentageFormat = NumberFormat.getInstance();
     static {
          percentageFormat.setMinimumIntegerDigits(3);
          percentageFormat.setMaximumIntegerDigits(3);
          percentageFormat.setMinimumFractionDigits(2);
          percentageFormat.setMaximumFractionDigits(2);
     private static String getPercentage(long base, long value) {
          double result = (double) value / (double) base;
          return percentageFormat.format(result * 100.0);
     private static NumberFormat durationFormat = NumberFormat.getInstance();
     static {
          durationFormat.setMinimumIntegerDigits(1);
          durationFormat.setMaximumIntegerDigits(1);
          durationFormat.setMinimumFractionDigits(4);
          durationFormat.setMaximumFractionDigits(4);
     private static String getDuration(long nanos) {
          double result = (double)nanos / (double)1000000000;
          return durationFormat.format(result);
}

Performance problems with new Java Tiger style recommendations

Performance problems with jdk 1.5 on Linux plattform
(not tested on Windows, might be the same)
using the new style recommendations.
I need fast Vector loops for high speed mathematical calculations, some
hints about the fastest way to program that loop would be also great!
After refactoring using the new features from java 1.5 (as recommended from
SUN) I lost performance significantly:
using a vector:
public Vector<unit> units;
The new code (recommended from SUN for Java Tiger for redesign):
for (unit u: units) u.accumulate();
runs more than 30% slower than the old code:
for (int i = 0; i < units.size(); i++) units.elementAt(i).accumulate();
I expected the opposite.
Is there any information available that helps?
The following additional information I got from Mr. Shankar Unni:
I got some fairly anomalous results comparing ArrayList and Vector: for the
1.5-style loops, ArrayList was faster then Vector, but for a loop with get()
calls, Vector was faster. Vector was even faster than that using
elementAt(), which was a surprise:
For a million summing iterations over a 100-element array:
vector elementAt loop took 3446 ms.
vector get loop took 3796 ms.
vector iterator loop took 5469 ms.
arraylist get loop took 4136 ms.
arraylist iterator loop took 4668 ms.

If your topic doesn't change, please stay in your original post.

Performance problems with SAP GUI 7.10 and BEx 3.5 Patch 400?

Hi everybody,
we installed SAP GUI 7.10 and BEx 3.5 Patch 400 and detected hugh performance problems with this version in comparison to the SAP GUI 6.40 and BEx 3.5 or BEx 7.0 Patch 800.
Does anybody detect the same problems?
Best regards,
Ulli

Most important question when you are talking about performance-issues:
which OC are you working on and which excel version?
ciao
Joke

Performance Problems with "For all Entries" and a big internal table

We have big Performance Problems with following Statement:
SELECT * FROM zeedmt_zmon INTO TABLE gt_zmon_help
FOR ALL ENTRIES IN gt_zmon_help
    WHERE
    status = 'IAI200' AND
    logdat IN gs_dat AND
    ztrack = gt_zmon_help-ztrack.
In the internal table gt_zmon_help are over 1000000 entries.
Anyone an Idea how to improve the Performance?
Thank you!

>
Matthias Weisensel wrote:
> We have big Performance Problems with following Statement:
>
>
SELECT * FROM zeedmt_zmon INTO TABLE gt_zmon_help
>   FOR ALL ENTRIES IN gt_zmon_help
>     WHERE
>     status = 'IAI200' AND
>     logdat IN gs_dat AND
>     ztrack = gt_zmon_help-ztrack.
>
> In the internal table gt_zmon_help are over 1000000 entries.
> Anyone an Idea how to improve the Performance?
>
> Thank you!
You can't expect miracles. With over a million entries in your itab any select is going to take a bit of time. Do you really need all these records in the itab? How many records is the select bringing back? I'm assuming that you have got and are using indexes on your ZEEDMT_ZMON table.
In this situation, I'd first of all try to think of another way of running the query and restricting the amount of data, but if this were not possible I'd just run it in the background and accept that it is going to take a long time.

Performance problems with EP 6 and MS IE

Hi everybody,
since a couple of days, we are facing a sever performance problem with our SAP EP 6.0. When I access the system with MS Internet Explorer 6.0, it takes 5-10 minutes after the Login. With Firefox Browser, the performance is ok. Therefore I assume that it must be a problem with the IE settings. Does anybody know a solution?
Best regards,
Michael

There are a few things that this could be. I've seen the setting "Empty Temporary Internet Files folder when browser is closed" cause a lot of performance problems (This is in the advanced settings in your IE).
This will cause your cache to be cleared out each time the browser is closed and cause a lot more data to be downloaded each time you login to the system.
For more analysis I'd recommend putting a tool like HTTPWatch into your IE browser and seeing which requests are using the most time.

Performance problems with File Adapter and XI freeze

Hi NetWeaver XI geeks,
We are deploying a XI based product and encounter some huge performance problems. Here after the scenario and the issues:
- NetWeaver XI 2004
- SAP 4.6c
- Outbound Channel
- No mapping used and only the iDocs Adapter is involved in the pipeline processing
- File Adapter
- message file size < 2Ko
We have zeroed down the problem to Idoc adapters performance.
We are using a file channel and every 15 seconds a file in a valid Idoc format is placed in a folder, Idoc adapter picks up the file from this folder and sends it to the SAP R/3 instance.
For few minutes (approx 5 mins) it works (the CPU usage is less then 20% even if processing time seems huge : <b>5sec/msg</b>) but after this time the application gets blocked and the CPU gets overloaded at 100% (2 processes disp_worker.exe at 50% each).
If we inject several files in the source folder at the same time or if we decrease the time gap (from 15 seconds to 10 seconds) between creation of 2 Idoc files , the process blocks after posting 2-3 docs to SAP R/3.
Could you point us some reasons that could provoke that behavior?
Basically looking for some help in improving performance of the Idoc adapter.
Thanks in advance for your help and regards,
Adalbert

Hi Bhavesh,
Thanks for your suggestions. We will test...
We wonder if the hardware is not the problem of this extremely poor performance.
Our XI server is:
     Windows 2003 Server
     Processors: 2x3GHZ
     RAM: 4GB (the memory do not soak)
The messages are well formed iDocs = single line INVOICES.
Some posts are talking 2000 messages processed in some seconds... whereas we got 5 sec per message.
Tnanks for your help.
Adalbert

Problem with a view in XK01 transaction

Hi All,
I am working on upload conversion for Vendor Master. While doing conversion, i am getting a problem with a Contact person view in XK01 transaction. In contact person view the telephone field column sometimes allowing to add data ,sometimes it's not allowing data which results an error in conversion program saying that the telephone field in not an input field. I don't know why the view is showing the telephone field like that.
Can any one suggest the solution for this problem. I know this is configuration problem with a view but i posted in ABAP forums.
Thanks

Hi Ben,
I assume that you are writing a BDC program to upload contact person information. If so, you are trying to populate a table control here. Please check to see if you are calculating the index to assign values to the correct rows.
if you are calculating index in your program then i think it should be configuration problem as you said.
Thanks,
Ganesh.

HST60: Huge Performance Problem with VAPI Views

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