Weird performance issues

I just ran this program here:
http://www-128.ibm.com/developerworks/db2/library/techarticle/dm-0604kesic/#java
but my performance when generating a cypher is on avg. 2750 ms compared to 407 ms as listed on the web page.
Can some else confirm that the output on the web page is wrong, or explain why it is right. Seems a bit high to me.
Thanks.

Never mind, figured it out

Similar Messages

30EA3- 2.*: Weird performance issues for editing objects

Hi,
I noticed weird performance issues for editing objects: when right-clicking on them in the navigator tree and selecting Edit, you get the old progress dialog "Connected to database XXX". This stays on screen a lot longer than it ever did (last sequence I edited over 30 seconds!).
Cancelling displays a "Error retrieving schemas" dialog, but then opens the Edit dialog correctly. No further side effects noticed, so I think sqldev is adding useless overhead here.
If confirmed, can this be bugged and/or fixed by production?
Thanks,
K.

Yes, I mean in context of other hangs reported. This one is a nasty performance issue, but IMO the others are real show stoppers.
Atomic steps are easy; any* Edit (object) action inside the context menu of the navigator or the Edit button of the object viewer.
I took a lot of dumps (every second or so) and came to these findings:
Full thread dump Java HotSpot(TM) Client VM (14.2-b01 mixed mode):
"ProgressBarThread" prio=6 tid=0x049de000 nid=0x1674 runnable [0x056ff000]
   java.lang.Thread.State: RUNNABLE
        at oracle.jdbc.driver.T2CStatement.t2cDefineFetch(Native Method)
        at oracle.jdbc.driver.T2CPreparedStatement.doDefineFetch(T2CPreparedStatement.java:818)
        at oracle.jdbc.driver.T2CPreparedStatement.executeForRows(T2CPreparedStatement.java:746)
        at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1100)
        at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1186)
        at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3381)
        at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3425)
        - locked <0x1828f7f0> (a oracle.jdbc.driver.T2CConnection)
        at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1202)
        at oracle.javatools.db.execute.QueryWrapper.executeQueryImpl(QueryWrapper.java:280)
        at oracle.javatools.db.execute.QueryWrapper.access$000(QueryWrapper.java:76)
        at oracle.javatools.db.execute.QueryWrapper$QueryExecutionRunnable.runImpl(QueryWrapper.java:390)
        - locked <0x1828f7f0> (a oracle.jdbc.driver.T2CConnection)
        at oracle.javatools.db.execute.StatementWrapper$ExecutionRunnable.run(StatementWrapper.java:692)
        - locked <0x10c504c0> (a oracle.javatools.db.execute.QueryWrapper$QueryExecutionRunnable)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper.runAndLog(ProgressBarExecutionWrapper.java:136)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper.access$000(ProgressBarExecutionWrapper.java:38)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper$R.run(ProgressBarExecutionWrapper.java:180)
        at oracle.ide.dialogs.ProgressBar.run(ProgressBar.java:655)
        at java.lang.Thread.run(Thread.java:619)
"pool-2-thread-2" prio=6 tid=0x06795400 nid=0xa58 waiting on condition [0x073ef000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for <0x131fded0> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"pool-4-thread-1" prio=6 tid=0x06654400 nid=0xa08 waiting on condition [0x05dff000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for <0x18334e28> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:1963)
        at java.util.concurrent.DelayQueue.take(DelayQueue.java:164)
        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:583)
        at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:576)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"WeakDataReference polling" prio=2 tid=0x064de800 nid=0xc58 in Object.wait() [0x0eb3f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x18335088> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at oracle.ide.util.WeakDataReference$Cleaner.run(WeakDataReference.java:88)
        at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x04decc00 nid=0x1248 waiting on condition [0x0ea3f000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
        at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
        at java.lang.Thread.run(Thread.java:619)
"IconOverlayTracker Timer" prio=6 tid=0x063e5400 nid=0x16fc in Object.wait() [0x076ef000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.util.TimerThread.mainLoop(Timer.java:483)
        - locked <0x180c2840> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"WaitCursor-Timer" prio=6 tid=0x04e39c00 nid=0x910 in Object.wait() [0x074ef000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.util.TimerThread.mainLoop(Timer.java:483)
        - locked <0x1792d840> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"Native Directory Watcher" prio=2 tid=0x04e38400 nid=0x12b8 runnable [0x062ef000]
   java.lang.Thread.State: RUNNABLE
        at oracle.ide.natives.NativeHandler.enterWatcherThread(Native Method)
        at oracle.ide.natives.NativeHandler$2.run(NativeHandler.java:252)
        at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x04d86c00 nid=0x12ac waiting on condition [0x061af000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
        at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
        at java.lang.Thread.run(Thread.java:619)
"Background Parser" prio=6 tid=0x04d82800 nid=0x1240 waiting on condition [0x05eff000]
   java.lang.Thread.State: TIMED_WAITING (sleeping)
        at java.lang.Thread.sleep(Native Method)
        at oracle.dbtools.raptor.plsql.BackgroundParser$1.construct(BackgroundParser.java:112)
        at oracle.dbtools.raptor.utils.NamedSwingWorker$2.run(NamedSwingWorker.java:115)
        at java.lang.Thread.run(Thread.java:619)
"TextBufferScavenger" prio=6 tid=0x04d81400 nid=0x10ec in Object.wait() [0x05cff000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x1729c0a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x1729c0a8> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at oracle.ide.model.TextNode$FacadeBufferReference$PollingThread.run(TextNode.java:1949)
"BaseTreeExplorer.NodeOpeningExecutor" prio=6 tid=0x04ba0400 nid=0x11bc waiting on condition [0x05aff000]
   java.lang.Thread.State: WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for <0x131a1910> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
        at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
        at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1925)
        at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:358)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:947)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"pool-2-thread-1" prio=6 tid=0x04c1c400 nid=0x11b8 waiting on condition [0x059ff000]
   java.lang.Thread.State: TIMED_WAITING (parking)
        at sun.misc.Unsafe.park(Native Method)
        - parking to wait for <0x131fded0> (a java.util.concurrent.SynchronousQueue$TransferStack)
        at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
        at java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:424)
        at java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:323)
        at java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:874)
        at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
"Scheduler" daemon prio=6 tid=0x04b9a800 nid=0x11b0 in Object.wait() [0x058ff000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at oracle.dbtools.raptor.backgroundTask.TaskLinkedList.takeNextTask(TaskLinkedList.java:47)
        - locked <0x131a1ba0> (a oracle.dbtools.raptor.backgroundTask.TaskLinkedList)
        at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$SchedulerThread.run(RaptorTaskManager.java:422)
"TimerQueue" daemon prio=6 tid=0x0445b000 nid=0x10fc in Object.wait() [0x057ff000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at javax.swing.TimerQueue.run(TimerQueue.java:236)
        - locked <0x12f7c028> (a javax.swing.TimerQueue)
        at java.lang.Thread.run(Thread.java:619)
"ChangeSetService" prio=2 tid=0x049d0800 nid=0x1060 in Object.wait() [0x053ff000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x12e140c8> (a oracle.jdevimpl.vcs.changeset.ChangeSetService)
        at java.lang.Object.wait(Object.java:485)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService.awaitEvents(ChangeSetService.java:178)
        - locked <0x12e140c8> (a oracle.jdevimpl.vcs.changeset.ChangeSetService)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService.eventLoop(ChangeSetService.java:199)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService.access$200(ChangeSetService.java:56)
        at oracle.jdevimpl.vcs.changeset.ChangeSetService$2.run(ChangeSetService.java:138)
        at java.lang.Thread.run(Thread.java:619)
"TimedCache-Timer" daemon prio=6 tid=0x03af9c00 nid=0x414 in Object.wait() [0x03fdf000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.util.TimerThread.mainLoop(Timer.java:509)
        - locked <0x12869c58> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"JarIndex Timer" daemon prio=6 tid=0x03945400 nid=0x171c in Object.wait() [0x042df000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.util.TimerThread.mainLoop(Timer.java:509)
        - locked <0x127d85a8> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)
"AWT-EventQueue-0" prio=6 tid=0x030f4800 nid=0x1684 in Object.wait() [0x041de000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.awt.EventQueue.getNextEvent(EventQueue.java:479)
        - locked <0x127d8658> (a java.awt.EventQueue)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:236)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
        at java.awt.Dialog$1.run(Dialog.java:1045)
        at java.awt.Dialog$3.run(Dialog.java:1097)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.Dialog.show(Dialog.java:1095)
        at java.awt.Component.show(Component.java:1563)
        at java.awt.Component.setVisible(Component.java:1515)
        at java.awt.Window.setVisible(Window.java:841)
        at java.awt.Dialog.setVisible(Dialog.java:985)
        at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:395)
        at oracle.bali.ewt.dialog.JEWTDialog.runDialog(JEWTDialog.java:356)
        at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:352)
        at oracle.ide.dialogs.ProgressBar.start(ProgressBar.java:229)
        at oracle.ideimpl.db.ProgressBarExecutionWrapper.execute(ProgressBarExecutionWrapper.java:108)
        at oracle.javatools.db.execute.StatementWrapper$ExecutionProxy.doExecute(StatementWrapper.java:647)
        at oracle.javatools.db.execute.StatementWrapper$ExecutionProxy.access$200(StatementWrapper.java:585)
        at oracle.javatools.db.execute.StatementWrapper.doExecute(StatementWrapper.java:307)
        at oracle.javatools.db.execute.QueryWrapper.executeQuery(QueryWrapper.java:215)
        at oracle.javatools.db.dictionary.DictionaryDatabase.listObjectsImpl(DictionaryDatabase.java:323)
        at oracle.javatools.db.ora.BaseOracleDatabase.listObjectsImpl(BaseOracleDatabase.java:524)
        at oracle.javatools.db.AbstractDBObjectProvider.listSchemas(AbstractDBObjectProvider.java:859)
        at oracle.ide.db.dialogs.BaseDBEditorFactory.createNamespace(BaseDBEditorFactory.java:503)
        at oracle.ide.db.dialogs.BaseDBEditorFactory.editDBObject(BaseDBEditorFactory.java:357)
        at oracle.ide.db.dialogs.AbstractDBEditorFactory.editDBObject(AbstractDBEditorFactory.java:332)
        at oracle.ide.db.dialogs.BaseDBEditorFactory.editDBObject(BaseDBEditorFactory.java:54)
        at oracle.ide.db.dialogs.AbstractDBEditorFactory.editDBObject(AbstractDBEditorFactory.java:314)
        at oracle.dbtools.raptor.utils.DataBaseNodeUtil.editNodeWizard(DataBaseNodeUtil.java:45)
        at oracle.dbtools.raptor.oviewer.xmleditor.XMLBasedEditor.handleEvent(XMLBasedEditor.java:152)
        at oracle.ide.controller.IdeAction.performAction(IdeAction.java:531)
        at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:886)
        at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:503)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6263)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2475)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
"AWT-Shutdown" prio=4 tid=0x030e6400 nid=0x1680 in Object.wait() [0x040df000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:259)
        - locked <0x127d8718> (a java.lang.Object)
        at java.lang.Thread.run(Thread.java:619)
"AWT-Windows" daemon prio=6 tid=0x03abb400 nid=0x1610 runnable [0x03edf000]
   java.lang.Thread.State: RUNNABLE
        at sun.awt.windows.WToolkit.eventLoop(Native Method)
        at sun.awt.windows.WToolkit.run(WToolkit.java:291)
        at java.lang.Thread.run(Thread.java:619)
"Java2D Disposer" daemon prio=10 tid=0x03a97400 nid=0x15f8 in Object.wait() [0x03cdf000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x127d8810> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at sun.java2d.Disposer.run(Disposer.java:125)
        at java.lang.Thread.run(Thread.java:619)
"Low Memory Detector" daemon prio=6 tid=0x030d1c00 nid=0x15dc runnable [0x00000000]
   java.lang.Thread.State: RUNNABLE
"CompilerThread0" daemon prio=10 tid=0x030cb800 nid=0x15d8 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE
"Attach Listener" daemon prio=10 tid=0x030ca000 nid=0x15d4 runnable [0x00000000]
   java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=10 tid=0x030c8c00 nid=0x15d0 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE
"Finalizer" daemon prio=8 tid=0x030b9c00 nid=0x15c8 in Object.wait() [0x0343f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
        - locked <0x12770298> (a java.lang.ref.ReferenceQueue$Lock)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x030b5000 nid=0x15c4 in Object.wait() [0x0333f000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
        - locked <0x12770320> (a java.lang.ref.Reference$Lock)
"main" prio=6 tid=0x00967800 nid=0x1504 waiting on condition [0x00000000]
   java.lang.Thread.State: RUNNABLE
"VM Thread" prio=10 tid=0x030b1000 nid=0x15c0 runnable
"VM Periodic Task Thread" prio=10 tid=0x030d3c00 nid=0x15e0 waiting on condition
JNI global references: 2645
Heap
def new generation   total 12544K, used 6205K [0x10010000, 0x10da0000, 0x12770000)
eden space 11200K, 53% used [0x10010000, 0x105e2ff0, 0x10b00000)
from space 1344K, 18% used [0x10c50000, 0x10c8c7b8, 0x10da0000)
to   space 1344K,   0% used [0x10b00000, 0x10b00000, 0x10c50000)
tenured generation   total 165468K, used 99280K [0x12770000, 0x1c907000, 0x30010000)
   the space 165468K, 59% used [0x12770000, 0x18864308, 0x18864400, 0x1c907000)
compacting perm gen total 50432K, used 50210K [0x30010000, 0x33150000, 0x38010000)
   the space 50432K, 99% used [0x30010000, 0x33118aa8, 0x33118c00, 0x33150000)
No shared spaces configured.- In the beginning of the waiting time, the "locked <0x10c504c0>" in the "ProgressBarThread" changed (at least once) to "locked <0x10c51da0>".
- Then halfway the waiting time, the "pool-2-thread-1" disappeared, then "pool-2-thread-2" shortly after.
- Then the "TimedCache-Timer" changed to
"TimedCache-Timer" daemon prio=6 tid=0x03af9c00 nid=0x414 in Object.wait() [0x03fdf000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java:485)
        at java.util.TimerThread.mainLoop(Timer.java:483)
        - locked <0x12869c58> (a java.util.TaskQueue)
        at java.util.TimerThread.run(Timer.java:462)- Then near the end, the "locked <0x10c51da0>" in the "ProgressBarThread" changed to "locked <0x10b01da0>", then to "locked <0x10c51da0>".
Hope that helps,
K.

SQL Performance issue: Using user defined function with group by

Hi Everyone,
im new here and I really could need some help on a weird performance issue. I hope this is the right topic for SQL performance issues.
Well ok, i create a function for converting a date from timezone GMT to a specified timzeone.
CREATE OR REPLACE FUNCTION I3S_REP_1.fnc_user_rep_date_to_local (date_in IN date, tz_name_in IN VARCHAR2) RETURN date
IS
tz_name VARCHAR2(100);
date_out date;
BEGIN
SELECT
to_date(to_char(cast(from_tz(cast( date_in AS TIMESTAMP),'GMT')AT
TIME ZONE (tz_name_in) AS DATE),'dd-mm-yyyy hh24:mi:ss'),'dd-mm-yyyy hh24:mi:ss')
INTO date_out
FROM dual;
RETURN date_out;
END fnc_user_rep_date_to_local;The following statement is just an example, the real statement is much more complex. So I select some date values from a table and aggregate a little.
select
stp_end_stamp,
count(*) noi
from step
where
stp_end_stamp
BETWEEN
to_date('23-05-2009 00:00:00','dd-mm-yyyy hh24:mi:ss')
AND
to_date('23-07-2009 00:00:00','dd-mm-yyyy hh24:mi:ss')
group by
stp_end_stampThis statement selects ~70000 rows and needs ~ 70ms
If i use the function it selects the same number of rows ;-) and takes ~ 4 sec ...
select
fnc_user_rep_date_to_local(stp_end_stamp,'Europe/Berlin'),
count(*) noi
from step
where
stp_end_stamp
BETWEEN
to_date('23-05-2009 00:00:00','dd-mm-yyyy hh24:mi:ss')
AND
to_date('23-07-2009 00:00:00','dd-mm-yyyy hh24:mi:ss')
group by
fnc_user_rep_date_to_local(stp_end_stamp,'Europe/Berlin')I understand that the DB has to execute the function for each row.
But if I execute the following statement, it takes only ~90ms ...
select
fnc_user_rep_date_to_gmt(stp_end_stamp,'Europe/Berlin','ny21654'),
noi
from
select
stp_end_stamp,
count(*) noi
from step
where
stp_end_stamp
BETWEEN
to_date('23-05-2009 00:00:00','dd-mm-yyyy hh24:mi:ss')
AND
to_date('23-07-2009 00:00:00','dd-mm-yyyy hh24:mi:ss')
group by
stp_end_stamp
)The execution plan for all three statements is EXACTLY the same!!!
Usually i would say, that I use the third statement and the world is in order. BUT I'm working on a BI project with a tool called Business Objects and it generates SQL, so my hands are bound and I can't make this tool to generate the SQL as a subselect.
My questions are:
Why is the second statement sooo much slower than the third?
and
Howcan I force the optimizer to do whatever he is doing to make the third statement so fast?
I would really appreciate some help on this really weird issue.
Thanks in advance,
Andi

Hi,
The execution plan for all three statements is EXACTLY the same!!!Not exactly. Plans are the same - true. They uses slightly different approach to call function. See:
drop table t cascade constraints purge;
create table t as select mod(rownum,10) id, cast('x' as char(500)) pad from dual connect by level <= 10000;
exec dbms_stats.gather_table_stats(user, 't');
create or replace function test_fnc(p_int number) return number is
begin
    return trunc(p_int);
end;
explain plan for select id from t group by id;
select * from table(dbms_xplan.display(null,null,'advanced'));
explain plan for select test_fnc(id) from t group by test_fnc(id);
select * from table(dbms_xplan.display(null,null,'advanced'));
explain plan for select test_fnc(id) from (select id from t group by id);
select * from table(dbms_xplan.display(null,null,'advanced'));Output:
PLAN_TABLE_OUTPUT
Plan hash value: 47235625
| Id | Operation          | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT   |      |    10 |    30 |   162   (3)| 00:00:02 |
|   1 | HASH GROUP BY     |      |    10 |    30 |   162   (3)| 00:00:02 |
|   2 |   TABLE ACCESS FULL| T    | 10000 | 30000 |   159   (1)| 00:00:02 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$1
   2 - SEL$1 / T@SEL$1
Outline Data
/*+
      BEGIN_OUTLINE_DATA
      FULL(@"SEL$1" "T"@"SEL$1")
      OUTLINE_LEAF(@"SEL$1")
      ALL_ROWS
      OPTIMIZER_FEATURES_ENABLE('10.2.0.4')
      IGNORE_OPTIM_EMBEDDED_HINTS
      END_OUTLINE_DATA
Column Projection Information (identified by operation id):
   1 - (#keys=1) "ID"[NUMBER,22]
   2 - "ID"[NUMBER,22]
34 rows selected.
SQL>
Explained.
SQL>
PLAN_TABLE_OUTPUT
Plan hash value: 47235625
| Id | Operation          | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT   |      |    10 |    30 |   162   (3)| 00:00:02 |
|   1 | HASH GROUP BY     |      |    10 |    30 |   162   (3)| 00:00:02 |
|   2 |   TABLE ACCESS FULL| T    | 10000 | 30000 |   159   (1)| 00:00:02 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$1
   2 - SEL$1 / T@SEL$1
Outline Data
/*+
      BEGIN_OUTLINE_DATA
      FULL(@"SEL$1" "T"@"SEL$1")
      OUTLINE_LEAF(@"SEL$1")
      ALL_ROWS
      OPTIMIZER_FEATURES_ENABLE('10.2.0.4')
      IGNORE_OPTIM_EMBEDDED_HINTS
      END_OUTLINE_DATA
Column Projection Information (identified by operation id):
   1 - (#keys=1) "TEST_FNC"("ID")[22]
   2 - "ID"[NUMBER,22]
34 rows selected.
SQL>
Explained.
SQL> select * from table(dbms_xplan.display(null,null,'advanced'));
PLAN_TABLE_OUTPUT
Plan hash value: 47235625
| Id | Operation          | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT   |      |    10 |    30 |   162   (3)| 00:00:02 |
|   1 | HASH GROUP BY     |      |    10 |    30 |   162   (3)| 00:00:02 |
|   2 |   TABLE ACCESS FULL| T    | 10000 | 30000 |   159   (1)| 00:00:02 |
Query Block Name / Object Alias (identified by operation id):
   1 - SEL$F5BB74E1
   2 - SEL$F5BB74E1 / T@SEL$2
Outline Data
/*+
      BEGIN_OUTLINE_DATA
      FULL(@"SEL$F5BB74E1" "T"@"SEL$2")
      OUTLINE(@"SEL$2")
      OUTLINE(@"SEL$1")
      MERGE(@"SEL$2")
      OUTLINE_LEAF(@"SEL$F5BB74E1")
      ALL_ROWS
      OPTIMIZER_FEATURES_ENABLE('10.2.0.4')
      IGNORE_OPTIM_EMBEDDED_HINTS
      END_OUTLINE_DATA
Column Projection Information (identified by operation id):
   1 - (#keys=1) "ID"[NUMBER,22]
   2 - "ID"[NUMBER,22]
37 rows selected.

Y50-70 (432200) performance issue

Hello!
I have a Y50-70 (432200) and I have a weird performance issue.
In a normal usage the notebook works excellently, but just as I start any kind of games the phenomenon appears.
It's like an FPS lag. It last for about 2 seconds and at this time the FPS rates drops down dramatically. In this 2 seconds it can be detected that the temperature of the CPU increases, the CPU takes back from performance and the cooling fan also lowers it's speed. And just as suddenly as this appears it disappears to. And after a few seconds 2-5) it start all over again.
I tried it with several games on different graphic setting from the lowest to the highest, but it happent all the time.
I also tried to update all the drivers and set all the possible performance setting to performance mode, but it doesn't helped. I also use a notebook cooler.
I'm using a Win8.1
Does anyone have any knowledge about this kind of phenomenon? Or any idea how I can get rid of it?

Hi,
I don't think that would be the problem because I have a Western Digital WDC WD10SPCX-24HWST1 in it which isn't a poor one I think. On other hand this notebook is about 3 weeks old, and I don't want to lose my warranty with disassembling it.

Performance issue with brand new intel iMac extreme

I am at a loss to explain a problem I've been having and I thought I might put it out to you guys.
In September I purchased a macbook Pro (2.4 ghz, 4 GB RAM) to use in video editing with Final Cut Pro, and for the most part I've been thrilled. I use 1TB LaCie external drives connected via FW800, and perform Multiclip editing with 4-5 video streams at a time and only on occasion have dropped frames during the editing process.
In December I determined that I needed to have an additional system, and thought a 2.8Ghz Intel iMac extreme would be an excellent choice, since for the same price I could get a little more power in the processor, more hard drive space and a bigger screen to work on. When we picked up the new system in the store (The Grove Apple Store in LA), we had them upgrade the memory to 4GB.
Since day one we have had performance issues, including problems playing streaming and DVD video, severe delays mounting and unmounting drives (firewire and USB) and application images, and freezing while doing even simple tasks like printing or checking email. These problems occur even while there are no external drives are connected. I have none of these issues with the Macbook Pro, which has virtually an identical set of programs installed, and both running the same version of Leopard.
I already took the original iMac back to the store, and they exchanged it, but did not have 4GB sets of RAM in stock so they took the RAM from the original machine and put it in the new one. They said if I continued to have problems then it was most likely the RAM and I should come back when they got more in stock. I DID have the same problems with the new machine, and took it back to the Apple Store and they swapped the memory. It seemed to improve the issue, but now I'm seeing the same severe performance issues again.
All tech support can do is tell me to do a PRAM reset, which seems to improve things very temporarily (but that may be my imagination) or have me restart, which at least has the ability to make the printing of documents capable.
What I'm wondering is if it is likely that the RAM is the issue and I just got another bad batch, or if the iMac has some weird glitch that isn't present in the macbook Pro...?? Or could I have possibly gotten 2 bad systems in a row? It's extremely frustrating, and I KNOW it shouldn't be this way! It's so bad I get better performance out of my single-core G5 tower! How do I get a good working system that operates like it should? Am I better off getting another Macbook Pro? I'd rather not for several reasons...
I have xbench on both the MBP and the iMac and can provide test numbers if they'll help, as well as any other info.
Thank you so much for reading my novella of a post and also for any insight you have!
Best,
Travis

Hi!
I got the same problem with my MacBook when it still was new in may 2006. It was supposed to be one of the faster Laptops around but it was soooo slow it drove me nuts. I can only advise to have a look if there is something hugging up your RAM and run some tests using these programs on your machine:
Xbench:
http://www.macupdate.com/info.php/id/10081
MenuMeters:
http://www.macupdate.com/info.php/id/10451
If they show any unusual results you might have your problem...
As to my problem with the MacBook: I did a complete re-install (writing the harddisk over with zeroes) and suddenly everything was just fine. (But be sure to back all your files before that, I learned this one the hard way.) I know it is just a standard answer, but it worked out for me this time...
Hope this helps in some ways.
Cheers,
Rene

My macbook pro is suddenly having major performance issues

Hi,
I´ve been having some performance issues with my Macbook Pro (late 2006) and was hoping that someone here might be able to help me figure out what it is.
It all started about a month ago with the disc utility giving me an error.
The error said something about the amount of threads being wrong.
I popped in the install dvd and fixed the problem. I also did a complete reinstall and upgraded from leopard to snow leopard.
There was nothing wrong with the S.M.A.R.T.-status of the drive.
At the same time the hardrive error came around my cpu started to choke. The cpu-problem didn´t go away after I repaired the disc and formatted the drive and installed 10.6.
Now it feels like the cpu is running way below it´s capacity. Even the simplest of tasks make my computer choke.
My audio applications are working at about half the speed of what they used to handle. Converting a wave file to mp3 takes about twice as long, and converting a video is even worse.
I haven´t had any problems since I bought it in 2006. It is still running smooth - except for the lack of speed. It´s not really acting weird or being unstable, just slow. Way slower than it is supposed to be (and was before).
And it happened overnight.
I also had a kernel panic last week. But after restarting the system it went away and I haven´t seen it since.
My specs are: C2D 2.16, 3GB RAM, 120GB 5400rpm hdd, OS 10.6.4...
Would really appreciate help of any/every kind!
I fear that this might be the end of my work horse

Well, kind of a good news bad news situation for you.
Bad news, is that your hard drive is dying. Make sure you back things up while you still can. Disk Utility's SMART status is generally just this side of useless I'm afraid. I've seen plenty of drives that are completely toast, that will show up as "Verified".
Good news, is that as repairs go, this is close to as cheap as they get. It's up to you if you want to attempt doing it yourself, but be sure to look for some kind of take apart guide first. Look it over, and if you're even a little unsure, take it somewhere. Shortly after this model they started making it a lot easier to do HDD upgrades, not that it does you a lot of good.
Anyway, even for a system as old as yours, this is a very cost effective repair if everything else is still working fine, and you're satisfied with the system. It's also a good opportunity to upgrade, give yourself a little extra space. No need to go overboard, but maybe a 250GB drive or so. A touch over 2X the space you had before, which can be had on the cheap. Just about any 2.5" SATA drive should work in that system.

Performance issue with Jdeveloper

Hi Guys,
I am experiencing strange performance issue with Jdeveloper 10.1.3.3.0.4157. There are many other threads regarding the performance issue in this forum, but the problem I have is a little bit different.
I have two computers: one is Athlon 3200+ with Vista and another one is P4 dual core 6400 with XP (service pack 2). Both of them have 2GB memory.
I am running the same simple project on both computer, but only the one with Vista has the problem. The problem is very similar to the problem mentioned in the thread:
Re: IDE has become extremely slow?
But it's much worse. It only happens only on JSF pages. Basically, any operations on the JSF pages are very slow. Loading the page, changing the attributes of a button in source editor, or even clicking the items in the design view take forever to run.
The first weird thing is that it may use 100% CPU, but it never recover, which means the 100% CPU usage never stops or when it stops, the Jdeveloper stops responding.
The second weird thing is that the project is not big. Actually, it's very small. The problem started to happen since last week. There are not big changes during the period. The only thing I can say is that we created two more JSF pages.
The third weird thing is that the same project never happened on the P4+XP box. When I open the project on the P4+XP box, it’s always fast and no CPU spike.
Any advises are welcome!
Thanks,
Steven

Hi Guys,
I re-made a simple test project for this problem and now I now always reproduce the problem in JDeveloper on both system (XP & Vista). Everytime I open this jspx file in the source editor and try to scroll up/down the source file, or manually delete an attribute, JDeveloepr will hang and the CPU usage is 0%.
Here is the content of the test file:
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:af="http://xmlns.oracle.com/adf/faces"
xmlns:afh="http://xmlns.oracle.com/adf/faces/html">
<jsp:output omit-xml-declaration="true" doctype-root-element="HTML"
doctype-system="http://www.w3.org/TR/html4/loose.dtd"
doctype-public="-//W3C//DTD HTML 4.01 Transitional//EN"/>
<jsp:directive.page contentType="text/html;charset=windows-1252"/>
<f:view>
<afh:html binding="#{backing_streettypedetail.html1}" id="html1">
<afh:head title="streettypedetail"
binding="#{backing_streettypedetail.head1}" id="head1">
<meta http-equiv="Content-Type"
content="text/html; charset=windows-1252"/>
</afh:head>
<afh:body binding="#{backing_streettypedetail.body1}" id="body1">
<af:messages binding="#{backing_streettypedetail.messages1}"
id="messages1"/>
<h:form binding="#{backing_streettypedetail.form1}" id="form1">
<af:panelForm binding="#{backing_streettypedetail.panelForm1}"
id="panelForm1">
<af:inputText value="#{bindings.streetTypeID.inputValue}"
label="#{bindings.streetTypeID.label}"
required="#{bindings.streetTypeID.mandatory}"
columns="#{bindings.streetTypeID.displayWidth}"
binding="#{backing_streettypedetail.inputText1}"
id="inputText1">
<af:validator binding="#{bindings.streetTypeID.validator}"/>
</af:inputText>
<af:inputText value="#{bindings.description.inputValue}"
label="#{bindings.description.label}"
required="#{bindings.description.mandatory}"
columns="#{bindings.description.displayWidth}"
binding="#{backing_streettypedetail.inputText2}"
id="inputText2">
<af:validator binding="#{bindings.description.validator}"/>
</af:inputText>
<af:inputText value="#{bindings.abbr.inputValue}"
label="#{bindings.abbr.label}"
required="#{bindings.abbr.mandatory}"
columns="#{bindings.abbr.displayWidth}"
binding="#{backing_streettypedetail.inputText3}"
id="inputText3">
<af:validator binding="#{bindings.abbr.validator}"/>
</af:inputText>
<f:facet name="footer">
<h:panelGroup binding="#{backing_streettypedetail.panelGroup1}"
id="panelGroup1">
<af:commandButton text="Save"
binding="#{backing_streettypedetail.saveButton}"
id="saveButton"
actionListener="#{bindings.mergeEntity.execute}"
action="#{userState.retrieveReturnNavigationRule}"
disabled="#{!bindings.mergeEntity.enabled}"
partialSubmit="false">
<af:setActionListener from="#{true}"
to="#{userState.refresh}"/>
</af:commandButton>
<af:commandButton text="Cancel"
binding="#{backing_streettypedetail.cancelButton}"
action="#{userState.retrieveReturnNavigationRule}"
id="cancelButton">
<af:setActionListener from="#{false}"
to="#{userState.refresh}"/>
</af:commandButton>
</h:panelGroup>
</f:facet>
</af:panelForm>
</h:form>
</afh:body>
</afh:html>
</f:view>

</jsp:root>
Can anybody take a look at the file and let me know what's wrong with it?
Thanks in advance.
Steven

Experiencing strange performance issues after a hard drive failure - Help!

I bought my mid-2012 i5 Macbook Pro in December of 2012. I realized when shopping for computers that I wanted an SSD installed, but that it would be a lot cheaper if I bought the SSD and installed it rather than customizing it in the Apple Store. So I bought a nice Samsung 128GB SSD (820 or 840 - can't remember which) and did the installation. I went ahead and installed two 4GB sticks of RAM while I was at it. Everything was just dandy: my boot time was just under 9 seconds, and all of my data-heavy apps booted in no-time at all. Then all **** broke loose.
About two weeks ago, I opened my computer and I got the dreaded "? File Folder" notification with a gray screen. I immediately thought hard drive failure. No matter how many times I tried to boot, the computer just would not talk to the SSD anymore. I used Internet Recovery to get into my Disk Utility, and the entire partition was gone. I assumed the worst but wanted to be sure - I bought a hard drive enclosure and hooked the SSD up to an older Macbook, and lo and behold: it worked perfectly. I was not only able to recover data, but I could write data to the drive. Nothing appeared wrong with the drive when I plugged it into the old Macbook, but my newer Macbook still would not recognize it. Even my fiance's Windows 7 PC recognized the drive as "?" (since it was formatted for Mac, but hey - it recognized that it existed!).
I decided to re-install the original HDD that came with the 2012 Macbook Pro (the one I removed in favor of the SSD). I was able to re-install the OS and I can boot up at will, but everything is different. The performance issues are extremely noticeable. I can't have more than two programs running at one time without the spinning wheel of death appearing. My boot time went from 9 seconds to 2 minutes. I know that SSDs increase performance, so there is some slight performance downgrade to be expected since I am using a mechanical drive now -- but these are not normal issues. Sometimes I can't even type a web address into Safari without the wheel appearing. iTunes, and specifically the App Store, take minutes to open - and I have no media is on iTunes.
Here's the thing: I have tried just about anything to fix this problem that Google can pull up. I've verified the HDD, I've booted into Safe Mode, reset RAM and cache, run benchmarks and other performance tests, entered all sorts of weird language into Command Prompt, and studied Activity Monitor - I can't find a single red flag that would indicate anything being wrong. It appears to be a perfectly functioning, updated computer.
I'm thinking a piece of hardware failed that triggered the error with the SSD. I'm not really sure though since all of my performance tests indicate perfectly functioning hardware. I'm a little afraid to take it to the Apple store because I know they'll tell me it's my fault for opening the computer and replacing the hard drive in the first place.
Any ideas? At this point anything to salvage this computer would be helpful.

Spin Cycle,
were those other computers which were able to recognize your SSD in its external enclosure also Macs? Do you know if your SSD has its most recent firmware revision installed? (If it doesn’t, its installer can be downloaded from the Samsung SSD firmware page for burning onto a bootable DVD.) I haven’t used the 830 myself, so I don’t know what its reputation is with Macs. I have an 840 PRO in my MacBook Pro, which has been trouble-free for me, but my understanding is that the 840 EVO has had trouble with Macs in its earlier firmware revisions — so I’m wondering if the 830 has a known track record with Macs, good or bad.

Performance issue while wrapping the sql in pl/sql block

Hi All,
I am facing performance issue in a query while wrapping the sql in pl/sql block.
I have a complex view. while quering the view using
Select * from v_csp_tabs(Name of View I am using), it is taking 10 second to fetch 50,000 records.
But when I am using some conditions on the view, Like
Select * from v_csp_tabs where clientid = 500006 and programid = 1 and vendorid = 1, it is taking more then 250 secs. to return the result set.
now the weird part is this is happening only for one programID, that is 1
I am using Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
Any one please suggest what are the things i need to check..
I am sorry, I could not provide you the explain plan, because this is in production and I do not have enough prevelage.
Thank you in advance.
Thnx,
Bits

Bits wrote:
I have a complex view. while quering the view using
Select * from v_csp_tabs(Name of View I am using), it is taking 10 second to fetch 50,000 records.
But when I am using some conditions on the view, Like
Select * from v_csp_tabs where clientid = 500006 and programid = 1 and vendorid = 1, it is taking more then 250 secs. to return the result set.That's one problem with views - you never know how they will be used in the future, nor what performance implications variant uses can have.
>
now the weird part is this is happening only for one programID, that is 1
Any one please suggest what are the things i need to check..
I am sorry, I could not provide you the explain plan, because this is in production and I do not have enough prevelage.I understand what you are saying - I have worked at similar sites. HiddenName is correct in suggesting that you need to get execution plans but sometimes getting privileges from the DBA group is simply Not Going To Happen. Its wrong but that's the way it is. Follow through on HiddenName's suggested to get help from somebody who has the privleges needed
Post the query that view view is executing. Desk checking a query is NOT ideal but is one thing we can do.
I don't suppose you can see V$ views on production - V$SQL and V$SQL_PLAN (probably not if you can't generate plans, but its worth a thought)

Performance issues logging on to Workspace 11.1.2.1

Hi All,
We have a distributed install of 11.1.2.1 (2 HSS, 3 PLN, 3HFM, 3 Workspace, 2 FDM servers) and facing significant performance issues:
- Logging on to the Workspace as an external user takes 5 min
- Logging on to the AAS console as an external user takes over 2 min
- Opening HBRs in AAS takes a couple of minutes
- Logging on to HSS as an external user takes over a min
Logging on as a native user takes around 30 seconds.
We have disabled compoments we do not use under the Workspace server properties and applied patch Set Exception (PSE): 13327628 which addressed the following perfomance issues:
• 12913216 – Intermittent login error is observed while attempting to log into EPM System Workspace. Workspace displays the error message “You must supply a valid User Name and Password to log onto the system.” However, user can log in by clicking OK.
• 13341789 – Poor login performance (delay of 3-5 minutes) is observed at the first user login if Workspace web application has been inactive for an hour. Subsequent login performance is not impacted.
• 13388864 – In deployments where a firewall is configured to time out idle applications (for example, after 30 minutes) users can login once, but subsequent login times out.
In Shared Services we have also set Evict Interval and Allowed Idle Connection Time to 5 mins.
Is there anything else we could try to improve performance?
Thanks for your help.
Regards
Seb

If you already have deactivated the non used services from WS, it's weird. As I can see you may be using an external directory for authenticating, check on these.
* have you checked the response time from the external directory... sometimes for example in Active directory the user hierarchy is too complex to navigate on it. you can use an LDAP tester to see
* Are you using SSL? if yes, try wtihout SSL
* For workspace Start the non used services, and activate back the services in the WS to see if there it improves with all the apps up ( this will help you to narrow the debugging)
* go directly to java based servers, for instance in the shared services server go directly to the port 28080 for interop, instead of going by http server and check if you can login quick or not. This will help you also to isolate the issue (if it's related or not to Workspace).
Hope this help u to narrow your search
Motor

Cache-flush VM-related performance issue

Dear forum,
I've got a peculiar performance issue going on with the BDB pagecache being flushed to disk. I've managed to reproduce the issue perfectly on three out of three quite different systems that I've tried on, so it is at least quite well-defined.
My usage pattern for the database in question is such that I periodically (perhaps once every 10-60 seconds or so) need to read through an amount of values (around 500-2000 or so) from a database containing a rather large amount (in the millions, at least) of keys. There are a few writes for every such batch, but not very many (a couple of tens). The keys that are read each batch are quite random, and very likely to be completely different from batch to batch. The database is a DB_HASH.
When I do that, BDB seems to dirty a lot of pages in the page cache (which I have currently sized at 512 MB so that pages don't have to be forced out from it), from what I can tell by manipulating refcounts and stuff, so all in all, a single batch seems to dirty some 10-40 MB or so of the mmapped cache region. (I check this using pmap -x on Linux.) Note that when I speak of pages and the dirtying of them here, I mean at the VM level, not the BDB level.
A while after this has happened, the VM comes around and wants to flush the dirty pages to disk, so it batches writes of large portions (often the entire set of dirty pages, but sometimes it only does 10-20 MB or so at a time; this detail shouldn't matter) of the dirtied pages to the backing block device. Since the dirty pages are often rather interspersed in the region file, such a flush usually requires a couple of thousands of write ops, so it might sometimes take up to 10-20 seconds for the requests to complete.
If the program, then, again tries to dirty any of the pages while they are waiting to be flushed, which is often the case, the VM will block it until the page in question is flushed. This means that the thread in question might very well be blocked for up to 20 seconds, causing quite annoying wait times.
How to deal with this problem? I've considered trying to put the region files on tmpfs or so, but that seems like such an excessive measure for a problem which, from what I can tell, should be commonplace.
On a very related note, I've noticed a large discrepancy in the I/O performance between the systems I've tried this on. Two of the systems in question manage to carry out some 200-500 write ops per second on my test load, while the third manages closer to 2000-3000 write ops per second, which makes quite a difference. What makes it very weird is that the faster system uses the exact same hard drive as one of the slower systems. I know this isn't exactly a BDB-specific question, but I thought someone around here might have experience in the matter. All three systems use Linux and S-ATA hard disks (not SSDs), but they use different S-ATA host adapters, different kernel versions and are configured in quite different ways.
Thanks for reading my wall of text! I'm sorry for dragging on so long, but I didn't know how to describe the situation more briefly.
Edited by: Dolda2000 on Mar 23, 2013 8:08 AM

As a follow-up on this, it appears that the blocking behavior was introduced in Linux 3.0 to stabilize pages under writeback:
http://lwn.net/Articles/486311/
It seems that the commits that introduced the behavior can be safely patched away, and also that it is due to change in 3.9, but for now, this is not the route I took to solve it.
Rather, I wrote a patch to Berkeley DB to allow me to store the region files in another directory than the environment root directory, and used it to store them in /dev/shm -- that is, on tmpfs, which avoids writeback of the region files altogether.
If you want the patch, it is here for db4.8 (which what Debian Stable uses), and here for 5.1, which is what Debian Testing uses.
(For some reason, the hyperlink format suggested by the forum doesn't seem to be working?)

Heavy performance issues using Adobe Interactive Form PDFs generated by SAP BPM

Dear experts,
we use Adobe Interactive Form PDFs (generated with LiveCycle Designer) as Human Tasks within SAP BPM processes. The PDFs are generated and transmitted correctly, but when they are opened at the receivers PC, Windows freezes for 2-3 minutes, then the PDF opens and can be filled out and sent back. The next PDFs can be opened much faster, but when the PC is restarted, we get the same problem again. We use Adobe Reader XI (11.0.2) on our clients; is their any know performance issue?
Please note, that we have this problem with EVERY Adobe Interactive Form PDF... I created a simple PDF containing just a field and the client PC still freezes. So it can't be in the form or the scripting. Normal static PDFs can be opend without any problems.
Best regards,
David

They haven't really announced it, because there is no product to announce. Rather the opposite.
There are no conversion tools, so far as I know.
XFA forms are a non-starter if you want portability.
AcroForms are a nightmare in themselves, because the functionality is limited in Adobe Reader and varies between absent and weird in other products. No idea about Blackberry support.
You will not find a simple recommendation. Rather, you need to use Acroforms and carefully test everything (EVERYTHING: no assumptions) on every platform you intend to support.
Yes, rather unsatisfactory, but until Adobe realise that the future is platform equivalence or irrelevance, this is where we are.

[SOLVED] Pacman Performance Issue

Hey everybody:
I have a weird performance problem with pacman. When I tell it to download something, it works fine when it is finding the package, figuring out dependencies, and processing the command.
Then, when it gets to downloading, it'll take a few to several minutes to start downloading a package, download it at a normal/acceptable speed, then take a few to several minutes to start downloading the next package.
I'm not sure what's causing this problem but I could see this beeing a nuissance for upgrades and things like that. Or right now, because it's a fresh install and I'm trying to install Gnome, lol. This behavior is also experienced when I'm updating the mirrors (pacman -Syy).
I'm going to let it run overnight where it'll probably be done by the time I get back to work in the morning, but this seems like there's something wrong because I just tried on my laptop (on the same LAN) and it works as fast as I'd ever seen it. In the past, I've never done any optimization or mirror ranking and I haven't experienced this issue before.
Thanks!
Last edited by mrmylanman (2011-06-03 12:41:45)

Well, the install on the desktop was brand new, but they were both working from the same (default) mirror list. I commented out the first few entries, as well as archlinux.org and a few others that seemed far away from their names, and tried it again. Same issue.
I thought it might be an issue with the DNS servers, so I tried pinging google, yahoo, and like xmission and a few others that it may not have cached and they all got resolved pretty quick.
Seems very strange. I remember yum being extremely slow, now that I think about it, but I used Fedora last about 3 years ago now (this was a different building and different internet plan at the time). Apt seemed quick enough (since Fedora I have been dual-booting Windows and Debian).
We have a fiber optic connection at work, not particularly fast at download but has good upload (more important for us), and we have a local DNS caching server. It has caused some problems before, but it seems to have been behaving today (and for several months now).
Thanks again, love the forums and I'm glad to be getting Debian off my work PC (strange as it is, I'm more comfortable with Arch now than I am with Debian).
Last edited by mrmylanman (2011-06-02 22:37:02)

Report Performance Issue - Activity

Hi gurus,
I'm developing an Activity report using Transactional database (Online real time object).
the purpose of the report is to list down all contacts related activities and activities NOT related to Contact by activity owner (user id).
In order to fullfill that requirment I've created 2 report
1) All Activities related to Contact -- Report A
pull in Acitivity ID , Activity Type, Status, Contact ID
2) All Activities not related to Contact UNION All Activities related to Contact (Base report) -- Report B
to get the list of activities not related to contact i'm using Advanced filter based on result of another request which is I think is the part that slow down the query.
<Activity ID not equal to any Activity ID in Report B>
Anyone encountered performance issue due to the advanced filter in analytic before?
any input is really appriciated
Thanks in advanced,
Fina

Fina,
Union is always the last option. If you can get all record in one report, do not use union.
since all records, which you are targeting, are in the activity subject area, it is not nessecery to combine reports. add a column with the following logic
if contact id is null (or = 'Unspecified') then owner name else contact name
Hopefully, this is helping.

Report performance Issue in BI Answers

Hi All,
We have a performance issues with reports. Report is running more than 10 mins. we took query from the session log and ran it in database, at that time it took not more than 2 mins. We have verified proper indexes on the where clause columns.
Could any once suggest to improve the performance in BI answers?
Thanks in advance,

I hope you dont have many case statements and complex calculations that you do in the Answers.
Next thing you need to monitor is how many rows of data that you are trying to retrieve from the query. If the volume is huge then it takes time to do the formatting on the Answers as you are going to dump huge volumes of data. Database(like teradata) returns initially like 1-2000 records if you hit show all records then even db is gonna fair amount of time if you are dumping many records
hope it helps
thanks
Prash

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