Need for garbage collection using Webdynpro Binary Cache?

Dear Sirs,
I am using the Wiki guide, Exporting Table Data Using On-Demand Streams to export table data to Excel. (this is using Webdynpro binary cache)
Everything is working fine, however I would like to check prior to transport to production, if i need to do any garbage collection using this solution.
My biggest fear is if the all the excel files generated are stored forever, thus filling up the disk space or memory and crashing the production server.
Can anyone give me advice ?
best regards,
Jørgen Ruud

Hi
Check This URL
Memory Usage
http://help.sap.com/saphelp_nw04/helpdata/en/98/f73c41325fa831e10000000a1550b0/frameset.htm
Resource Management
http://help.sap.com/saphelp_nw04/helpdata/en/15/d73f41d900db2be10000000a1550b0/frameset.htm
Regards
Chandran S

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Animation gets slow when program needs a Garbage Collect.

So nonetheless, I should probably develop a new animation algorithm, yes?
I am looping through a seperate thread that calls the setSize() methods a bunch of times. Works really nice when memory isnt bad, but when I need to garbage collect, and apparantly java doesnt agree, it gets really slow. Later one is really able to see when a GC is actually done, and it goes back to normal.
Here is my algorithm,
public static boolean raisePanel(final VCMSComponentFrame p, final boolean anim)
 if (p.getState() == VCMSComponentFrame.State.RAISED ||
 p.getState() == VCMSComponentFrame.State.ANIMATING)
 return false;
 new Thread(new Runnable()
 public void run()
 p.setState(VCMSComponentFrame.State.ANIMATING);
 if (anim)
 for (int i = p.getHeight(); i <= FULL_PANEL_HEIGHT; i++)
 try
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 JComponent parent = (JComponent)p.getParent();
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 for (int j = index + 1; j < parent.getComponentCount() && j != 0; j++)
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sierratech wrote:
Only a guess, but this may have something to do with Threads and Swing.
http://java.sun.com/products/jfc/tsc/articles/threads/threads1.html.
Many Swing updates should be called in the Event Dispatch thread, and it looks like you may be calling some of these in your new Thread.
Try using SwingUtilities.invokeLater() and see if that helps. Alternatively, rewrite your code to remove the Thread and do everything in the event Dispatch thread using javax.swing.Timer. Again, just a guessThanks for the Idea, but this option doesnt even show the animation.
One Idea I got from a "Swing Hacks" directory works like this:
Remove the components for animation.
Create an image of the components.
Overide the Paint method.
Animate the images via paint method.
Remove the images.
Add back the components.
But I look at that and my stomach cringes.
Any other Ideas?

API for Garbage Collection

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http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/pdf/illustrator/scrip ting/readme_cs5.txt
As for garbage collection I've never fould the need to use it… I see some like to set variables back to null but again I don't do this…
You would have been better off asking this question in the ID scripting forum… There are several people there who are better qualified to answer some of this…

When using iPhoto can I remove some of the default options such as faces or flagged etc. There are more bits than I need for my basic use.

When using iPhoto can I remove some of the default options such as faces or flagged etc. from the left bar. There are more bits than I need for my basic use.

Hello Susan,
Not sure if I have fully understood your question but have you tried ...
iPhoto > iPhoto help > browse help > view and organise. Perhaps this touches on some of your needs.
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Would you like me to ask the hosts to relocate your question?

Which algirithm is being used by java runtime for garbage collection??

On what basis does java reclaim objects using Garbage Collection ??
and explain the method i.e the step by step basis on how it is being done??

There are various whitepapers and the like on this.
As far as which objects may be collected, it's just any object that isn't referred to - directly or indirectly - by one of the root set of threads in the JVM.
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~Cheers

High cpu usage for garbage collection (uptime vs total gc time)

Hi Team,
We have a very high cpu usage issue in the production.
When we restart the server, the cpu idle time would be around 95% and it comes down as days goes by. Today idle cpu is 30% and it is just 6th day after the server restart.
Environemnt details:
Jrockit version:
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_05-b04)
BEA WebLogic JRockit(TM) 1.4.2_05 JVM R24.4.0-1 (build ari-38120-20041118-1131-linux-ia32, Native Threads, GC strategy: parallel)
Gc Algorithm: JRockit Garbage Collection System currently running strategy: Single generational, parallel mark, parallel sweep
Number Of Processors: 4
Max Heap Size: 1073741824
Total Garbage Collection Time: 21:43:56.5
Uptime: 114:33:4.1
Total Garbage Collection Count: 420872
Total Number Of Threads: 198
Number Of Daemon Threads: 191
Can you guys please tell me what would be problem in the server which causing the high cpu usage?
One more thing I would like to know is that why the total number of threads is 198 when we specified the Executor pool size as 25? I agree that weblogic would create some threads for its maintenance but around 160 threads!!! something is wrong I guess.
Santhosh.
[email protected]

Hi,
I'm having a similar problem, but haven't been able to resolve it yet. Troubleshooting is made even harder by the fact that this is only happening on our production server, and I've been unable to reproduce it in the lab.
I'll post whatever findings I have and hopefully we'll be able to find a solution with the help of BEA engineers.
In my case, I have a stand-alone Tomcat server that runs fine for about 1-2 days, and then the JVM suddenly starts using more CPU, and as a result, the server load shoots up (normal CPU utilization is ~5% but eventually goes up to ~95%; load goes from 0.1 to 4+).
What I have found so far is that this corresponds to increased GC activity.
Let me list my environment specs before I proceed, though:
CPU: Dual Xeon 3.06GHz
RAM: 2GB
OS: RHEL4.4 (2.6.9-42.0.2.ELsmp)
JVM build 1.5.0_03-b07 (BEA JRockit(R) (build dra-45238-20050523-2008-linux-ia32, R25.2.0-28))
Tomcat version 5.5.12
JAVA_OPTS="-Xms768m -Xmx768m -XXtlasize16k -XXlargeobjectlimit16k -Xverbose:memory,cpuinfo -Xverboselog:/var/log/tomcat5/jvm.log -Xverbosetimestamp"
Here are excerpts from my verbose log (I'm getting some HT warning, not sure if that's a problem):
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Detected SMP with 2 CPUs that support HT.
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Trying to determine if HT is enabled.
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Trying to read from /dev/cpu/0/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Warning: Failed to read from /dev/cpu/0/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Trying to read from /dev/cpu/1/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Warning: Failed to read from /dev/cpu/1/cpuid
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] HT is: supported by the CPU, not enabled by the OS, enabled in JRockit.
[Fri Oct 20 15:54:18 2006][22855][cpuinfo] Warning: HT enabled even though OS does not seem to support it.
[Fri Oct 20 15:54:55 2006][22855][memory ] GC strategy: System optimized over throughput (initial strategy singleparpar)
[Fri Oct 20 15:54:55 2006][22855][memory ] heap size: 786432K, maximal heap size: 786432K
[Fri Oct 20 16:07:30 2006][22855][memory ] Changing GC strategy to generational, parallel mark and parallel sweep
[Fri Oct 20 16:07:30 2006][22855][memory ] 791.642-791.874: GC 786432K->266892K (786432K), 232.000 ms
[Fri Oct 20 16:08:02 2006][22855][memory ] 824.122: nursery GC 291998K->274164K (786432K), 175.873 ms
[Fri Oct 20 16:09:51 2006][22855][memory ] 932.526: nursery GC 299321K->281775K (786432K), 110.879 ms
[Fri Oct 20 16:10:24 2006][22855][memory ] 965.844: nursery GC 308151K->292222K (786432K), 174.609 ms
[Fri Oct 20 16:11:54 2006][22855][memory ] 1056.368: nursery GC 314718K->300068K (786432K), 66.032 ms
[Sat Oct 21 23:21:09 2006][22855][memory ] 113210.427: nursery GC 734274K->676137K (786432K), 188.985 ms
[Sat Oct 21 23:30:41 2006][22855][memory ] 113783.140: nursery GC 766601K->708592K (786432K), 96.007 ms
[Sat Oct 21 23:36:15 2006][22855][memory ] 114116.332-114116.576: GC 756832K->86835K (786432K), 243.333 ms
[Sat Oct 21 23:48:20 2006][22855][memory ] 114841.653: nursery GC 182299K->122396K (786432K), 175.252 ms
[Sat Oct 21 23:48:52 2006][22855][memory ] 114873.851: nursery GC 195060K->130483K (786432K), 142.122 ms
[Sun Oct 22 00:01:31 2006][22855][memory ] 115632.706: nursery GC 224096K->166618K (786432K), 327.264 ms
[Sun Oct 22 00:16:37 2006][22855][memory ] 116539.368: nursery GC 246564K->186328K (786432K), 173.888 ms
[Sun Oct 22 00:26:21 2006][22855][memory ] 117122.577: nursery GC 279056K->221543K (786432K), 170.367 ms
[Sun Oct 22 00:26:21 2006][22855][memory ] 117123.041: nursery GC 290439K->225833K (786432K), 69.170 ms
[Sun Oct 22 00:29:10 2006][22855][memory ] 117291.795: nursery GC 298947K->238083K (786432K), 207.200 ms
[Sun Oct 22 00:39:05 2006][22855][memory ] 117886.478: nursery GC 326956K->263441K (786432K), 87.009 ms
[Sun Oct 22 00:55:22 2006][22855][memory ] 118863.947: nursery GC 357229K->298971K (786432K), 246.643 ms
[Sun Oct 22 01:08:17 2006][22855][memory ] 119638.750: nursery GC 381744K->322332K (786432K), 147.996 ms
[Sun Oct 22 01:11:22 2006][22855][memory ] 119824.249: nursery GC 398678K->336478K (786432K), 93.046 ms
[Sun Oct 22 01:21:35 2006][22855][memory ] 120436.740: nursery GC 409150K->345186K (786432K), 81.304 ms
[Sun Oct 22 01:21:38 2006][22855][memory ] 120439.582: nursery GC 409986K->345832K (786432K), 153.534 ms
[Sun Oct 22 01:21:42 2006][22855][memory ] 120443.544: nursery GC 410632K->346473K (786432K), 121.371 ms
[Sun Oct 22 01:21:44 2006][22855][memory ] 120445.508: nursery GC 411273K->347591K (786432K), 60.688 ms
[Sun Oct 22 01:21:44 2006][22855][memory ] 120445.623: nursery GC 412391K->347785K (786432K), 68.935 ms
[Sun Oct 22 01:21:45 2006][22855][memory ] 120446.576: nursery GC 412585K->348897K (786432K), 152.333 ms
[Sun Oct 22 01:21:45 2006][22855][memory ] 120446.783: nursery GC 413697K->349080K (786432K), 70.456 ms
[Sun Oct 22 01:34:16 2006][22855][memory ] 121197.612: nursery GC 437378K->383392K (786432K), 165.771 ms
[Sun Oct 22 01:37:37 2006][22855][memory ] 121398.496: nursery GC 469709K->409076K (786432K), 78.257 ms
[Sun Oct 22 01:37:37 2006][22855][memory ] 121398.730: nursery GC 502490K->437713K (786432K), 65.747 ms
[Sun Oct 22 01:44:03 2006][22855][memory ] 121785.259: nursery GC 536605K->478156K (786432K), 132.293 ms
[Sun Oct 22 01:44:04 2006][22855][memory ] 121785.603: nursery GC 568408K->503635K (786432K), 71.751 ms
[Sun Oct 22 01:50:39 2006][22855][memory ] 122180.985: nursery GC 591332K->530811K (786432K), 131.831 ms
[Sun Oct 22 02:13:52 2006][22855][memory ] 123573.719: nursery GC 655566K->595257K (786432K), 117.311 ms
[Sun Oct 22 02:36:04 2006][22855][memory ] 124905.507: nursery GC 688896K->632129K (786432K), 346.990 ms
[Sun Oct 22 02:50:24 2006][22855][memory ] 125765.715-125765.904: GC 786032K->143954K (786432K), 189.000 ms
[Sun Oct 22 02:50:26 2006][22855][memory ] 125767.535-125767.761: GC 723232K->70948K (786432K), 225.000 ms
vvvvv
[Sun Oct 22 02:50:27 2006][22855][memory ] 125768.751-125768.817: GC 712032K->71390K (786432K), 64.919 ms
[Sun Oct 22 02:50:28 2006][22855][memory ] 125769.516-125769.698: GC 711632K->61175K (786432K), 182.000 ms
[Sun Oct 22 02:50:29 2006][22855][memory ] 125770.753-125770.880: GC 709632K->81558K (786432K), 126.000 ms
[Sun Oct 22 02:50:30 2006][22855][memory ] 125771.699-125771.878: GC 708432K->61368K (786432K), 179.000 ms
So, I'm running with the default GC strategy which lets the GC pick the most suitable approach (single space or generational). It seems to switch to generational almost immediately and runs well - most GC runs are in the nursery, and only once in a while it goes through the older space.
Now, if you look at [Sun Oct 22 02:50:27 2006], that's when everything changes. GC starts running every second (later on it's running 3 times a second) doing huge sweeps. It never goes through the nursery again, although the strategy is still generational.
It's all downhill from this point on, and it's a matter of hours (maybe a day) before we restart the server.
I guess my only question is: What would cause such GC behavior?
I would appreciate your ideas/comments!
Thanks,
Tenyo

Managing statistics for object collections used as table types in SQL

Hi All,
Is there a way to manage statistics for collections used as table types in SQL.
Below is my test case
Oracle Version :
SQL> select * from v$version;
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE    11.2.0.3.0      Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
SQL> Original Query :
SELECT
     9999,
     tbl_typ.FILE_ID,
     tf.FILE_NM ,
     tf.MIME_TYPE ,
     dbms_lob.getlength(tfd.FILE_DATA)
FROM
     TG_FILE tf,
     TG_FILE_DATA tfd,
          SELECT
          FROM
               TABLE
                    SELECT
                         CAST(TABLE_ESC_ATTACH(OBJ_ESC_ATTACH( 9999, 99991, 'file1.png', NULL, NULL, NULL),
                         OBJ_ESC_ATTACH( 9999, 99992, 'file2.png', NULL, NULL, NULL)) AS TABLE_ESC_ATTACH)
                    FROM
                         dual
     )     tbl_typ
WHERE
     tf.FILE_ID     = tfd.FILE_ID
AND tf.FILE_ID = tbl_typ.FILE_ID
AND tfd.FILE_ID = tbl_typ.FILE_ID;
Elapsed: 00:00:02.90
Execution Plan
Plan hash value: 3970072279
| Id | Operation                                | Name         | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                         |              |     1 |   194 | 4567   (2)| 00:00:55 |
|* 1 | HASH JOIN                               |              |     1 |   194 | 4567   (2)| 00:00:55 |
|* 2 |   HASH JOIN                              |              | 8168 |   287K|   695   (3)| 00:00:09 |
|   3 |    VIEW                                  |              | 8168 |   103K|    29   (0)| 00:00:01 |
|   4 |     COLLECTION ITERATOR CONSTRUCTOR FETCH|              | 8168 | 16336 |    29   (0)| 00:00:01 |
|   5 |      FAST DUAL                           |              |     1 |       |     2   (0)| 00:00:01 |
|   6 |    TABLE ACCESS FULL                     | TG_FILE      |   565K|    12M|   659   (2)| 00:00:08 |
|   7 |   TABLE ACCESS FULL                      | TG_FILE_DATA |   852K|   128M| 3863   (1)| 00:00:47 |
Predicate Information (identified by operation id):
   1 - access("TF"."FILE_ID"="TFD"."FILE_ID" AND "TFD"."FILE_ID"="TBL_TYP"."FILE_ID")
   2 - access("TF"."FILE_ID"="TBL_TYP"."FILE_ID")
Statistics
          7 recursive calls
          0 db block gets
      16783 consistent gets
      16779 physical reads
          0 redo size
        916 bytes sent via SQL*Net to client
        524 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
          2 rows processed Indexes are present in both the tables ( TG_FILE, TG_FILE_DATA ) on column FILE_ID.
select
     index_name,blevel,leaf_blocks,DISTINCT_KEYS,clustering_factor,num_rows,sample_size
from
     all_indexes
where table_name in ('TG_FILE','TG_FILE_DATA');
INDEX_NAME                     BLEVEL LEAF_BLOCKS DISTINCT_KEYS CLUSTERING_FACTOR     NUM_ROWS SAMPLE_SIZE
TG_FILE_PK                          2        2160        552842             21401       552842      285428
TG_FILE_DATA_PK                     2        3544        852297             61437       852297      852297 Ideally the view should have used NESTED LOOP, to use the indexes since the no. of rows coming from object collection is only 2.
But it is taking default as 8168, leading to HASH join between the tables..leading to FULL TABLE access.
So my question is, is there any way by which I can change the statistics while using collections in SQL ?
I can use hints to use indexes but planning to avoid it as of now. Currently the time shown in explain plan is not accurate
Modified query with hints :
SELECT
    /*+ index(tf TG_FILE_PK ) index(tfd TG_FILE_DATA_PK) */
    9999,
    tbl_typ.FILE_ID,
    tf.FILE_NM ,
    tf.MIME_TYPE ,
    dbms_lob.getlength(tfd.FILE_DATA)
FROM
    TG_FILE tf,
    TG_FILE_DATA tfd,
        SELECT
        FROM
            TABLE
                    SELECT
                         CAST(TABLE_ESC_ATTACH(OBJ_ESC_ATTACH( 9999, 99991, 'file1.png', NULL, NULL, NULL),
                         OBJ_ESC_ATTACH( 9999, 99992, 'file2.png', NULL, NULL, NULL)) AS TABLE_ESC_ATTACH)
                    FROM
                         dual
    tbl_typ
WHERE
    tf.FILE_ID     = tfd.FILE_ID
AND tf.FILE_ID = tbl_typ.FILE_ID
AND tfd.FILE_ID = tbl_typ.FILE_ID;
Elapsed: 00:00:00.01
Execution Plan
Plan hash value: 1670128954
| Id | Operation                                 | Name            | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                          |                 |     1 |   194 | 29978   (1)| 00:06:00 |
|   1 | NESTED LOOPS                             |                 |       |       |            |          |
|   2 |   NESTED LOOPS                            |                 |     1 |   194 | 29978   (1)| 00:06:00 |
|   3 |    NESTED LOOPS                           |                 | 8168 | 1363K| 16379   (1)| 00:03:17 |
|   4 |     VIEW                                  |                 | 8168 |   103K|    29   (0)| 00:00:01 |
|   5 |      COLLECTION ITERATOR CONSTRUCTOR FETCH|                 | 8168 | 16336 |    29   (0)| 00:00:01 |
|   6 |       FAST DUAL                           |                 |     1 |       |     2   (0)| 00:00:01 |
|   7 |     TABLE ACCESS BY INDEX ROWID           | TG_FILE_DATA    |     1 |   158 |     2   (0)| 00:00:01 |
|* 8 |      INDEX UNIQUE SCAN                    | TG_FILE_DATA_PK |     1 |       |     1   (0)| 00:00:01 |
|* 9 |    INDEX UNIQUE SCAN                      | TG_FILE_PK      |     1 |       |     1   (0)| 00:00:01 |
| 10 |   TABLE ACCESS BY INDEX ROWID             | TG_FILE         |     1 |    23 |     2   (0)| 00:00:01 |
Predicate Information (identified by operation id):
   8 - access("TFD"."FILE_ID"="TBL_TYP"."FILE_ID")
   9 - access("TF"."FILE_ID"="TBL_TYP"."FILE_ID")
       filter("TF"."FILE_ID"="TFD"."FILE_ID")
Statistics
          0 recursive calls
          0 db block gets
         16 consistent gets
          8 physical reads
          0 redo size
        916 bytes sent via SQL*Net to client
        524 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
          2 rows processed
Thanks,
B

Thanks Tubby,
While searching I had found out that we can use CARDINALITY hint to set statistics for TABLE funtion.
But I preferred not to say, as it is currently undocumented hint. I now think I should have mentioned it while posting for the first time
http://www.oracle-developer.net/display.php?id=427
If we go across the document, it has mentioned in total 3 hints to set statistics :
1) CARDINALITY (Undocumented)
2) OPT_ESTIMATE ( Undocumented )
3) DYNAMIC_SAMPLING ( Documented )
4) Extensible Optimiser
Tried it out with different hints and it is working as expected.
i.e. cardinality and opt_estimate are taking the default set value
But using dynamic_sampling hint provides the most correct estimate of the rows ( which is 2 in this particular case )
With CARDINALITY hint
SELECT
    /*+ cardinality( e, 5) */*
FROM
     TABLE
          SELECT
               CAST(TABLE_ESC_ATTACH(OBJ_ESC_ATTACH( 9999, 99991, 'file1.png', NULL, NULL, NULL),
               OBJ_ESC_ATTACH( 9999, 99992, 'file2.png', NULL, NULL, NULL)) AS TABLE_ESC_ATTACH)
          FROM
               dual
     ) e ;
Elapsed: 00:00:00.00
Execution Plan
Plan hash value: 1467416936
| Id | Operation                             | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                      |      |     5 |    10 |    29   (0)| 00:00:01 |
|   1 | COLLECTION ITERATOR CONSTRUCTOR FETCH|      |     5 |    10 |    29   (0)| 00:00:01 |
|   2 |   FAST DUAL                           |      |     1 |       |     2   (0)| 00:00:01 |
With OPT_ESTIMATE hint
SELECT
     /*+ opt_estimate(table, e, scale_rows=0.0006) */*
FROM
     TABLE
          SELECT
               CAST(TABLE_ESC_ATTACH(OBJ_ESC_ATTACH( 9999, 99991, 'file1.png', NULL, NULL, NULL),
               OBJ_ESC_ATTACH( 9999, 99992, 'file2.png', NULL, NULL, NULL)) AS TABLE_ESC_ATTACH)
          FROM
               dual
     ) e ;
Execution Plan
Plan hash value: 4043204977
| Id | Operation                              | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                       |      |     5 |   485 |    29   (0)| 00:00:01 |
|   1 | VIEW                                  |      |     5 |   485 |    29   (0)| 00:00:01 |
|   2 |   COLLECTION ITERATOR CONSTRUCTOR FETCH|      |     5 |    10 |    29   (0)| 00:00:01 |
|   3 |    FAST DUAL                           |      |     1 |       |     2   (0)| 00:00:01 |
With DYNAMIC_SAMPLING hint
SELECT
    /*+ dynamic_sampling( e, 5) */*
FROM
     TABLE
          SELECT
               CAST(TABLE_ESC_ATTACH(OBJ_ESC_ATTACH( 9999, 99991, 'file1.png', NULL, NULL, NULL),
               OBJ_ESC_ATTACH( 9999, 99992, 'file2.png', NULL, NULL, NULL)) AS TABLE_ESC_ATTACH)
          FROM
               dual
     ) e ;
Elapsed: 00:00:00.00
Execution Plan
Plan hash value: 1467416936
| Id | Operation                             | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                      |      |     2 |     4 |    11   (0)| 00:00:01 |
|   1 | COLLECTION ITERATOR CONSTRUCTOR FETCH|      |     2 |     4 |    11   (0)| 00:00:01 |
|   2 |   FAST DUAL                           |      |     1 |       |     2   (0)| 00:00:01 |
Note
   - dynamic sampling used for this statement (level=2)I will be testing the last option "Extensible Optimizer" and put my findings here .
I hope oracle in future releases, improve the statistics gathering for collections which can be used in DML and not just use the default block size.
By the way, are you aware why it uses the default block size ? Is it because it is the smallest granular unit which oracle provides ?
Regards,
B

How to store a file and refer it from another file using the Binary cache?

Hello,
I think it's a long shot but I thought I will give it a try.
I am creating an excel file from an xml String using the Web Dynpro Binary cache.
The problem is that when columns with numbers are involved an extra #agg column is being added by the excel "flattener" which is in charge of rendering the excel file from the xml String.
The only way to override this excel feature is to supply your own XSLT and reference it from the XML. Now, since I am not using an actual filesystem but the Web Dynpro Binary cache, is it possible to use this cache in order to store there the xslt and refer it later from an XML?
Roy

Hi,
Just found out this.. See if you can make use of it..
getPublicCachedWebResource(byte[] webResource, WDWebResourceType resourceType, WDScopeType scopeType, WDDeployableObjectPart deployableObjectpart, String key)
 returns a IWDCachedWebResource, which is saved directly to the WDDeployableObject directory.
you can make WDDeployableObject as your component and point the reference to the component folder.. Since you are specifying a scope type.. it shoukd be deleted after the scope defined...
Lemme know if this works..:)

Elligible for Garbage Collection

If an object is unreferenced, but it does not declare a finalize() method, then is this object elligible to be finalized and freed by Gc?
Regards
JS

Thanks for the prompt reply.
JVM Specification says an object can be garbage collected when it is unreferenced.Thus that mean that setting an object to null can not make it elligible since some other objects may still refer the object in question?
JS

When will the demo object be eleigible for garbage collection?

class Test {
     private Demo d;
     void start() {
     d = new Demo();
     this.takeDemo(d);
     void takeDemo(Demo demo) {
     demo = null;
     demo = new Demo();
     }

Hey flounder, I am myself confused about garbage collection and assertions (yesterday)... Anyway because of ur interest in answering my query, I'll give one more try... But, if it's wrong, Please help me out.
The Demo (not demo) object created at line 4 has one 'this' reference on the next line. And as soon as this reference is eleigible, I guess even Demo d will be eligible. Correct?

Need to reset my security question, don't remember the answer. Need for first time use on my ipad2

Need to reset security q/a, don't remember the answer. Need for App store first time purchase on ipad2.

Alternatives for Help Resetting Security Questions and Rescue Mail
     1. Apple ID- All about Apple ID security questions.
     2. Rescue email address and how to reset Apple ID security questions
     3. Apple ID- Contacting Apple for help with Apple ID account security.
     4. Fill out and submit this form. Select the topic, Account Security.
     5. Call Apple Customer Service: Contacting Apple for support in your
          country and ask to speak to Account Security.
Note: If you have already forgotten your security questions, then you cannot
         set up a rescue email address in order to reset them. You must set up
         the rescue email address beforehand.
How to Manage your Apple ID: Manage My Apple ID

Is this object available for garbage collection

public class MyClass {
public static void main(String args []){
new MyClass().myFunc();
//Because I don't assign this reference to a variable, is it available for collection at this point?
public void myFunc(){ }
Thanks ..... Jimmy

What do you mean "in most cases"? I assume you don't
mean that most methods in any java program should be
static, Of course not... please actually read the context of my post. "in most cases" where the code is similar to what the OP posted, a static method would probably be appropriate. In code where you are creating a new instance of a class for the sole purpose of calling a method and not retaining a reference to it, it should probably be a static method. Look at the OP's code:
public class MyClass {
public static void main(String args []){
new MyClass().myFunc();
public void myFunc(){
}Notice that the OP does not keep a reference to the object, simply calling a method and leaving it at that. I am saying that in this situation, it would probably be more appropriate to do the following:
public class MyClass {
public static void main(String args []){
MyClass().myFunc();
public static void myFunc(){
}I imagine that there are situations where the OP's original design may be useful, but in most situations, a static method is appropriate.
This isn't that complicated... I see no need to get into an argument over it. Please don't just attempt to make me look like a fool (I do a fine job of that on my own).

Query help needed for querybuilder to use with lcm cli

Hi,
I had set up several queries to run with the lcm cli in order to back up personal folders, inboxes, etc. to lcmbiar files to use as backups. I have seen a few posts that are similar, but I have a specific question/concern.
I just recently had to reference one of these back ups only to find it was incomplete. Does the query used by the lcm cli also only pull the first 1000 rows? Is there a way to change this limit somwhere?
Also, since when importing this lcmbiar file for something 'generic' like 'all personal folders', pulls in WAY too much stuff, is there a better way to limit this? I am open to suggestions, but it would almost be better if I could create individual lcmbiar output files on a per user basis. This way, when/if I need to restore someone's personal folder contents, for example, I could find them by username and import just that lcmbiar file, as opposed to all 3000 of our users. I am not quite sure how to accomplish this...
Currently, with my limited windows scripting knowledge, I have set up a bat script to run each morning, that creates a 'runtime' properties file from a template, such that the lcmbiar file gets named uniquely for that day and its content. Then I call the lcm_cli using the proper command. The query within the properties file is currently very straightforward - select * from CI_INFOOBJECTS WHERE SI_ANCESTOR = 18.
To do what I want to do...
1) I'd first need a current list of usernames in a text file, that could be read (?) in and parsed to single out each user (remember we are talking about 3000) - not sure the best way to get this.
2) Then instead of just updating the the lcmbiar file name with a unique name as I do currently, I would also update the query (which would be different altogether): SELECT * from CI_INFOOBJECTS where SI_OWNER = '<username>' AND SI_ANCESTOR = 18.
In theory, that would grab everything owned by that user in their personal folder - right? and write it to its own lcmbiar file to a location I specify.
I just think chunking something like this is more effective and BO has no built in back up capability that already does this. We are on BO 4.0 SP7 right now, move to 4.1 SP4 over the summer.
Any thoughts on this would be much appreciated.
thanks,
Missy

Just wanted to pass along that SAP Support pointed me to KBA 1969259 which had some good example queries in it (they were helping me with a concern I had over the lcmbiar file output, not with query design). I was able to tweak one of the sample queries in this KBA to give me more of what I was after...
SELECT TOP 10000 static, relationships, SI_PARENT_FOLDER_CUID, SI_OWNER, SI_PATH FROM CI_INFOOBJECTS,CI_APPOBJECTS,CI_SYSTEMOBJECTS WHERE (DESCENDENTS ("si_name='Folder Hierarchy'","si_name='<username>'"))
This exports inboxes, personal folders, categories, and roles, which is more than I was after, but still necessary to back up.. so in a way, it is actually better because I have one lcmbiar file per user - contains all their 'personal' objects.
So between narrowing down my set of users to only those who actually have saved things to their personal folder and now having a query that actually returns what I expect it to return, along with the help below for a job to clean up these excessive amounts of promotion jobs I am now creating... I am all set!
Hopefully this can help someone else too!
Thanks,
missy

Help needed for file processing using FTP

Hi All,
I am new to ODI tool and currently we are implementing one project in ODI. Could you please, any one help me on the following requirement... how to implement it?
Scenario:
i) I need to pick a file from remote host 'outbox' dir using FTP process, and place into local 'temp' dir. (I can do it with odiFTPGet tool)
ii) Change the file as per target business requirement.??? ( this step challenging me)
for ex:
if source file name : <project name>_<source ID>_<transaction name>_<unique id>.txt
target name should be : 1234_<transaction name>_<sysdate in yyyyMMddhhmmss>_<unique id>_2345.txt ( here 1234 and 2345 are hard coded values)
iii) Later move to local 'temp' to local 'outbox' dir. ( I can do it with odiFileMove tool)
iv) After successful process move the file from remote 'outbox' to remote 'archive' dir ??? (again this is challenging me).
For this my questions are:
1) How to get file name into a variable ( In one of the post , it says we need to create data model and data stores, and interface to get the file names into a file. apart from is there any easy way i can implement it in package it self?)
2) How to tokenize a long string ( i.e., need to tokenize the source file to get <unique id> and <transaction name> and map to target file name)
3) How to define implementation for Java in user function?? do we need to use class declarations and import statements?? I need a sample user function in Java.
4) How to move/rename a file in remote server?? ( need to move file from remote 'outbox' server to remote archive' dir)
5) If any step in package fails, How to get the error msg into a variable which i can use for sending mail and raise a ticket in remedy?? ( I will pass that variable to as content to mail and remedy ticket)
6) How to handle list type data (string list) by variables in ODI?? (As we can define single variable not as list.)
I am sorry to ask all my queries I a single post. But I need to solutions for all to implement this in my project.
Thanks in advance. Appreciate early response.
Regards,
Kiran.N

Can any one share your thoughts for my request.
Thanks in advance.
Regards,
Kiran

Urgent help needed for XML Tags using XMLForest()

Folks
I need some urgent help regarding getting use defined tag in your
XML output.
For this I am using XMLElement and XMLForest which seems to work fine
when used at the SQL prompt but when used in a procedure throws and error
SQL> Select SYS_XMLAGG(XMLElement("SDI",
 XMLForest(sdi_num)))
 From sdi
 where sdi_num = 22261;- WORKS FINE
But when used in a procedure,doesnt seem to work
Declare
 queryCtx DBMS_XMLQuery.ctxType;
 v_xml VARCHAR2(32767);
 v_xmlClob CLOB;
 BEGIN
 v_xml:='Select SYS_XMLAGG(XMLElement("SDI",
 XMLFOREST(sdi_num)))
 From sdi
 where sdi_num = 22261';
 queryCtx :=DBMS_XMLQuery.newContext(v_xml);
 v_xmlClob :=DBMS_XMLQuery.getXML(queryCtx);
 display_xml(v_xmlClob);
End;
CREATE OR REPLACE PROCEDURE display_xml(result IN OUT NOCOPY CLOB)
AS
 xmlstr varchar2(32767);
 line varchar2(2000);
BEGIN
 xmlstr:=dbms_lob.SUBSTR(result,32767);
 LOOP
 EXIT WHEN xmlstr is null;
 line :=substr(xmlstr,1,instr(xmlstr,chr(10))-1);
 dbms_output.put_line('.'||line);
 xmlstr := substr(xmlstr,instr(xmlstr,chr(10))+1);
 END LOOP;
end;
SQL> /
.<?xml version = '1.0'?>
.<ERROR>oracle.xml.sql.OracleXMLSQLException: Character ')' is not allowed in an
XML tag name.</ERROR>
PL/SQL procedure successfully completed.
SQL>HELP is appreciated as to where I am going wrong?

Hi,
if you want to transform something to something else, you should declare, what is your source.
I would prefer to use plain XSL-Transformations, because you have a lot more options to transform your source and you can even better determine, how your output should looks like.
Kind regards,
Hendrik

Need for garbage collection using Webdynpro Binary Cache?

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