How Does the Jsp Engine sense a changed jsp page

Hi All,
I would like to know how the jsp engine senses the change in .jsp page.Does it look thru the datetime stamp of the jsp page..
can somebody plz help me on this.
regards
Karthik

As long as the contents of the original JSP page remain unchanged, there is no need to generate a new servlet, since the Java code corresponding to those contents remains the same. For this reason, the very first step taken by the JSP page compiler when it receives a request for a JSP is to check the time stamp for the JSP file corresponding to the requested URL, to determine when that file was modified or created. The page compiler will also check the time stamp on the compiled servlet for this JSP page. If no compiled servlet is found, or if the time stamp on the JSP file is more recent than the one on the compiled page servlet, then a new servlet must be generated. This means that the (new or modified) JSP file must be parsed and translated into source code, and this new source code must be compiled. If the compiled servlet is newer than the JSP file, however, no new compilation is required and control can be transferred directly to the servlet to finish processing the request, saving considerable time. So while the first request for a new or recently modified JSP page will be slow, all later requests go straight to the compiled servlet for response generation.
regards
Vishnu

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UCCX 5/7 or 8 - Database access - How does the UCCX engine use the DB connection

I was asked the following question by a customer:
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"How does UCCX manage it’s database connections – a connection pool manager / single connection / single connection for each call"
Does anyone actually know ? Is it documented anywhere?
Based on how the steps work I'd guess that the UCCX engine makes a new single DB connection each time the DB step reaches out the DB for a read/write. I assume it would do this independently for every instance of a script running. Hence the importance of the DB release step I'm guessing.
I know in the DB subsystem you can configure the maximum number of DB connections to be used but this doesn't imply how they are used.
I'm not a DB guy, but I think the concern stems from the potential load on a DB server with the constant opening and closing of the DB connections. I'm assuming that if it used a connection pool the UCCX engine would open, and keep open, a group of DB connections to be used by the UCCX engine. This would lessen the load on the DB server I'm assuming.
Is there any fundamental difference with UCCX 8 and the DB access ? It obviously not ODBC anymore. It JDBC right ? But again how does the UCCX engine use the DB connection?

To my knowledge, this is not documented; however, at least through 7.0 the MIVR subsystem will open a pool of ODBC connections equal to the maximum you defined and keep them open. If you set it to 50, you will see 50 open connections on the SQL server. Each script that is triggered will attach to one of the available connections as soon as you use a DB-related step and keep it until you use a DB Release step. Once that script instance releases it, the connection is available for another script.
The behavior should not change with 8.0 as it is the same MIVR subsystem that is doing the work. My first CCX 8.0 project that needs database integration is still about 30 days away so I can't guarantee that though.

How Does the scheduler works with ODI engine

Hi All,
I am new to the ODI and I was going through the documents over the web regarding the scheduling.
Can anyone please let me know how does the Scheduler in ODI is coupled with the ODI engine.
How does the internal scheduler works and how does the external one works. What are the processes the it calls while invoking the scheduler.
Your help will be highly appreciated.
Thanks,
Sumit

Scheduling in ODI is controlled by a special type of ODI agent, strangley called the ODI scheduling agent. This agent is installed as a service and as well as being responsible for all tasks associated with a normal agent is also responsible for managing ODI jobs based on any scheduling information associated with an ODI scenario. All scheduling information is stored in the ODI repository and the scheduler agent reads from this to determine which jobs/scenarios need to be executed and when.

How does the event structure work & ...

How does the event structure work & and how to modify the case example if you want to change the name of the case? I haven't a look at the manual but nothing about event structure is mentioned.

I know how it works.. =P

How does this make any sense??

My husband gets the three bureao FICO subscription....this is on his credit report under "negative factors" HOW does this make ANY sense?!? It has "too many credit accounts with balances" as a negative factor...he has one credit card.... You have too many credit accounts with balances.EquifaxThe FICO® Score considers the number of accounts on a credit report showing a balance.Generally speaking, carrying fewer accounts with balances is considered less risky.For credit cards , your credit report may still show a balance on those cards - even if they are paid off in full each month. The total balance on the last statement is generally the amount that is shown on a credit report. NUMBER OF YOUR ACCOUNTS CARRYING A BALANCE Equifax1 accountFICO High Achievers have an average of 3 credit accounts carrying a balance.

I think they're trying to say that he doesn't have enough accounts and with only one reporting (with a balance of course), that's their common answer.

How does the iPod organize content?

When I manually add content to my video iPod, how does the iPod know where to put it? Does it go into Movies, Music, TV shows, podcasts, etc? Does it rely on the mp3 id tags??? If yes, can I force a movie to go into the music folder my simply changing mp3 id3 tags?
30G video ipod Windows XP Pro

1 I by its tag
2 depends on the files tag
3 No...mp4 and m4a files have diffrent tags then mp3s
In iTunes 6.0.5 if you change the "VIdeo Kind" it will sort correctly. Just right click file, and in the options tab change the setting under "VIdeo Kind".
Besides iTunes if you want to change a tag you have to use a mp4/m4a tag editor program like "YAMB ver 2 preview" it can change your tags and much more and its free http://yamb.unite-video.com/
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How does the CBO calculate the selectivity for range predicates on ROWID ?

Hi all,
I'm wondering how the CBO estimate the selectivity for range predicates based on ROWID columns.
For example, for the following query the CBO estimates there's going to be 35004 rows returned instead of 7:
SQL> SELECT count(*)
FROM intsfi i
WHERE
ROWID>='AAADxyAAWAAHDLIAAB' AND ROWID<='AAADxyAAWAAHDLIAAH'; 2    3    4
COUNT(*)
         7
Elapsed: 00:00:02.31
SQL> select * from table(dbms_xplan.display_cursor(null,null,'iostats last'));
PLAN_TABLE_OUTPUT
SQL_ID aqbdu2p2t6w0z, child number 1
SELECT count(*)   FROM intsfi i WHERE ROWID>='AAADxyAAWAAHDLIAAB' AND
ROWID<='AAADxyAAWAAHDLIAAH'
Plan hash value: 1610739540
| Id | Operation             | Name    | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
|   0 | SELECT STATEMENT      |         |      1 |        |      1 |00:00:02.31 |   68351 |
|   1 | SORT AGGREGATE       |         |      1 |      1 |      1 |00:00:02.31 |   68351 |
|* 2 |   INDEX FAST FULL SCAN| INTSFI2 |      1 | 35004 |      7 |00:00:02.31 |   68351 |
Predicate Information (identified by operation id):
   2 - filter((ROWID>='AAADxyAAWAAHDLIAAB' AND ROWID<='AAADxyAAWAAHDLIAAH'))According to Jonathan Lewis' book, for a normal column the selectivity would have been:
(value_column1-value_column2)/(high_value-low_value)+1/num_distinct+1/num_distinct
But here with the ROWID column, how does the CBO make its computation ?
SINGLE TABLE ACCESS PATH
Single Table Cardinality Estimation for INTSFI[I]
Table: INTSFI Alias: I
    Card: Original: 14001681.000000 Rounded: 35004 Computed: 35004.20 Non Adjusted: 35004.20

Hi Jonathan,
Some Clarifications
=============
DELETE /*+ ROWID(I) */ FROM INTSFI I WHERE
(I.DAVAL<=TO_DATE('12032008','DDMMYYYY') AND (EXISTS(SELECT 1 FROM
INTSFI S WHERE S.COINT=I.COINT AND S.NUCPT=I.NUCPT AND S.CTSIT=I.CTSIT
AND NVL(S.RGCID,-1)=NVL(I.RGCID,-1) AND S.CODEV=I.CODEV AND
S.COMAR=I.COMAR AND S.DAVAL>I.DAVAL) AND I.COMAR IN (SELECT P.COMAR
FROM PURMAR P WHERE P.NUPUR=1))) AND ROWID>='AAADxyAAWAAHDLIAAB' AND
ROWID<='AAADxyAAWAAHDLIAAH'
Plan hash value: 1677274993
| Id | Operation                      | Name    | Starts | E-Rows | A-Rows |   A-Time   | Buffers | OMem | 1Mem | Used-Mem |
|   0 | DELETE STATEMENT               |         |      1 |        |      0 |00:00:05.94 |   53247 |    |          |          |
|   1 | DELETE                        | INTSFI |      1 |        |      0 |00:00:05.94 |   53247 |    |          |          |
|* 2 |   HASH JOIN SEMI               |         |      1 |   9226 |      7 |00:00:05.94 |   53180 |   783K|   783K| 471K (0)|
|   3 |    NESTED LOOPS                |         |      1 |   9226 |      7 |00:00:00.01 |      10 |    |          |          |
|* 4 |     TABLE ACCESS BY ROWID RANGE| INTSFI |      1 |   9226 |      7 |00:00:00.01 |       6 |    |          |          |
|* 5 |     INDEX UNIQUE SCAN          | PURMAR1 |      7 |      1 |      7 |00:00:00.01 |       4 |    |          |          |
|   6 |    INDEX FAST FULL SCAN        | INTSFI1 |      1 |     14M|   7543K|00:00:01.73 |   53170 |    |          |          |
Predicate Information (identified by operation id):
   2 - access("S"."COINT"="I"."COINT" AND "S"."NUCPT"="I"."NUCPT" AND "S"."CTSIT"="I"."CTSIT" AND
              NVL("S"."RGCID",(-1))=NVL("I"."RGCID",(-1)) AND "S"."CODEV"="I"."CODEV" AND "S"."COMAR"="I"."COMAR")
       filter("S"."DAVAL">"I"."DAVAL")
   4 - access(ROWID>='AAADxyAAWAAHDLIAAB' AND ROWID<='AAADxyAAWAAHDLIAAH')
       filter("I"."DAVAL"<=TO_DATE(' 2008-03-12 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
   5 - access("P"."NUPUR"=1 AND "I"."COMAR"="P"."COMAR")
When I force the NESTED LOOP SEMI JOIN the query runs faster:
DELETE /*+ ROWID(I) */ FROM INTSFI I WHERE
(I.DAVAL<=TO_DATE('12032008','DDMMYYYY') AND (EXISTS(SELECT /*+ NL_SJ
*/ 1 FROM INTSFI S WHERE S.COINT=I.COINT AND S.NUCPT=I.NUCPT AND
S.CTSIT=I.CTSIT AND NVL(S.RGCID,-1)=NVL(I.RGCID,-1) AND S.CODEV=I.CODEV
AND S.COMAR=I.COMAR AND S.DAVAL>I.DAVAL) AND I.COMAR IN (SELECT P.COMAR
FROM PURMAR P WHERE P.NUPUR=1))) AND ROWID>='AAADxyAAWAAHDLIAAB' AND
ROWID<='AAADxyAAWAAHDLIAAH'
Plan hash value: 2031485112
| Id | Operation                      | Name    | Starts | E-Rows | A-Rows |   A-Time   | Buffers |
|   0 | DELETE STATEMENT               |         |      1 |        |      0 |00:00:00.01 |      94 |
|   1 | DELETE                        | INTSFI |      1 |        |      0 |00:00:00.01 |      94 |
|   2 |   NESTED LOOPS SEMI            |         |      1 |   9226 |      7 |00:00:00.01 |      27 |
|   3 |    NESTED LOOPS                |         |      1 |   9226 |      7 |00:00:00.01 |       9 |
|* 4 |     TABLE ACCESS BY ROWID RANGE| INTSFI |      1 |   9226 |      7 |00:00:00.01 |       5 |
|* 5 |     INDEX UNIQUE SCAN          | PURMAR1 |      7 |      1 |      7 |00:00:00.01 |       4 |
|* 6 |    INDEX RANGE SCAN            | INTSFI1 |      7 |     14M|      7 |00:00:00.01 |      18 |
Predicate Information (identified by operation id):
   4 - access(ROWID>='AAADxyAAWAAHDLIAAB' AND ROWID<='AAADxyAAWAAHDLIAAH')
       filter("I"."DAVAL"<=TO_DATE(' 2008-03-12 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))
   5 - access("P"."NUPUR"=1 AND "I"."COMAR"="P"."COMAR")
   6 - access("S"."COINT"="I"."COINT" AND "S"."NUCPT"="I"."NUCPT" AND
              "S"."CTSIT"="I"."CTSIT" AND "S"."CODEV"="I"."CODEV" AND "S"."COMAR"="I"."COMAR" AND
              "S"."DAVAL">"I"."DAVAL")
       filter(NVL("S"."RGCID",(-1))=NVL("I"."RGCID",(-1)))the above post is from Ahmed AANGOUR
Case 1 - . If you check Plan hash value: 16772749938
=====
TABLE ACCESS BY ROWID RANGE| INTSFI For every row access from INTSFI - it fetches a record from INDEX UNIQUE SCAN | PURMAR1
If we check A-rows = 9226
9226 * 7 = 64582 request across the table - perhaps with hint of rowid it fetches exact rows from PURMAR1
in this case i think going for hash join with ordered hints (jonathan as you suggest go for leading hint's instead of ordered) - from INTSFI - PURMAR1 - instead of going for IN clause would get the rows that satifies the ("P"."NUPUR"=1 AND "I"."COMAR"="P"."COMAR")
|* 2 |   HASH JOIN SEMI               |         |      1 |   9226 |      7 |00:00:05.94 |   53180 |   783K|   783K| 471K (0)|
|   3 |    NESTED LOOPS                |         |      1 |   9226 |      7 |00:00:00.01 |      10 |    |          |          |
|* 4 |     TABLE ACCESS BY ROWID RANGE| INTSFI |      1 |   9226 |      7 |00:00:00.01 |       6 |    |          |          |
|* 5 |     INDEX UNIQUE SCAN          | PURMAR1 |      7 |      1 |      7 |00:00:00.01 |       4 |    |          |          |My understanding with above plan would change to
HASH JOIN
TABLE ACCESS BY ROWID RANGE| INTSFI
INDEX UNIQUE SCAN | PURMAR1
HASH JOIN
INDEX FAST FULL SCAN | INTSFI1
Which migt be feasible.
2 .
DELETE /*+ ROWID(I) */ FROM INTSFI I WHERE
(I.DAVAL<=TO_DATE('12032008','DDMMYYYY') AND (EXISTS(SELECT /*+ NL_SJ
*/ 1 FROM INTSFI S WHERE S.COINT=I.COINT AND S.NUCPT=I.NUCPT AND
S.CTSIT=I.CTSIT AND NVL(S.RGCID,-1)=NVL(I.RGCID,-1) AND S.CODEV=I.CODEV
AND S.COMAR=I.COMAR AND S.DAVAL>I.DAVAL) AND I.COMAR IN (SELECT P.COMAR
FROM PURMAR P WHERE P.NUPUR=1))) AND ROWID>='AAADxyAAWAAHDLIAAB' AND
ROWID<='AAADxyAAWAAHDLIAAH'Ahmed AANGOUR, modified the query by /*+ NL_SJ */ hint, Instead of that in to remove the most of the rows as we join the tables using subquery, I still doubt it
to go push_predicate hints - still doubt it.
Jonathan your comments are most valuable in the above two cases..
Looking forward to calrify my understanding with concepts of indexes for above test cases
- Pavan Kumar N

How does the field CCSOFTLOCK in T000 Table get Updated ?

Hello Experts !
I would like to know how does the field CCSOFTLOCK in Table T000 Get updated ?
I tried all fields in SCC4 for a client but none of my change updates CCSOFTLOCK .
The Data Element Description says   Client control: Soft Lock Required (Planned for 4.0)
What does this Planned for 4.0 Indicate. We are in ECC5.0.System.
Regards,
Mithun Shetty

Hi Mithun,
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How does the Oracle DBMS locate the Oratab file?

I'm new to the Oracle environment. I have also successfully installed Oracle 11g on a Red Hat Enterprise Linux 5.3 platform. How does the DBMS locate the oratab file? My oratab is located under the "/etc" sub-directory. How does the DBMS know to look their? If I wanted to change the location of my "oratab" file how do I point the DBMS to the new location?
Thanks

The RDBMs does not care of the oratab file. (why should it?)
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hth,
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How does the search functon/input box work?

How does the search functon/input box work?
Hi
my level is beginner
there is a search box on the upper right hand on this page
frames in gey ?
how does this work.
does this search in the database?
if i would want to create this in an application
what can i do ?
are there CF examples??

Thanks
search against a database : Are there a function of Cf ta
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How does the sync process work?

Hello all,
I want to know what will happen if both the local and network homes have been modified for a period of two weeks and then the user chooses to synch? Will the sync process ask which 'home' is the most recent or will it replace older files with newer files?
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How does the follwoing query work?

Want to know how does the follwoign query work??
For every row in flsp
the subquery is going to get executed or is it just one time execution of the subquery??
UPDATE flsp
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Edited by: user8731258 on Sep 27, 2010 2:54 AM

user8731258 wrote:
the global session table is going to hold data for one sessions where as the table flsp is going to hold data for the entire day.During a session there could be say 10 thousand records.Sounds like a bad idea.
user8731258 wrote:
ANd there are goign to aroung 100 such sessions.Continues to sound bad.
user8731258 wrote:
I have to update the flsp continually.Just got worse.
user8731258 wrote:
How do i make this fetch fast??This still makes no sense to me.
Why are you moving all this data around and utilizing temporary tables instead of directly querying the underlying data on an 'as needed' basis?
I think you have undertaken entirely the wrong technical approach to whatever business problem you are attempting to solve (though it's hard to say for sure as we still know little of what you've got going on).
So back to step number one like i asked before.
Can you explain (from the very beginning) WHY you are attempting this type of set up?

How does the system Validyne pressure transducer -- Validyne CD280-Dual-- SCB-68-- PCI-6024E-- LABVIEW work and how can we calibrate the pressure transducer?

Hello there,
I am completely new to the LABVIEW software.
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Thanks,
Solved!
Go to Solution.
Attachments:
Experiment.vi ‏143 KB
Plogger.vi ‏21 KB

Hello there,
I do not understand what subVIs you are refering to but I have tried to run the LABVIEW program using the files I attached and it worked fine (pls see the attached pressure plot).
As I mentined before, I am new to LABVIEW so maybe I do not know.
Thanks,
Attachments:
Pressure plot.jpg ‏111 KB

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Try this.
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