Performance with Apex 3.2.1

Hello All,
I am using oracle apex 3.2.1 oracle 10g.
We are Using interactive reports using collections that involves maximum 5 tables with outer joins. when the total number of records are huge - the report is taking more time ie almost 30 minutes that shows 20,000 odd records .
and we are using EGY extended gate way .
Can any one suggest any methods to improve the performance ?
I got few questions need clarification.
1)How the apex works in retrieval of records from DB while displaying the records.
2)Will the performance improves if we use temporary tables instead of collections.
3) What are the different mechanisms we can use in apex to improve the performance in data retrieval .
Thanks/kumar
=========

PLEASE DO NOT POST A NEW POSTING THAT DEALS WITH AN OPEN QUESTION YOU HAVE POSTED. This is VERY annoying and wasteful of the forum users time. If you need, you can ADD this to your existing posting...
Thank you,
Tony Miller
Webster, TX

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Hi John,
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Performance issues ..with apex in reports version 3.1

Hello All,
I am using apex 3.1 oracle 10g.
I am facing with performance issues with apex . I am generating iteractive reports with apex and the number of records are huge - running in 30 to 40 thousands of records and the reports is taking almost 30 minutes.
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Edited by: kumar73 on Jun 18, 2010 10:21 AM

Hello Tony ,
The following are the sequence of steps to run the test case.
Note:- All the schemas , tables and variables are populated from database.
From Schema and Relations tab choose the following:
1)     Select P3I2008Q4 as schema.
2)     Choose Relation as query path.
3)     Select ECLA, ECLB, MTAB as relations.
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5)     Choose the variables AGE_SEXB, ALCNO, CLODESCB from ECLB relation.
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HI,
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Hi Rob,
Yes, I am crazy.Why would that be? ;)
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When trying to log in, I get the login page, but it tries to reference files such as apex_get_3_1.js while I only have files such as htmldb_get.js in my images directory in production. I noticed it is looking for what appears to be 3.1 files instead of 3.0 files... which concerns me.This indicates that your APEX would actually be a 3.1 and you should update you images directory.
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SELECT comp_name, version, status
FROM dba_registry
WHERE comp_id = 'APEX';-Udo

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Hello All,
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The problem description is as follows:
I have a huge number of objects, lets say 10,000 , and need to store the objects in such a collection so that if i want to store an object at some particular index i , I get the best performance.
I suppose as I need indexed based access, using List makes the best sense as Lists are ordered.
Using LinkedList over ArrayList gives the better performance in the aforementioned context.
Is there are way I can further improve the performance of LinkedList while solving this particular problem
OR
Is there any other index based collection using that i get better performance than LinkedList?
Thanks in advance

The trouble with a LinkedList as implemented in the Java libraries is that if you want to insert at index 100, it has no option but to step through the first 100 links of the list to find the insert point. Likewise is you retrieve by index. The strength of the linked list approach is lost if you work by index and the List interface gives no other way to insert in the middle of the list. The natural interface for a linked list would include an extended Iterator with methods for insert and replace. Of course LinkedLists are fine when you insert first or last.
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Performance with dates in the where clause

Performance with dates in the where clause
CREATE TABLE TEST_DATA
FNUMBER NUMBER,
FSTRING VARCHAR2(4000 BYTE),
FDATE DATE
create index t_indx on test_data(fdata);
query 1: select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
query 2: select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
query 3: select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_date('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
My questions:
1) Why isn't the index t_indx used in Execution plan 1?
2) From the execution plan, I see that query 2 & 3 is better than query 1. I do not see any difference between execution plan 2 & 3. Which one is better?
3) I read somewhere - "Always check the Access Predicates and Filter Predicates of Explain Plan carefully to determine which columns are contributing to a Range Scan and which columns are merely filtering the returned rows. Be sceptical if the same clause is shown in both."
Is that true for Execution plan 2 & 3?
3) Could some one explain what the filter & access predicate mean here?
Thanks in advance.
Execution Plan 1:
SQL> select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
COUNT(*)
283
Execution Plan
Plan hash value: 1486387033
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 517 (20)| 00:00:07 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | TABLE ACCESS FULL| TEST_DATA | 341 | 3069 | 517 (20)| 00:00:07 |
Predicate Information (identified by operation id):
2 - filter(TRUNC(INTERNAL_FUNCTION("FDATE"))=TRUNC(SYSDATE@!))
Note
- dynamic sampling used for this statement
Statistics
4 recursive calls
0 db block gets
1610 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
Execution Plan 2:
SQL> select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
COUNT(*)
283
Execution Plan
Plan hash value: 1687886199
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | FILTER | | | | | |
|* 3 | INDEX RANGE SCAN| T_INDX | 283 | 2547 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter(TRUNC(SYSDATE@!)<=TRUNC(SYSDATE@!)+.9999884259259259259259
259259259259259259)
3 - access("FDATE">=TRUNC(SYSDATE@!) AND
"FDATE"<=TRUNC(SYSDATE@!)+.999988425925925925925925925925925925925
9)
Note
- dynamic sampling used for this statement
Statistics
7 recursive calls
0 db block gets
76 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows
Execution Plan 3:
SQL> select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_dat
e('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
COUNT(*)
283
Execution Plan
Plan hash value: 1687886199
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | FILTER | | | | | |
|* 3 | INDEX RANGE SCAN| T_INDX | 283 | 2547 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter(TO_DATE('21-APR-10','dd-MON-yy')<=TO_DATE('21-APR-10
23:59:59','DD-MON-YY hh24:mi:ss'))
3 - access("FDATE">=TO_DATE('21-APR-10','dd-MON-yy') AND
"FDATE"<=TO_DATE('21-APR-10 23:59:59','DD-MON-YY hh24:mi:ss'))
Note
- dynamic sampling used for this statement
Statistics
7 recursive calls
0 db block gets
76 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed

Hi,
user10541890 wrote:
Performance with dates in the where clause
CREATE TABLE TEST_DATA
FNUMBER NUMBER,
FSTRING VARCHAR2(4000 BYTE),
FDATE DATE
create index t_indx on test_data(fdata);Did you mean fdat<b>e</b> (ending in e)?
Be careful; post the code you're actually running.
query 1: select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
query 2: select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
query 3: select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_date('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
My questions:
1) Why isn't the index t_indx used in Execution plan 1?To use an index, the indexed column must stand alone as one of the operands. If you had a function-based index on TRUNC (fdate), then it might be used in Query 1, because the left operand of = is TRUNC (fdate).
2) From the execution plan, I see that query 2 & 3 is better than query 1. I do not see any difference between execution plan 2 & 3. Which one is better?That depends on what you mean by "better".
If "better" means faster, you've already shown that one is about as good as the other.
Queries 2 and 3 are doing different things. Assuming the table stays the same, Query 2 may give different results every day, but the results of Query 3 will never change.
For clarity, I prefer:
WHERE fdate >= TRUNC (SYSDATE)
AND fdate < TRUNC (SYSDATE) + 1(or replace SYSDATE with a TO_DATE expression, depending on the requirements).
3) I read somewhere - "Always check the Access Predicates and Filter Predicates of Explain Plan carefully to determine which columns are contributing to a Range Scan and which columns are merely filtering the returned rows. Be sceptical if the same clause is shown in both."
Is that true for Execution plan 2 & 3?
3) Could some one explain what the filter & access predicate mean here?Sorry, I can't.

Generate pdf with apex listener 2.0

hi,
we would like to generate pdf out of apex.
as long as we have text (IRR) WITHOUT special characters (öäü), everything is working fine.
when we have this characters in a text-columng (IRR), then we get a .pdf with the following content:
javax.xml.transform.TransformerException: com.sun.org.apache.xml.internal.utils.WrappedRuntimeException: An invalid XML character (Unicode: 0x3) was found in the element content of the document.
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- we are working with apex-listener 2.0 (integrated in weblogic-server)
- we work with APEX 4.2.1.00.08
thanks for any ideas
roland
Edited by: user514151 on 01.04.2013 23:24

I have this same problem with windows-1250 encoding.
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     at oracle.dbtools.apex.hooks.ProcessorRegistry.postProcess(ProcessorRegistry.java:56)
     at oracle.dbtools.apex.ModApex.handleRequest(ModApex.java:241)
     at oracle.dbtools.apex.ModApex.doGet(ModApex.java:98)
     at oracle.dbtools.apex.ModApex.service(ModApex.java:316)
     at oracle.dbtools.rt.web.HttpEndpointBase.modApex(HttpEndpointBase.java:260)
     at oracle.dbtools.rt.web.HttpEndpointBase.service(HttpEndpointBase.java:110)
Any solution ?
Regards
md

Can i partition my HD now for fcpx since i didn't do it when i downloaded it. my performance with fcpx is terrible terrible performance

When i downloaded FCPX i was told I really didn't need to partition my hard drive. But my performance with fcpx is terrible from rendering constantly to waiting for a minute after you click for it to do it. I turn off the rendring, I transcoded the media to pro res went to file and hit transcode. but still i mean it crashes, buggy, suggy and it takes hours to do anything. I have my media on a external drive but i did screw up and put some media on internal drive. iMac OSX 10.7.2 3.06 GHZ Core 2 Duo. EX HD LaCie on a 800 firewire.

Partitioning the internal drive is - imho! - completely useless for UNIX-systems such as MacOS, due to excessive usage of (hidden!) temp-files.
And, especially a too small int. HDD partition for the system will brake any app 'til a full halt.
plus, 10.7. has some issues with managing Timemachine backups when it comes to large files as video - again, if the intHDD/OS drive is too small, it gets iffy.
at last >30GBs free, only codecs and material as intended by Cupertino = no probs here (on a much smaller/older set-up).

Performance with Apex 3.2.1

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