How can I tune up WTK 2.5.2 performence except Preferences/Performance?

Hi
Is there a way to tune up WTK 2.5.2 performence? I've already checked the Preferences/Performance. I'm developing J2ME application which uses a lot of icons etc. generaly it works ok. However when it comes to the screens with icons, the emulator is very slow :(. How can i change that. Maybe add more RAM to the emulator or something. My app doesn't need to work on real device so optimalization and other concerns are out of the question.
Anybody knows the answer?
thx

Sorry, didn't see that part.
Anyway, in that case, you should profile your application to find out what part of your code is slow, and try to impove it

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How Can We Tune the Joins with "OR" Caluse ?

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We've identified one Query in one of Our PL/SQL Stored Procedure which is taking huge time to fetch the records. I have simulated the problem as shown below. The problem Is, How can i tune the Jions with "OR" Clause. i have tried replacing them with Exists Caluse, But the Performance was not much was expected.
CREATE TABLE TEST
(ID NUMBER VDATE DATE );
BEGIN
FOR i IN 1 .. 100000 LOOP
    INSERT INTO TEST
    VALUES
      (i, TO_DATE(TRUNC(DBMS_RANDOM.VALUE(2452641, 2452641 + 364)), 'J'));
    IF MOD(i, 1000) = 0 THEN
      COMMIT;
    END IF;
END LOOP;
END;
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INSERT INTO RTEST1
SELECT ID, TO_NUMBER(TO_CHAR(VDATE,'MM'))
FROM TEST ;
CREATE TABLE RTEST2 ( ID NUMBER, VMONTH NUMBER );
INSERT INTO RTEST2
SELECT ID, TO_NUMBER(TO_CHAR(VDATE,'MM'))
FROM TEST;
CREATE INDEX RTEST1_IDX2 ON RTEST1(VMONTH)
CREATE INDEX RTEST2_IDX1 ON RTEST2(VMONTH)
ALTER TABLE RTEST1 ADD CONSTRAINT RTEST1_PK PRIMARY KEY (ID)
ALTER TABLE RTEST2 ADD CONSTRAINT RTEST2_PK PRIMARY KEY (ID)
SELECT A.ID, B.VMONTH
FROM RTEST1 A , RTEST2 B
WHERE A.ID = B.ID
AND ( (A.ID = B.VMONTH) OR ( B.ID = A.VMONTH ) )
BEGIN
DBMS_STATS.gather_table_stats(ownname => 'PHASE30DEV',tabname => 'RTEST1');
DBMS_STATS.gather_table_stats(ownname => 'PHASE30DEV',tabname => 'RTEST2');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST1_IDX1');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST2_IDX2');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST1_IDX2');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST2_IDX1');
END; Pls suggest !!!!!!! How can I tune the Joins with "OR" Clause.
Regards
RJ

I don't like it, but you could use a hint:
SQL>r
1 SELECT A.ID, B.VMONTH
2 FROM RTEST1 A , RTEST2 B
3 WHERE A.ID = B.ID
4* AND ( (A.ID = B.VMONTH) OR ( B.ID = A.VMONTH ) )
Execution Plan
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=94 Card=2 Bytes=28)
   1    0   TABLE ACCESS (BY INDEX ROWID) OF 'RTEST2' (Cost=94 Card=1 Bytes=7)
   2    1     NESTED LOOPS (Cost=94 Card=2 Bytes=28)
   3    2       TABLE ACCESS (FULL) OF 'RTEST1' (Cost=20 Card=100000 Bytes=700000)
   4    2       BITMAP CONVERSION (TO ROWIDS)
   5    4         BITMAP AND
   6    5           BITMAP CONVERSION (FROM ROWIDS)
   7    6             INDEX (RANGE SCAN) OF 'RTEST2_PK' (UNIQUE)
   8    5           BITMAP OR
   9    8             BITMAP CONVERSION (FROM ROWIDS)
10    9               INDEX (RANGE SCAN) OF 'RTEST2_IDX1' (NON-UNIQUE)
11    8             BITMAP CONVERSION (FROM ROWIDS)
12   11               INDEX (RANGE SCAN) OF 'RTEST2_PK' (UNIQUE)
Statistics
          0 recursive calls
          0 db block gets
     300332 consistent gets
          0 physical reads
          0 redo size
        252 bytes sent via SQL*Net to client
        235 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
          2 rows processed
SQL>SELECT /*+ ordered use_hash(b) */ A.ID, B.VMONTH
2    FROM RTEST1 A, RTEST2 B
3   WHERE A.ID = B.ID AND(A.ID = B.VMONTH OR B.ID = A.VMONTH)
4 ;
Execution Plan
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=175 Card=2 Bytes=28)
   1    0   HASH JOIN (Cost=175 Card=2 Bytes=28)
   2    1     TABLE ACCESS (FULL) OF 'RTEST1' (Cost=20 Card=100000 Bytes=700000)
   3    1     TABLE ACCESS (FULL) OF 'RTEST2' (Cost=20 Card=100000 Bytes=700000)
Statistics
          9 recursive calls
          0 db block gets
        256 consistent gets
        156 physical reads
          0 redo size
        252 bytes sent via SQL*Net to client
        235 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
          2 rows processed

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How can i tune this query?

Removed the post because of a major logical flaw. Thanks to Boneist for his great idea.
Edited by: user10633418 on Nov 20, 2008 3:21 AM

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How can I tune up WTK 2.5.2 performence except Preferences/Performance?

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