Using trace response time much faster than without tracing

Oracle 10.2.0.3 64bit for windows 2003
one very simple statement, "delete from taba where id=**"
when run it without tracing, took about 2 mins
when adding 10046 trace, the response time is less than 2 seconds
repeated this dozens times, all the same problem.
anyone has this problem before?
appreciate your input.

Do you have trigger for DELETE statement on this table ?yes, 4 of them behind it
Do you have some dependent object like materialized view using this table ?no
Is this a single instance database or RAC database ?single instance
Do you have concurrent DML running on this table when runnnig this tests ?no
below if the tkprof
TKPROF: Release 10.2.0.3.0 - Production on Thu Jan 6 12:31:57 2011
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Trace file: pacs_ora_5800.trc
Sort options: default
count    = number of times OCI procedure was executed
cpu      = cpu time in seconds executing
elapsed  = elapsed time in seconds executing
disk     = number of physical reads of buffers from disk
query    = number of buffers gotten for consistent read
current  = number of buffers gotten in current mode (usually for update)
rows     = number of rows processed by the fetch or execute call
error connecting to database using: rpt3/rpt3
ORA-12560: TNS:protocol adapter error
EXPLAIN PLAN option disabled.
delete TABLEAs
where
id=:"SYS_B_0"
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.01          0          3         13           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.01          0          3         13           1
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: ALL_ROWS
Parsing user id: 36 
Rows     Row Source Operation
      1  DELETE  TABLEAS (cr=4 pr=0 pw=0 time=706 us)
      1   INDEX UNIQUE SCAN PK_TABLEA_ID (cr=3 pr=0 pw=0 time=39 us)(object id 23307)
Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       1        0.00          0.00
  SQL*Net message from client                     1        3.60          3.60
INSERT INTO TMP_TABLEAS_TRIGGER
VALUES
(:B1 )
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          1          7           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          1          7           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 1)
SELECT DISTINCT ID
FROM
TMP_TABLEAS_TRIGGER
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        2      0.00       0.00          0          3          0           1
total        4      0.00       0.00          0          3          0           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 1)
Rows     Row Source Operation
      1  HASH UNIQUE (cr=3 pr=0 pw=0 time=158 us)
      1   TABLE ACCESS FULL TMP_TABLEAS_TRIGGER (cr=3 pr=0 pw=0 time=37 us)
UPDATE TABLEAS SET SUPERCEDES = 0
WHERE
ID IN (SELECT ID FROM TABLEAAA WHERE AAID IN(SELECT AAID FROM
  TABLEAAA WHERE ID=:B1 ) ) AND SUPERCEDES=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.12       0.11          0      50411          2           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.12       0.11          0      50411          2           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 1)
Rows     Row Source Operation
      0  UPDATE  TABLEAS (cr=50411 pr=0 pw=0 time=117980 us)
      1   NESTED LOOPS  (cr=50411 pr=0 pw=0 time=117906 us)
  16731    VIEW  VW_NSO_1 (cr=217 pr=0 pw=0 time=17208 us)
  16731     SORT UNIQUE (cr=217 pr=0 pw=0 time=17206 us)
  16731      TABLE ACCESS BY INDEX ROWID TABLEAAA (cr=217 pr=0 pw=0 time=33524 us)
  16733       NESTED LOOPS  (cr=71 pr=0 pw=0 time=58 us)
      1        INDEX RANGE SCAN PK_TABLEA_AA (cr=3 pr=0 pw=0 time=30 us)(object id 23313)
  16731        INDEX RANGE SCAN IDX_TABLEAAA_AA_ID (cr=68 pr=0 pw=0 time=44 us)(object id 23316)
      1    TABLE ACCESS BY INDEX ROWID TABLEAS (cr=50194 pr=0 pw=0 time=90408 us)
  16730     INDEX UNIQUE SCAN PK_TABLEA_ID (cr=33464 pr=0 pw=0 time=45248 us)(object id 23307)
UPDATE TABLEAS SET SUPERCEDEDBY = 0
WHERE
ID IN (SELECT ID FROM TABLEAAA WHERE AAID IN(SELECT AAID FROM
  TABLEAAA WHERE ID=:B1 ) ) AND SUPERCEDEDBY=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.10       0.11          0      50411          2           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.10       0.11          0      50411          2           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 1)
Rows     Row Source Operation
      0  UPDATE  TABLEAS (cr=50411 pr=0 pw=0 time=117770 us)
      1   NESTED LOOPS  (cr=50411 pr=0 pw=0 time=117660 us)
  16731    VIEW  VW_NSO_1 (cr=217 pr=0 pw=0 time=17251 us)
  16731     SORT UNIQUE (cr=217 pr=0 pw=0 time=17250 us)
  16731      TABLE ACCESS BY INDEX ROWID TABLEAAA (cr=217 pr=0 pw=0 time=33528 us)
  16733       NESTED LOOPS  (cr=71 pr=0 pw=0 time=63 us)
      1        INDEX RANGE SCAN PK_TABLEA_AA (cr=3 pr=0 pw=0 time=38 us)(object id 23313)
  16731        INDEX RANGE SCAN IDX_TABLEAAA_AA_ID (cr=68 pr=0 pw=0 time=53 us)(object id 23316)
      1    TABLE ACCESS BY INDEX ROWID TABLEAS (cr=50194 pr=0 pw=0 time=90462 us)
  16730     INDEX UNIQUE SCAN PK_TABLEA_ID (cr=33464 pr=0 pw=0 time=45175 us)(object id 23307)
DELETE FROM TABLEAAA
WHERE
ID = :B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          3         10           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          3         10           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 1)
Rows     Row Source Operation
      0  DELETE  TABLEAAA (cr=4 pr=0 pw=0 time=626 us)
      1   INDEX RANGE SCAN PK_TABLEA_AA (cr=3 pr=0 pw=0 time=39 us)(object id 23313)
INSERT INTO TMP_TABLEAAA_RECORDS (AAID, STATUS,TABLEAID)
VALUES
(:B3 , :B2 ,:B1 )
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          1          7           1
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          1          7           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
SELECT DISTINCT AAID, STATUS,TABLEAID
FROM
TMP_TABLEAAA_RECORDS
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        2      0.00       0.00          0          3          0           1
total        4      0.00       0.00          0          3          0           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
Rows     Row Source Operation
      1  HASH UNIQUE (cr=3 pr=0 pw=0 time=162 us)
      1   TABLE ACCESS FULL TMP_TABLEAAA_RECORDS (cr=3 pr=0 pw=0 time=35 us)
SELECT COUNT(*)
FROM
TABLEAAA WHERE AAID = :B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        1      0.01       0.00          0         68          0           1
total        3      0.01       0.00          0         68          0           1
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
Rows     Row Source Operation
      1  SORT AGGREGATE (cr=68 pr=0 pw=0 time=2936 us)
  16730   INDEX RANGE SCAN IDX_TABLEAAA_AA_ID (cr=68 pr=0 pw=0 time=8 us)(object id 23316)
UPDATE TABLEAS SET SUPERCEDES = 0
WHERE
ID IN (SELECT ID FROM TABLEAAA WHERE AAID IN(SELECT AAID FROM
  TABLEAAA WHERE AAID=:B2 ) ) AND SUPERCEDES=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.29       0.29          0     121996          0           0
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.29       0.29          0     121996          0           0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
Rows     Row Source Operation
      0  UPDATE  TABLEAS (cr=121996 pr=0 pw=0 time=295237 us)
      0   HASH JOIN SEMI (cr=121996 pr=0 pw=0 time=295234 us)
      0    TABLE ACCESS FULL TABLEAS (cr=121996 pr=0 pw=0 time=295131 us)
      0    VIEW  VW_NSO_1 (cr=0 pr=0 pw=0 time=0 us)
      0     MERGE JOIN CARTESIAN (cr=0 pr=0 pw=0 time=0 us)
      0      TABLE ACCESS FULL TABLEAAA (cr=0 pr=0 pw=0 time=0 us)
      0      BUFFER SORT (cr=0 pr=0 pw=0 time=0 us)
      0       INDEX RANGE SCAN IDX_TABLEAAA_AA_ID (cr=0 pr=0 pw=0 time=0 us)(object id 23316)
UPDATE TABLEAS SET SUPERCEDES = 0
WHERE
ID=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          3          0           0
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          3          0           0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
Rows     Row Source Operation
      0  UPDATE  TABLEAS (cr=3 pr=0 pw=0 time=33 us)
      0   INDEX UNIQUE SCAN PK_TABLEA_ID (cr=3 pr=0 pw=0 time=30 us)(object id 23307)
UPDATE TABLEAS SET SUPERCEDEDBY = 0
WHERE
ID IN (SELECT ID FROM TABLEAAA WHERE AAID IN(SELECT AAID FROM
  TABLEAAA WHERE AAID=:B2 ) ) AND SUPERCEDEDBY=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.26       0.29          0     121996          0           0
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.26       0.29          0     121996          0           0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
Rows     Row Source Operation
      0  UPDATE  TABLEAS (cr=121996 pr=0 pw=0 time=290701 us)
      0   HASH JOIN SEMI (cr=121996 pr=0 pw=0 time=290697 us)
      0    TABLE ACCESS FULL TABLEAS (cr=121996 pr=0 pw=0 time=290563 us)
      0    VIEW  VW_NSO_1 (cr=0 pr=0 pw=0 time=0 us)
      0     MERGE JOIN CARTESIAN (cr=0 pr=0 pw=0 time=0 us)
      0      TABLE ACCESS FULL TABLEAAA (cr=0 pr=0 pw=0 time=0 us)
      0      BUFFER SORT (cr=0 pr=0 pw=0 time=0 us)
      0       INDEX RANGE SCAN IDX_TABLEAAA_AA_ID (cr=0 pr=0 pw=0 time=0 us)(object id 23316)
UPDATE TABLEAS SET SUPERCEDEDBY = 0
WHERE
ID=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          3          0           0
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          3          0           0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
Rows     Row Source Operation
      0  UPDATE  TABLEAS (cr=3 pr=0 pw=0 time=42 us)
      0   INDEX UNIQUE SCAN PK_TABLEA_ID (cr=3 pr=0 pw=0 time=40 us)(object id 23307)
SELECT CLASSIFICATION
FROM
TABLEAS WHERE ID=:B1
call     count       cpu    elapsed       disk      query    current        rows
Parse        0      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        1      0.00       0.00          0          3          0           0
total        2      0.00       0.00          0          3          0           0
Misses in library cache during parse: 0
Optimizer mode: ALL_ROWS
Parsing user id: 36     (recursive depth: 2)
rollback
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          2         31           0
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          2         31           0
Misses in library cache during parse: 0
Parsing user id: 36 
Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  log file sync                                   1        0.00          0.00
  SQL*Net message to client                       1        0.00          0.00
  SQL*Net message from client                     1       14.18         14.18
alter session set events '10046 trace name context off'
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        0      0.00       0.00          0          0          0           0
total        2      0.00       0.00          0          0          0           0
Misses in library cache during parse: 0
Parsing user id: 36 
OVERALL TOTALS FOR ALL NON-RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse        3      0.00       0.00          0          0          0           0
Execute      3      0.00       0.01          0          5         44           1
Fetch        0      0.00       0.00          0          0          0           0
total        6      0.00       0.01          0          5         44           1
Misses in library cache during parse: 1
Misses in library cache during execute: 1
Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       3        0.00          0.00
  SQL*Net message from client                     3       14.18         24.44
  log file sync                                   1        0.00          0.00
OVERALL TOTALS FOR ALL RECURSIVE STATEMENTS
call     count       cpu    elapsed       disk      query    current        rows
Parse       12      0.00       0.00          0          0          0           0
Execute     13      0.79       0.82          0     344825         28           5
Fetch        6      0.01       0.00          0         77          0           3
total       31      0.81       0.82          0     344902         28           8
Misses in library cache during parse: 0
   16  user  SQL statements in session.
    0  internal SQL statements in session.
   16  SQL statements in session.
    0  statements EXPLAINed in this session.
Trace file: pacs_ora_5800.trc
Trace file compatibility: 10.01.00
Sort options: default
       1  session in tracefile.
      16  user  SQL statements in trace file.
       0  internal SQL statements in trace file.
      16  SQL statements in trace file.
      16  unique SQL statements in trace file.
    1066  lines in trace file.
      18  elapsed seconds in trace file.Edited by: OracleExplorer on Jan 21, 2011 8:40 PM

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    Garima

    user650817 wrote:
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    Randolf
    Oracle related stuff blog:
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    SQLTools++ for Oracle (Open source Oracle GUI for Windows):
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    http://sourceforge.net/projects/sqlt-pp/

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    Attachments:
    MultiTauAutocorrelate.vi ‏627 KB

    Hi,
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    Regards,
    Wiebe.
    "dakeddie" <[email protected]> wrote in message news:[email protected]...
    Hi,&nbsp; I wrote a labview routine to perform a multiple tau autocorrelation on a large array of integers.&nbsp; A multi tau autocorrelation is a way to reduce the computation time of the correlation but at the expense of resolution.&nbsp; You can taylor the multitau correlation to give you good resolution where you need it.&nbsp; For instance, I require good resolution near the middle (the peak) of the correlation, so I do a linear autocorrelation for the first 64 channels from the peak, then I skip every second channel for the next 32, then skip every 4th channel for 32 more, then skip every 8th for 32 channels... etc. Originally, I wrote my own multitau calculation, but it took several hours to perform for just 1024 channels of the correlation of around 2million points of data.&nbsp; I need to actually do the the correlation on probably 2 billion or more points of data, which would take days.&nbsp; So then I tried using labview's AutoCorrelation.vi which calls a library function.&nbsp; It could do a linear autocorrelation with 4 million points in less than a minute.&nbsp; I figured that writing my code in C and calling it using a call library function node would be faster, but that much faster?Finally, I wrote some code that extracts the correlation data points that I would've got from my multitau code from the linear correlation function that I get from the AutoCorrelation.vi.&nbsp; Clearly this is not optimal, since I spend time calculating all those channels of the correlation function just to throw them away in the end, but I need to do this because the final step of my procedure is to fit the correlation function to a theoretical one.&nbsp; With say 2million points, the fit would take too long.&nbsp; The interesting thing here is that simply extracting the 1024 point from the linear autocorrelation function takes a significant amount of time.&nbsp; Is labview really that slow?So, my questions are...&nbsp; if I rewrite my multitau autocorrelation function in C and call it using a call library function node, will it run that much faster?&nbsp; Can I achieve the same efficiency if I use a formula node structure?&nbsp; Why does it take so long just to extract 1024 points from an array?I've tried hiding indicators and this speeds things up a little bit, but not very much.I'll attach my code if you're interested in taking a look.&nbsp; There is a switch on the front panel called 'MultiTau'... if in the off position, the code performs the linear autocorrelation with the AutoCorrelation.vi, if in the on position, it performs a multitau autocorrelation using the code I wrote.&nbsp; Thanks for any help.
    MultiTauAutocorrelate.vi:
    http://forums.ni.com/attachments/ni/170/185730/1/M​ultiTauAutocorrelate.vi

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