QUERY EXECUTION START TIME
a session is executing a query.I want to know at what time the query has started execution.Its a long running query and not yet finished execution?
Thankx..
hi user,
try with this sql.
CREATE OR REPLACE VIEW time ("SCHEMA",
ora_user,
nt_user,
SID,
serial#,
machine,
status,
exec_time,
MIN,
logon_time,
lockwait,
TYPE,
program
AS
SELECT SUBSTR (schemaname, 1, 10) SCHEMA,
SUBSTR (username, 1, 10) ora_user, SUBSTR (osuser, 1, 10) nt_user,
SID, serial#, SUBSTR (machine, 1, 30) machine,
SUBSTR (status, 1, 10) status,
TO_CHAR (FLOOR (last_call_et / 3600), '990') time,
TO_CHAR (FLOOR (MOD (last_call_et, 3600) / 60), '990') MIN,logon_time,
lockwait, TYPE, program
FROM v_$session
WHERE username = ' '
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I have created 3 tables with one column only. As an example Table 1 below:
SQL> create table T1 ( x char(2000));
So 3 tables are created in this way i.e. T1,T2 and T3.
T1 = in the default database tablespace of 8k (11g v11.1.0.6.0 - Production) (O.S=Windows).
T2 = I created in a Tablespace with Blocksize 16k.
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In 4k block size example, Oracle has to read just 121 blocks and it's taking nearly the same time as it's taking to read 490 blocks???
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Best Regards,Hi Chris,
No I'm not using separate databases, it's 8k database with non-standard blocksizes of 16k and 4k.
Actually I wanted to test the Elapsed time of these 3 tables, so for that I tried to create the same size
tables.
And how I equalize these is like I have created one column table with char(2000).
555 MB is the figure I wanted to use for these 3 tables ( no special figure, just to make it bigger than the
RAM used for my db at the db startup to be sure of not retrieving the records from cache).
so row size with overhead is 2006 * 290,000 rows = 581740000(bytes) / 1024 = 568105KB / 1024 = 555MB.
Through this math calculation I thought It will be the total table size. So I Created the same no. of rows in 3 blocksizes.
If it's wrong then what a mes because I was calculating tables sizes in the same way from the last few months.
Can you please explain a little how you found out the tables sizes in different block sizes.Though I understood how you
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T16K=41639 BLOCKS=650MB
BT4K=293656 BLOCKS=1147MB
For me it's new to calculate the size of a table. Can you please tell me then how many rows I can create in each of
these 3 tables to make them equal in MB to test for elapsed time.
Then I'll again run my test and put the results here. Because If I've wrongly calculated table sizes then there is no need to talk about elapsed time. First I must equalize the table sizes properly.
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Is above SQL is correct to calculate the size or is it the correct alternative way to your method of calculating the size??
I created the same table again with everything same and the result is :
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64 more blocks are allocated this time so may be that's y it's showing total size of 655 instead of 650.
Thanks alot for your help.
Best Regards,
KAm
Edited by: kam555 on Nov 20, 2009 5:57 PM -
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hi all,
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How to get the query execution time
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I am new to oracle and I am trying to get the execution time of a query.I tried the command set timing on and executed the query.But,the time it gives me is including the display of results.In my case,I ran a query against 50 million records and it is taking around 5 hours to display all the results.I like to know,how much time it take just to execute the query?Please help.
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TEST@db102 SQL> set timing on
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TEST@db102 SQL> select * from foo;
332944 rows selected.
Elapsed: 00:00:29.04
Execution Plan
Plan hash value: 1245013993
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 274K| 46M| 1071 (5)| 00:00:13 |
| 1 | TABLE ACCESS FULL| FOO | 274K| 46M| 1071 (5)| 00:00:13 |
Note
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Statistics
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26570 consistent gets
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0 redo size
35834383 bytes sent via SQL*Net to client
244537 bytes received via SQL*Net from client
22198 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
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TEST@db102 SQL> -
New Field at Query execution time.
Dear All,
I need some help in Bex User Exit.
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I have created formula variable using Exit. But code is not working .
Can you please help in this.
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Regards.I am not sure if I got your question right but you can use virtual characteristics in the cube. You do not need to reload data and can assign the new characteristic in it's own dimension or include in any existing dimension. You will need to reactivate update rules though...
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Hello Oracle Guru,
I have one question , suppose I have create one table with more than 100 column
and i tacke every column datatype varchar2(4000).
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If i reduce varchar2 size 300 instend of 4000 in table defination,
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Identifying query execution time
Hello,
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RegardsOracle Documentation is your best friend.
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/dynviews_2113.htm#i1417057
ELAPSED_TIME --> Elapsed time (in microseconds) used by this cursor for parsing, executing, and fetching
Asif Momen
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