Long time reorganization table

Question

Hi Support
I tried to run the table reorganization of 128 GB, this run takes 15 hours.
Brtools run this reorganization, the options used were:
- brtools
- (3)
- (1)
- BRSPACE options for reorganization of tables
1 - BRSPACE profile (profile) ...... [initRQ1.sap]
2 - Database user/password (user) .. [/]
3 ~ Reorganization action (action) . []
4 ~ Tablespace names (tablespace) .. []
5 ~ Table owner (owner) ............ []
6 ~ Table names (table) ............ [GLPCA]
7 - Confirmation mode (confirm) .... [yes]
8 - Extended output (output) ....... [no]
9 - Scrolling line count (scroll) .. [20]
10 - Message language (language) .... [E]
11 - BRSPACE command line (command) . [-p initRQ1.sap -s 20 -l E -f
tbreorg -t "GLPCA"]
Standard keys: c - cont, b - back, s - stop, r - refr, h - help
BR0662I Enter your choice:
BR1001I BRSPACE 7.00 (41)
BR1002I Start of BRSPACE processing: sehujakt.tbr 2012-02-01 16.11.59
BR0484I BRSPACE log file: /oracle/RD1/sapreorg/sehujakt.tbr
BR0280I BRSPACE time stamp: 2012-02-01 16.12.03
BR1009I Name of database instance: RD1
BR1010I BRSPACE action ID: sehujakt
BR1011I BRSPACE function ID: tbr
BR1012I BRSPACE function: tbreorg
BR0280I BRSPACE time stamp: 2012-02-01 16.12.08
BR0657I Input menu 353 - please enter/check input values
Options for reorganization of tables: SAPRD1.GLPCA (degree 1)
1 ~ New destination tablespace (newts) ........ []
2 ~ Separate index tablespace (indts) ......... []
3 - Parallel threads (parallel) ............... [1]
4 ~ Table/index parallel degree (degree) ...... []
5 - Create DDL statements (ddl) ............... [yes]
6 ~ Category of initial extent size (initial) . []
7 ~ Sort by fields of index (sortind) ......... []
8 - Table reorganization mode (mode) .......... [online]
Standard keys: c - cont, b - back, s - stop, r - refr, h - help
and its execution was 15 hours
Now this same process we have to do in production, the table has 329GB
GLPCA approx.
This table is archived run now do the reorganization is required to
restore the real space in the table.
I need to run this reorganization with the best option from Sete to avoid
the high execution time of 15 hours in quality, because on average
production would be 35 hours in such execution to this table and not so
far achieved the best way to try to reduce the execution time for this
process of reorganization.
Thanks for your attention, I look forward to your comments
Regards

Answer 1

Hi,
Here is a simple execution of an online table reorganization:
-- Check table can be redefined
EXEC Dbms_Redefinition.Can_Redef_Table('SCOTT', 'EMPLOYEES');
-- Create new table with CTAS
CREATE TABLE scott.employees2
TABLESPACE tools AS
SELECT empno, first_name, salary as sal
FROM employees WHERE 1=2;
-- Start Redefinition
EXEC Dbms_Redefinition.Start_Redef_Table( -
  'SCOTT', -
  'EMPLOYEES', -
  'EMPLOYEES2', -
  'EMPNO EMPNO, FIRST_NAME FIRST_NAME, SALARY*1.10 SAL);
-- Optionally synchronize new table with interim data
EXEC dbms_redefinition.sync_interim_table( -
  'SCOTT', 'EMPLOYEES', 'EMPLOYEES2');
-- Add new keys, FKs and triggers
ALTER TABLE employees2 ADD
(CONSTRAINT emp_pk2 PRIMARY KEY (empno)
USING INDEX
TABLESPACE indx);
-- Complete redefinition
EXEC Dbms_Redefinition.Finish_Redef_Table( -
  'SCOTT', 'EMPLOYEES', 'EMPLOYEES2');
-- Remove original table which now has the name of the new table
DROP TABLE employees2;
Regards,
Venkata S Pagolu
Edited by: Venkata Pagolu on Feb 17, 2012 1:48 PM