Alter SHRINK SPACE in oracle 10g

Question

Hello,
My table PRICE_T table gets deleted and inserted almost 50 million records everyday.
Now it takes too much time to perform this operation because of TABLE fragmented.
i can use "CREATE table as select” option to remove fragmentation from table.
but i dont want to use this option.
so i hv tried ALTER TABLE SHRINK SPACE as i m using ORACLE 10g
alter table price_t enable row movement;
alter table price_t shrink space
alter table price_t disable row movement;
and i have applied following query to check table gets remove free space but still having free space after applying ALTER SPACE COMMAND
select table_name,round((blocks*8),2)||'kb' "size1",round((num_rows*avg_row_len/1024),2)||'kb' "size"
from DBA_tables
where table_name = 'PRICE_T';
Tablespace in PRICE_T table fall into is SEGMENT SPACE MANAGEMENT AUTO
please help me to remove fragmentation from table using SHRINK command.
Thanks.

Answer 1

Now it takes too much time to perform this operation because of TABLE fragmented.How do you define "fragmented"?
Why do you believe that your table is fragmented?
Why do you believe that the fragmentation is causing performance problems?
select table_name,
       round((blocks*8),2)||'kb' "size1",
       round((num_rows*avg_row_len/1024),2)||'kb' "size"
  from DBA_tables
where table_name = 'PRICE_T'; - What is the output of this query before and after you shrink the table?
- Are your statistics up to date? NUM_ROWS, BLOCKS and AVG_ROW_LENGTH provide information to the optimizer-- they are estimates gathered when object statistics are gathered. They are not maintained by Oracle in real time and may be substantially out of date.
- I don't see any attempt to account in this query for overhead like PCTFREE.
- Is there a reason that you aren't using the DBMS_SPACE package? This query seems highly suspect.
Justin