Re: "Deallocate Unused" not releasing space above HWM

Hi Sriram
 I meant the space above HWM which is the wasted space. Also there were   more deletes on the same table. I think I should have been more clear. Sorry about the confusion.

Thanks and Regards
Vidya

k.sriramkumar_at_iflexsolutions.com wrote:

>Hi Vidya,
>
> I thought Deletes happen within the HWM....I am confused by your statement "deletes above the HWM".....Guru's pls correct me if I am wrong.
>
>Best Regards
>
>Sriram Kumar
>
>
>-----Original Message-----
>From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of vidya kalyanaraman
>Sent: Wednesday, March 10, 2004 5:58 PM
>To: oracle-l_at_freelists.org
>Subject: Re: "Deallocate Unused" not releasing space above HWM
>
>Hi All
> I am trying to reclaim the wasted space (huge deletes), which are above the HWM. I had analysed the table before and got the "empty_blocks" details from dba_tables.
>I am using the following query,
> alter table tab1 deallocate unused;
>and then to bring down the HWM,
>alter table tab1 move tablespace AR_DATA; ---- Moved within the same tablespace
>and then I had rebuilt all the corresponding indexes.
>As a last step, I had coalesced the tablespace.
>Next day (because SMON is not going to clear it up immediately), I had analyzed the tables again and got the "empty_blocks" details from dba_tables.
>When I look the empty_blocks, for some tables it has not yet released the space.
>
>Am I missing any steps? I searched Metalink, but it looks like I have covered everything that needs to be.
>I have one more question. To really reclaim the space, do I have to move the table out of its own tablespace ?
>Any thoughts are most welcome.
>
>Thanks and Regards
>Vidya
>
>
>
>
>
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-- 

Vidya Kalyanaraman
Phone: +91 80 5108 4285
Fax:+91 80 5506749

Principal Consultant
iTech Practice

Oracle Solution Services India
PBC software Park
Level 1 and 2
No. 9 Hosur Road
Bangalore - 560 029
India
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