RE: Online "tablespace" reorg ?

10g OEM (Grid Control) appears to do online tablespace reorgs by means of generating a whole lot of code to perform dbms_redef and all the attending actions for all the objects in the tablespace. So you could conceivably generate such a script (without running it) via OEM on a test database, save it to a file, run it on test and then run it on your production system. First thing OEM will do is scan for objects that cannot be online redefined with dbms_redef. It will also tell you to set up an external proc for handling LONGs if you don't already have one setup. I wouldn't trust OEM to do it unsupervised even on a test system, though, at this point, as I've seen errors even on "successful" online table reorgs performed by it. I'm still researching it though, haven't run any tablespace reorgs yet.

Max Pakhutkin

-----Original Message-----

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org]On Behalf Of Bob Sent: Tuesday, June 28, 2005 5:54 PM
To: oracle-l_at_freelists.org
Subject: Online "tablespace" reorg ?

All-
Is there such a thing as online tablespace reorg?

All, I've been tasked to perform an "online reorg of our tablespaces"   From my research I come to these findings.

1 - tablespace reorg is not a popular topic and only seems to be available using oem which due to our diverse environment, I need to use a sqlplus script. From reading ask tom he is claiming there really isn't anything to "reorg" in a tablespace - recreate yes - reorg no Is this correct?

2 My plans would be to create new tablespaces using LMT and ASSM, then alter table move .. new tablespace. The LMT would minimizes future fragmentation and ASSM would benefit by using the alter table shrink; statement to alter the HWM in the future.

Questions,
1 - Is there such a thing as online reorg of tablespaces and if so documentation on its use?
2 - Are there any issues that I'm overlooking in item 2

Thanks
Bob

side note -dbms_refefination looks like what I've been told to look for but that is on the table level and not going to help because the tablespaces are DMT. I don't need to redef the tables I'm really looking to reclaim space from the tablespaces as well as putting the tables in LMT and ASSM mode
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http://www.freelists.org/webpage/oracle-l Received on Wed Jun 29 2005 - 16:41:19 CDT