Pausing the Shrink Command

Hello ALL,
We have recently purged some of the data on a huge table and right now the unused space is upto 350 GB. We need to reclaim the space.It's a 10 G database. But, since it's a resource intensive operation we have a requirement from the business that it should be stopped at the start of business day and commence it at the EOB.
Do you think we should kill the Shrinking operation at the EOB. does Oracle satrt the Shrinking operation where it stopped from.
P.S. this table has all LOB columns, LONG type columns. so, there is no possibility of expdp/MOVE.
Please throw your valuable inputs.
Thanks,

790658 wrote:
Hello ALL,
We have recently purged some of the data on a huge table and right now the unused space is upto 350 GB. We need to reclaim the space.It's a 10 G database. But, since it's a resource intensive operation we have a requirement from the business that it should be stopped at the start of business day and commence it at the EOB.
Do you think we should kill the Shrinking operation at the EOB. does Oracle satrt the Shrinking operation where it stopped from.
P.S. this table has all LOB columns, LONG type columns. so, there is no possibility of expdp/MOVE.
I thought that the shrink command was executed as a series of fairly small transactions - similar to the "index coalesce" mechanism.
I've just checked on a test I created some time ago, though, and in 11.1.0.6 I found that when the shrink command had to move 5,000,000 rows it ran the entire command as a single large transaction (500MB of undo, 1.1GB of redo).
This makes it look as if you cannot interrupt a shrink command - and if you did then you could have a massive rollback running for ages.
Have you looked at the dbms_redefinition package as an alternative.
Regards
Jonathan Lewis

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Gather stats after shrink command

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I have already done this in our test database and was preparing to do this in production, when one web site I went to said we should run fresh stats after the shrink operation.
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