shrink huge datafile

Question

shrink huge datafile

sgt500

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Points: 1413
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November 3, 2015 at 2:14 am

#306281

after a huge data purging i've to shrink 1 datafile from 2tb to 100gb, but in this file there is an always accessed table
(insert new records mostly).
which is the best approach to perform this shrink without causing locks on table? i think about an step by step shrink
(eg from 2tb to 1,8tb ecc..)
what do u think?

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Justin Manning SA Hall of Fame Points: 3190 More actions · Answer 1

The table(s) you purged all the data from, wouldn't it help if you dropped and recreated the clustered index(es)?

That way you are resizing the actual tables you purged and the other tables being accessed wont be affected as opposed to doing a database shrink, which would require you to reorganize or rebuild your indexes anyway?

I've never tried it, but would be interested in what others think.

hmmm.. although, it still wont resize your data file... will be interested to hear

sgt500 Default port Points: 1413 More actions · Answer 2

there is only that table in this DF,

btw i've done the job

resize step by step without causing locks

I do all the maintenance tasks (rebuild nonclustered indexes and reorg pk (can't rebuild offline), and update table stats) after the shrink, seems it works well

Jeff Moden SSC Guru Points: 1004339 More actions · Answer 3

Was this on purge some form of audit table?

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

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