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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Speed up Truncate tables
Chuan,
You can use the 'REUSE STORAGE' clause of truncate table. That's a heck of a lot faster if you have a whole load of extents allocated to the table. What it does is mark the table as empty and keep all extents.
However, I have a feeling that if you really want to release all storage, you'll have to suffer through the complete truncation (without reuse storage). I don't know if there's a way around that.
HTH
Lisa Koivu
Am I an Idiot? (and DBA)
Ft. Lauderdale, FL, USA
-----Original Message-----
From: Chuan Zhang [SMTP:chuan_at_asiaonline.net] Sent: Wednesday, August 15, 2001 4:10 AM To: Multiple recipients of list ORACLE-LSubject: Speed up Truncate tables
Hi All,
Is there any way to speed up the truncating a big table with 12 million rows?
Basically, I implemented truncating that big table on Production, but it affected the performance much, so I had to stop it in the middle of way. All the rows were truncated but the HWM was not shrunk at all. I want to do it again to get the space back. Is there any way to speed up this process?
Platform: Oracle EE8.0.6 and Solaris 2.7
Thanks a lot in advance.
Chuan
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Chuan Zhang
INET: chuan_at_asiaonline.net
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