RE: Speed up Truncate tables

Check the extent sizes... truncate can take a VERY long time if there are a very large number of extents. At one point we had a large table with approximately 60,000 extents (accidentally created with INITIAL/NEXT 80k MAXEXTENTS UNLIMITED), which took about 2.5 hours to truncate. After recreating it sane extent sizes, it now takes only a few seconds.

> -----Original Message-----
> From: chuan [mailto:chuan_at_asiaonline.net]
> Sent: Wednesday, August 15, 2001 3:10 AM
> To: ORACLE-L
> Cc: chuan
> Subject: 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
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Chuan Zhang
> INET: chuan_at_asiaonline.net
>
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