Index rebuilding
- From: Steve Jelfs <steve@xxxxxxxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Fri, 12 Nov 2004 10:45:20 +0000
We have an index that we need to keep rebuilding in order for the CBO to
use it. What happens is that we build the index and queries use the
index. Then, after a couple of days the CBO reverts to full table
scans/. Re-analysing the table and index does not change anything but
re-building the index does.
The table holds transient data which is only ever about five days old
before it is "archived" off to another table. Wach row might get about
2/3 updates during it's short life.
Why might this be? We're using 8.1.7.4 on W2K if that helps!
Cheers
Steve
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