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  2. MIDRANGE-L
  3. January 2007

RE: SQL / DB2 and need for "Index Rebuild" or RUNSTATS

Indexes are maintained as the underlying data changes and with binary

radix

tree indexes the tree is always optimized, i.e. it is not necessary to
reorganize indexes or keyed logical files. 


I'd be curious to see any technical documentation on how the tree is
always optimized. It still needs to be a trunk/branch/leaf structure,
no? 

Regardless, a rebuild, preferably as a SQL index, not a DDS logical (see
Dan Cruikshank's "iSeries Database Reengineering" PDF) would result in
physical storage optimization, and if it's a SQL index would result in
64K pages too -- a real boon to performance, even from HLL IO.

-Walden

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