I have posted the issue to DERBY-5487. I have also attached the Java test
program. 

The test rows do insert at one end of the primary key and delete the other
end.. Interestingly, I noticed that primary key space is reclaimed if I
reuse the primary keys across the insert-delete loops. But, my application
requires me to use continuously increasing primary keys (not reuse them).


Mike Matrigali wrote:
> 
> Posting your test to a JIRA issue would be best.  It would be 
> interesting to post the space table results after each
> insert/delete/compress iteration (or every 10, ...).
> When do you commit (every row or every 10000)?  Is it multi-threaded? 
> Does your
> test always insert rows at one end of the index and delete them
> from the other end.  If so it may be DERBY-5473 (a runtime issue,
> not a compress table issue).
> 
> 

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