Can you post the SELECT?

>Thank you Sergey. Differences are clearly indicated by the results of SYS(3054,11).
>
>When I LIST STATUS it appears to me that all of the tags and collation sequences are identical. Can you (or anyone) give me some guidance as to me what else I need to check? I am obviously missing something.
>
>One more slowdown clue. The very first user in the morning does not, at first, see the speed degradation. However, as soom as a second user opens the .DBC's files the slowdown occurrs. Again, this behavior only appeared last week. For years previously we never experienced this issue.
>
>Below are both the "fast" an "slow" results of SYS(3054,11):
>
>* Slow ( Approx. 20 seconds):
>Using index tag Ptname to rushmore optimize table patient
>Rushmore optimization level for table patient: partial
>Rushmore optimization level for table subscriber: none
>Rushmore optimization level for table medcert: none
>Rushmore optimization level for table typepick: none
>Rushmore optimization level for table certkey: none
>Rushmore optimization level for table meddetail: none
>Rushmore optimization level for table procdetail: none
>** The differences follow:
>Joining table typepick and table medcert using temp index
>Joining table certkey and intermediate result using temp index
>Joining intermediate result and table meddetail using index tag Meddtlkey
>Joining table subscriber and intermediate result using temp index
>Joining table patient and intermediate result (Cartesian product)
>Joining intermediate result and table procdetail (Cartesian product)
>
>
>* Fast (< 1 second):
>Using index tag Ptname to rushmore optimize table patient
>Rushmore optimization level for table patient: partial
>Rushmore optimization level for table subscriber: none
>Rushmore optimization level for table medcert: none
>Rushmore optimization level for table typepick: none
>Rushmore optimization level for table certkey: none
>Rushmore optimization level for table meddetail: none
>Rushmore optimization level for table procdetail: none
>** The differences follow:
>Joining table patient and table meddetail (Cartesian product)
>Joining intermediate result and table subscriber (Cartesian product)
>Joining intermediate result and table medcert (Cartesian product)
>Joining intermediate result and table procdetail (Cartesian product)
>Joining intermediate result and table typepick (Cartesian product)
>Joining intermediate result and table certkey (Cartesian product)
>
>Thanks again!
>
>Spencer