Elevating Parsing Priority - comment by Roopalini

Hi Carrie,
Thanks for the wonderful article. Could you let me know, if there are any reasons for EXPLAIN to run for long time? One of the users on the box is trying to optimize his query and when he runs a explain on the query, it takes 23 seconds to just run the explain. I checked the DBQLOGTBL and found that the parseCPUTime is 23 seconds. I am unable to understand why running an EXPLAIN should take 23 seconds to give the output? Since we have TASM enabled, I was thinking if the workload priority is causing it, however I ran the query with system ID and it still took the same 23 seconds and so I ruled out TASM. Could you help me understand the reason ?
Thanks