Bill, I launched some BACKUP STORAGEPOOLs, and checked glance as you suggested. I have about 12 screens' worth of threads under dsmserv (standard 25-line screen size). I did locate a few threads that seem to correspond to the tapes being used by the backup, and they seem to alternate between IO wait and SYSTM wait (which I would expect for I/O processes). The CPU util for these threads is somewhat higher than the other dsmserv threads, but nowhere near what you are seeing.... mine are around 5%. These were using my DLT8000 drives.... maybe there's and issue with the older drives, or with HP-UX 11.0? (We have 11i). I'll keep looking over the next few days.
Robin |---------+------------------------------> | | "Slaughter, Bill" | | | <[EMAIL PROTECTED]| | | ERWARE.COM> | | | Sent by: "ADSM: | | | Dist Stor Manager" | | | <[EMAIL PROTECTED]| | | DU> | | | | | | | | | 10/15/03 10:42 AM | | | Please respond to | | | "ADSM: Dist Stor | | | Manager" | | | | |---------+------------------------------> >-----------------------------------------------------------------------------------------------------------------------------------------| | | | | |To: [EMAIL PROTECTED] | |cc: | |Subject: | | Re: High CPU Consumption on Tape Threads in DSMSERV | >-----------------------------------------------------------------------------------------------------------------------------------------| Robin, I selected the threads of the DSMSERV process with glance using option "G". All threads were listed (3 pages). If you use the "+" and go to the last page you may be able to see some waiting on I/O. These are more than likely the Tape threads. When active doing MIGRATION or BACKUP STORAGE POOL these consume high amounts of CPU, SPACE RECLAMATION and MOVE DATA will also but it depends on the density of the data on the tape. I was able to compare a couple of ways, I regressed the driver back to stape for all my tape drives except 1 and can show the high CPU. I also still have a 4.2.3.2 system around and a test system I can configure and play with. Bill Slaughter Tupperware 407-826-4580