Lee, Gary D. wrote:
TSM v4.2.1, sun 3500, solaris 2.8, 2gb memory, 288gb disk.
TSM 5.1 solaris 2.8 8gb mem
Currently have a database of approximately 6.5gb at 77% utilization. Dbbufsize is currently set at 192mb. Cash hit starts out very good at 99-99.5% but creeps downward throughout a weeks run to around 97%.
dbbufsize 2G
I have looked in the admin guide, and they recommend a cash hit ratio of over 98%. However, no matter what I try, I can never seem to hit it.
I had the exact same issue. it seem like the algorithm to determine cache hit ratio gets skewed over time, because of the various db intensive activities that can occur over time. we trend our db cache hit % every five minutes and saw this 'slow leak'. i called support and they recommended clearing the stats. we now clear the cache hit ratio every 24 hours and we have been staying above 98%. now we have identified the creation of offsite tapes drags the cache hit down, which is OK. the rest of the day, the cache hit % is fine. muncie, IN is cool ;) -- Scott Walters Packet Pusher - "The world speaks IP" Mack Trucks, WHQ http://www.MackTrucks.com 2100 Mack Boulevard Ph: 610.709.3728 Allentown, PA 18103 Fx: 610.709.2809
