cache Hit Pct in TSM server

tsmboys

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PREDATAR Control23

Hi

My tsm server is showing the cache hit pct as 94.98 and in our of threads i have studied that the cache hit pct should be 99 for better performance of
TSM server.

tsm: BGL-SVR-EBS>q db f=d

Available Space (MB): 50,016
Assigned Capacity (MB): 50,000
Maximum Extension (MB): 16
Maximum Reduction (MB): 36,324
Page Size (bytes): 4,096
Total Usable Pages: 12,800,000
Used Pages: 2,997,488
Pct Util: 23.4
Max. Pct Util: 27.4
Physical Volumes: 2
Buffer Pool Pages: 8,500
Total Buffer Requests: 3,287,269
Cache Hit Pct.: 94.98
Cache Wait Pct.: 0.00
Backup in Progress?: No
Type of Backup In Progress:
Incrementals Since Last Full: 0
Changed Since Last Backup (MB): 2.07
Percentage Changed: 0.02
Last Complete Backup Date/Time: 02/04/09 06:44:36
Estimate of Recoverable Space (MB):
Last Estimate of Recoverable Space (MB):

can anybody suggest me to improve the performance.
 
PREDATAR Control23

Are You using custom select satements often? Is your server performance dropping?

Once I've killed cache hit ratio by using custom select statements, but i had to generate some reports for my management. Also try spreading db to more vols, implement dbvol mirrors and so on. Try also putting db vols and db mirs on separate physical volumes with high speed IO's (local disks are good). Avoid also placing logvols and dbvols on the same physical volume.
 
PREDATAR Control23

Hi

Sorry i got that answer from one of threads before i could get reply from you.

Thanks for your reply

I have solved this problem by increasing the buffpool size to 1/8 of
memory size.
 
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