Expert Advice

OS390_Cache_Write_HitPct_Crit  
Situation Description
Suggested Actions
Situation Description

DASD Cache Write Hit Critical Situation

 

Suggested Actions

The Cache write hit ratio for the indicated device is less than the Critical threshold. Check to see if any address spaces that have this device number allocated are in service classes that are missing their goals. If so, a performance specialist should do further research to see if I/O tuning (data set placement) is necessary. If no goals are being missed the threshold might have to be adjusted.

 

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