Expert Advice

OS390_Cache_FastWriteHitPt_Crit  
Situation Description
Suggested Actions
Situation Description

DASD Cache Fast Write Hit Critical Situation

 

Suggested Actions

The DASD Fast Write hit ratio is less than the Critical percentage. This may or may not represent a problem. If no service class is missing goals based on I/O delay, the threshold may have to be adjusted. If service class periods are missing goals based on delay from the indicated device, data sets may have to be moved so that the Fast Write Cache capacity will be better matched to the workload.

 

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