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Status Future consideration
Workspace z/TPF Product Family
Categories z/TPF
Created by Guest
Created on May 11, 2022

RELATED IDEAS

Additional NVPC/ZMOWN metrics to assess LP eligibility (TPFUG/Visa)

Good candidate workloads to run LP must have a low CPU burn per LP redispatch rate to ensure they will get out of the way of transactional work. Currently, the only way to ballpark the CPU burn per LP dispatch is to use CPU consumed and DASD FINDs from ZMOWN or NVPC. This assumes that the only LP behavior demonstrated is on DASD I/O completion and that the workload does not do any parallel I/O. However, DASD I/O completion is not the only point of LP behavior differentiation amd if there is parallel I/O then the value obtained from CPU and DASD FINDs is also not an upper bound.


Requesting additional metrics be added to ZMOWN and NVPC that would provide more insight into :

1) how many times an ECB is dispatched

2) how many times an ECB dispatch would target the LP list if it were an LP ECB


It would also be helpful to have some idea how many ECBs are LP.

Idea priority High

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