HP NonStop G-Series - Manual (Page 129)

Appendix P: Threshold Linking 129
Appendix P: Threshold Linking
This section contains information about a parameter that allows you to configure OVNM so it will minimize the
number of times it requests information about an object. This option must be manually turned on. The default
operation is to continue to work as it did in previous releases. This option is only supported for Base24, Filesys
and NetBatch thresholds. For these subsystems, when the same object is mentioned in multiple thresholds, the
information that is needed to evaluate that threshold is requested once per threshold. When this option is turned
on, the information is only requested once and then all thresholds are evaluated – at the same time. For example
– if you have thresholds for a given file for Percent Full > 70% and Index Levels > 2, with this option turned off,
OVNM will make two guardian calls to get the information and evaluate each threshold. With this option turn
on, OVNM will evaluate both thresholds after the first time it calls the guardian procedure.
This also means that if the multiple thresholds have different polling intervals, they will all be evaluated at the
lowest poll interval. OVNM already has all the information it needs to determine if the thresholds are in violation
or not, so there is no need to wait until the longer poll interval.
To turn this feature on, you need to create a Tacl routine called CUSTCHGS. If you don’t already have this Tacl
in place for other reasons, fup the SAMPCHGS file to CUSTCHGS and make the necessary changes so the
“ThresholdLinking” parameter is changed from No to Yes. This code will need to be in the fixup^the^monconf
routine.