HP NonStop G-Series - Manual (Page 92)

Appendix C: OVNM Utilities 92
CHECKPWY
The CHECKPWY utility is executed during installs to investigate the MAXSPI values in the various PATHWAY
systems. If it detects PATHWAY environments with a MAXSPI setting too low, it provides a warning stating the
MAXSPI value should be increased. Increasing the value of MAXSPI requires the PATHWAY environment to be
bounced, so these needs to be scheduled. This TACL routine can be executed at any time.
To run the utility, specify the following command:
RUN CHECKPWY
The output is displayed on the terminal. The detailed information about the PATHWAY environments can be
found in CHKPWYO.
The value of MAXSPI is important, because once the number of processes that are opening PATHWAY exceeds
that limit; no new processes are allowed to open the Pathmon. There are two objects that open Pathmon in the
OVNM application: LSTCOM and ORMCOM. LSTCOM is used for object discovery. This is invoked when using
the Object Configuration Client or BatConf or when Auto Maintenance is processed.
Since LSTCOM assumes it will open Pathmon, perform the discovery and there is no need to reference the
PATHWAY process any more, it opens Pathmon, does the discovery and then closes Pathmon. Once monitoring
starts on a given Pathway object, the ORMCOM process assigned to that monitoring will keep the Pathway
process open, rather than opening and closing each polling interval. When MAXSPI is set too low, it is possible
that the first time you add a Pathway threshold, it works, but all subsequent threshold additions fail with “zero
objects added”. This is because LSTCOM is able to open Pathway the first time, but by the time you attempt to
add the second threshold, ORMCOM has opened Pathmon and there are no more SPI opens allowed.
Consequently, LSTCOM is not able to re-open the Pathmon process. At this point, you can
1. Bring PATHWAY down, increase MAXSPI and bring PATHWAY back up.
2. Follow tasks listed below.
a. Turn node monitoring off
a. Bounce OVNM
b. Add all your PATHWAY thresholds with INACTIVE monitoring
c. Turn node monitoring on
d. Update your PATHWAY thresholds to turn monitoring ACTIVE.
LSTCOM is the only process that opens Pathmon, until you are all done adding your thresholds. Once you
activate monitoring, then ORMCOM will grab the SPI open and use it ‘forever’. When you need to add new
Pathway thresholds, you will once again have to follow the procedures listed above.