OSI/MHS Configuration and Management Manual

Sizing and Tuning Your OSI/MHS Subsystem
OSI/MHS Configuration and Management Manual—424827-003
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Access Methods
Access Methods
OSI uses X25AM and PAM to access other systems. Configuration of attributes such
as frame size within X25AM can affect the speed of data transfer or delivery of
messages to adjacent MTAs. For more information on performance tuning for X25AM
and TLAM, see the X.25 Access Method (X25AM) Manual and the TLAM Configuration
and Management Manual.
TMF
The attributes you set for TMF can affect the performance of all databases
(configuration, registration, PDU stores, and MS) within OSI/MHS. For information on
performance tuning for TMF, see the TMF Planning and Configuration Guide.
Disk Configuration
Organizing resources such as cache memory can improve access speed to the
memory. For information on disk configuration, see the Guardian User’s Guide.
NonStop SQL
The way you set up and configure SQL catalogs affects the speed at which the
processes can access this information. For information on SQL configuration, see the
NonStop SQL Installation and Management Guide.
Monitoring Performance
The following tools can help you monitor the performance of your NonStop system in
general and of OSI/MHS in particular:
Measure
Measure is the most comprehensive utility HP offers for measuring performance of
your NonStop system. Use it to monitor:
•
CPU utilization for all CPUs in which OSI/MHS and its supporting software are
running. If CPU utilization is excessive, you might need to move processes to less
busy processors or to add processors to your system.
•
Interprocess message flows for OSI/MHS processes. Monitoring message flows
among OSI/MHS processes can help you identify cases in which to add more
groups to distribute the workload.
•
File I/O. Monitor use of message-store files by MS processes and of PDU store
files by other MHS processes. A disproportionate number of requests to one disk
process can be a signal that data should be distributed more evenly across disk
volumes.