OVNPM 1.5.2 - Performance Agent for NonStop Server Monitoring Guide

OVNPM Monitoring Configuration 13
2-1-1-2 Blacklisted Measurements
OVNPM can start up to five measurements. When USERDEF and BASE24DEF entities are declared in the
monitoring configuration, OVNPM searches in all Measurements where these USERDEF are bumped. This search
operation has a cost attached. The CPU and time cost can be reduced by excluding the measurements from the
search scope.
To achieve this, user edit BLACKLST file located in configuration subvolume. Each line contains a file name or a
pattern defining one or several measurements to exclude. BLACKLST pattern supports wildcard * and ?.
Following is a sample of blacklisted files.
$*.*log.dcmeas??
$data.myapp.measprs
$progs.meas.meas??
NOTE:
If a monitored USERDEF is bumped in a blacklisted measurement, OVNPM will not be able to collect it.
2-1-2 Database Parameters
Each data subvolume contains data for a specific year. The subvolume name matches the pattern OVPM(nn)
where nn is the last two digits for the year. For example, subvolume OVPM04 contains data for the year 2004.
Trend data is the permanent data. The product keeps them until you suppress them. To save disk space, you can
track backup data of previous years, delete them, and restore them when needed. Trend doesn’t require any
storage parameters. In contrast to the Trend data, Insight and Report are temporary data. OVNPM keep them for
period of time called Retention. The retention is expressed in days. Each time interval has it own retention period.
Report database has only one time interval. This time interval always equals the collect interval. Insight database
has 8 time interval. From 15 second up to 32 minutes. When retention is 0 day that means no data is saved to
this time interval.
NOTE:
By default 15s Retention day is 0. It must stay 0 while collect interval is 30s
The VCONF utility in the TACL subvolume allows you to change the retention periods. Run it and locate option 3
Edit database retention parameters from the main menu.
2-1-3 Choosing a Data Retention Period
For each time interval, you must also specify the number of days to retain data in the database. The longer the
period to retain data, the more days of recent performance history is available for review. However, you must
consider the amount of file space needed to store this information.
2-1-4 Data Retention Worksheet
You can use a data retention worksheet to record changes to the default retention periods for the collection files.
If you change the default values, you will need this information later during the installation procedure.
The Alphanumeric Data File contains detailed data for the SystemReport function.
The time interval of alphanumeric data equals the collection time intervals. Alphanumeric time interval can be 15
or 30 seconds. A time interval of zero implies no data retention.
After gaining performance experience with OVNPM, you can use the following information for tuning.
Time Interval
Default Retention Period in Days
SystemInsight
15 seconds
0
30 seconds
3
1 minute
0
2 minutes
4
4 minutes
0
8 minutes
5
16 minutes
0
OVNPM Monitoring
Configuration