Understand availability and performance statistics in
Sybase Control Center.
The statistics you work with in Sybase Control Center can
be divided into two types:
- Availability statistics are concerned with present conditions;
they help you determine whether a resource you are monitoring (a server or an
agent, for example) is running and functioning properly.
- Performance statistics are concerned with behavior of the same
resources over time. They describe the flow of data through your environment.
You can use performance statistics to spot trends, identify problems like
resource bottlenecks, and make plans.
Sybase Control Center includes predefined key performance
indicators (KPIs) for each product module; these KPIs are grouped into collections. KPIs
such as server status, which serves as an availability statistic when it is fresh, have
long-term value as historical performance statistics.
Availability statistics appear on the heat chart and on resource monitoring screens in each product module.
Performance statistics appear on the statistics chart and on resource monitoring screens in each product module.
Some KPIs are included in the default collection for each product module. To make other KPIs available to the heat chart, statistics chart, and resource monitoring views, you must set up collection jobs in the scheduler. See the data collections help topic for information on data collections and the KPIs contained in them.
Several configuration options affect the collection and display of data
in Sybase Control Center:
- Collection repeat interval—The frequency of data collection. Set
this on the collection job in the scheduler.
- Screen refresh interval—The period between screen refreshes.
Refreshing the screen redraws it with the newest available data. Set the screen
refresh interval in the product module. (May not be settable in all product
modules.)
- Chart trend period—The period over which data is displayed in
historical charts. Set the trend period in the product module. (May not be
settable in all product modules.)