Availability and performance statistics can help you determine whether
your systems are running as efficiently as possible.
Availability statistics are concerned with present conditions; they help
you determine whether a system component you are monitoring (a server or a storage
device, for example) is running and functioning properly. Performance statistics are
concerned with behavior of the same components over time. You can use them to spot
trends, identify problems or potential problems, and make plans.
SAP Control Center includes predefined key performance indicators (KPIs)
for server that are grouped into collections. KPIs such as Server Status, which serves
as an availability statistic when it is fresh, also have long-term value as historical
performance statistics.
Availability statistics appear on the heat chart and on the screens of
the SAP Adaptive Server Enterprise monitor for each server. The heat chart includes
these KPIs:
- Server Status (up or down)
- Server CPU Utilization
- Number of Blocked Processes
- Number of Suspended Processes
These KPIs are part of the default collection: collection_ase_availability.
Performance statistics appear on the statistics chart and on the screens
of the SAP Adaptive Server Enterprise monitor for each server. In the statistics chart,
you expand folders in the Statistics tab to drill down to specific KPIs. See the KPI
values as tables or graphs, and compare them by displaying several KPIs together. These
are the folders that contain KPIs you can use to display data:
- Server Overview
- Devices
- Engines
- Segments
- Data Caches
Cluster configurations have these additional folders on the statistics chart:
- Cluster Instances
- Cluster Workload
- Logical Clusters
- tempDBs Activity
To make specific KPIs available to the statistics chart and to the SAP
Adaptive Server Enterprise monitor screens that use them, in addition to the
availability statistics scheduled by default, set up collection jobs in the scheduler
for:
- collection_ase_histmon – the KPIs in this collection are
available only in the statistics chart and for setting alerts.
- collection_ase_all_client_kpis – this collection is necessary to
gather statistics for historical charts in the SAP Adaptive Server Enterprise
monitor. The statistics are also available in the statistic chart and for
setting alerts.
Several configuration options affect the collection and appearance of
server data in SAP Control Center:
- Collection repeat interval – the frequency of data collection.
Set the repeat interval on the collection job in the scheduler. This option is
set when the collection is scheduled, but may be modified later.
- Screen refresh interval – the period between screen refreshes.
Refreshing the screen redraws it with the latest available data. This option can
be configured from the Settings window.
- Chart trend period – the period over which data appears in
historical charts. You can configure this option in the Settings window.