Operating System Monitor

Purpose

An SAP instance runs within an operating system. The operating system provides the instance with the following resources:

Virtual memory
Physical memory
CPU
File system administration
Physical disk
Network

Bottlenecks in these areas can significantly affect SAP system performance. You can use the operating system monitor to monitor the system resources that the operating system provides. The operating system collector SAPOSCOL collects these resources.

The operating system monitor helps you to identify the cause of a performance problem. If the source of the problem is in the operating system, you can use external tools or other external means to analyze it further and solve it.

The performance indicators are

Performance Indicator	More Information
Average CPU load and utilization	Operating System Monitor Data: CPU
Memory utilization Paging-in and paging-out of data from working memory	Operating System Monitor Data: Memory Management
Disk utilization information LAN activity	Operating System Monitor Data: File System and LAN
Workload due to particular processes	Operating System Monitor Data: Processes

Implementation Notes

For the data to be available, the operating system SAPOSCOL must be running on the monitored hosts. For hosts with SAP NetWeaver components, this is always the case; for hosts with no SAP NetWeaver components, you need to install a SAP NetWeaver management agent on the host (more information: Downloading and Installing the SAPHOSTAGENT).

Integration

To be able to centrally display operating system data for as many hosts as possible, note the following points:

Call the operating system monitor in the central monitoring system (CEN). More information about central monitoring: Configuring the Monitoring Architecture.
To be able to display data for the last 30 days in the operating system monitor, you need to have set up the Central Performance History in CEN (more information: Configuring the Central Performance History).

Features

To call the operating system monitor, you can enter one of the following transaction codes:

As of SAP NetWeaver 7.1, enter OS06, OS07, or ST06.
Note
The different transaction codes exist for historical reasons; the function started when you enter the transaction codes is identical in each case.
For SAP NetWeaver 7.0, as of EhP 2, enter OS06N

You can display operating system data for the following hosts in the operating system monitor:

All hosts on which instances of the local system are running
All hosts with agents that are registered with the local system
All hosts on which instances of monitored systems are running (that is, the systems must be entered in the monitoring infrastructure of the local system as monitored systems; more information: Registering SAP NetWeaver Components and Hosts in CEN)

When you call the operating system monitor, the system shows all relevant selection options and the displayed operating system data on a single screen, which avoids additional menus as far as possible (more information: Structure of the Display in the Operating System Monitor). This operating system monitor display consists of three parts:

Data source (top left)
In this part, you define the host from which the operating system data that you want to display is coming (more information: Selecting Operating System Data of Systems, Instances, and Hosts).
Analysis views (bottom left)
In this part, you define the time period (more information: Selecting Current Values and History of Operating System Data) and the topic area (more information: Selecting the Views of the Operating System Monitor) for which you want to display operating system data.
Output area (right)
The operating system data that matches your selection in the above areas is displayed here.

Note
To update the data displayed on the screen, choose Refresh. Since, by default, SAPOSCOL collects data in 10 second intervals, you do not always obtain new data by choosing Refresh.