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 |
|
● Memory utilization ● Paging-in and paging-out of data from working memory |
|
● Disk utilization information ● LAN activity |
|
● Workload due to particular 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 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.
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.
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.