Operating System Monitor Data: File System and LAN (SAP Library

Operating System Monitor Data: File System and LAN

Definition

The operating system monitor displays the following data for hard disks, LAN, and file systems:

For all physical hard disks on a host:

Device name of the hard disk
Hard disk usage – percentage of the time in which the hard disk is being used
Average wait queue length of an input/output request
Wait time in milliseconds during which a request waits in the wait queue
Service time in milliseconds for an input/output
Transferred kilobytes per second
Number of disk operations per second

For all file systems on a host:

Name of the file system
Capacity of the file system in megabytes
Free storage space in the file system in megabytes

For all LAN interfaces on a host:

Name of the LAN interface
Data packets received per second
Data packets sent per second
Errors for received packets per second
Errors for sent packets per second
Collisions per second, in which two stations transport a packet at the same time on the same channel; this leads to the destruction of both packets and means that they must be sent again

Some values are not specified in some network interfaces; for example, there may not be a value for collisions per second in a token ring architecture. The values specified here do not describe the actual network traffic. They describe the transfers performed with this interface. This means that the errors displayed here refer to the interface and not to the actual network segment.

Use

The system displays the specified data when you call the operating system monitor.

In the detail data, the system also displays data for all hard disks and for all file systems of a server, and the performance history of the last 24 hours and 30 days (see also Detail Data of the Operating System Monitor).

To call the individual functions in the table, choose the Detail Analysis menu in the operating system monitor.

Function	Menu Path
Check the current usage of the file systems	→ Goto → Current Data → Snapshot → Filesystem detail
Check the current usage of the hard disks	→ Goto → Current Data → Snapshot → Disk detail
Check the current usage of the LAN	→ Goto → Current Data → Snapshot → LAN detail
Check the usage of the file systems for the last 24 hours	→ Goto → Current Data → Previous hours → Filesystem detail
Check the usage of the hard disks for the last 24 hours	→ Goto → Current Data → Previous hours → Disk detail
Check the usage of the LAN for the last 24 hours	→ Goto → Current Data → Previous hours → LAN detail
Check the file system, hard disks, and LAN for the previous days for a server	→ Goto → Performance Database → Compare recent days
Check the file system, hard disks, and LAN for the previous days for various servers	→ Goto → Performance Database → Compare all servers

See also:

Operating System Monitor Data: CPU

Operating System Monitor Data: Memory Management

Operating System Monitor and Operating System Collector SAPOSCOL initial pages.