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Spotlight on SAP ASE 2.12 - User Guide

Spotlight on SAP ASE
Background Information Desktop Features Connect to SAP ASE Spotlight® on SAP ASE Drilldowns Spotlight® on SAP ASE Alarms Glossary
Spotlight Basics
Spotlight Connections Monitor Spotlight Connections Alarms Charts, Grids And Home Page Components View | Options Troubleshooting
Spotlight History Spotlight on Windows
Connect to Windows Systems Background Information Home Page Alarms Drilldowns View | Options Troubleshooting
Spotlight on Unix About us Third-party contributions Copyright

Page Out Alarm

If an active process asks the kernel for more memory than there is immediately available, the kernel will write old memory pages out to swap space. This is known as paging.

To stop paging, make sure that there is enough RAM available to support the size of the processes you want to run.

 

Percentage Busy Alarm (Most Active Disk)

The Most Active Disk gauge in the Disk Activity panel shows the disk with the highest read/write rates.

The Percentage Busy alarm is triggered when the read/write rate of the most active disk exceeds a specified threshold.

A disk that is more than 20% busy (according to Sun Performance and Tuning by A. Cockroft) should be investigated, and possibly have data on it split up and moved to different disks.

The type of alarm that is activated is determined by the percentage of read/write activity experienced by the disk.

 

Related Topics

Swap Space Alarm

The Swap Space panel on the main Spotlight on Unix window shows the total amount of swap space allocated to the machine you are diagnosing, and the amount of swap space currently in use.

If the total amount of swap space allocated to a Unix host becomes full, the machine may halt all processes, or critical actions may be prevented from occurring. Running out of swap space may indicate a runaway process or an under-configured machine.

The type of alarm that is activated is determined by the percentage of swap space currently in use.

 

Related Topics

Swap In Flow Alarm

The Swap In Flow represents the number of processes swapped from disk per second.

A machine that is swapping processes to or from disk is usually under-configured for its workload.

The type of alarm that is activated is determined by the number of processes swapped from disk every second.

 

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