UNIX Monitor anomalies

The UnixMonitor collector allows to insert the following types of anomalies in an Anomalies Profile:

CPU - %cpu total

%cpu total is the sum of cpu user, cpu system and cpu waiting.

CPU - %cpu Wait I/O

A high value can be the result of a disk-intensive workload or can indicate that the disk subsystem might not be balanced properly.

System - Processes per CPU

If the Processes per CPU is greater than 1, it indicates that there is at least one processes waiting for CPU. A high number of processes per CPU value will slow down system.

System - Processes in Wait Queue

Processes waiting for IO or suspended.

System - Context Switches

CPU context switches.

Paging - Paging in

The number of pages paged in from paging space, frequent and excessive paging is usually accompanied by poor system performance.

Paging - Pages Scanned

Pages scanned by clock algorithm per second. If the scan rate is over 200 pages/second, it can indicate that the system is short of memory.

Disk - Disk Use

Percent of time a disk is active. If it exceeds 70%, processes will wait for IO to complete.

Disk - Disk Service Time

Disk Service Time in milliseconds. A value greater than 30 ms can indicate a performance problem.

Disk - Queue Length

Number of transactions waiting for service.

Network - Input Errors Rate

Percentage of Input Errors to Input Packets. If this rate is > 1%, it can indicate a lack of memory (use 'netstat -m' for more information).

Network - Output Errors Rate

Percentage of Output Errors to Output Packets. If this rate is > 1%, it can indicate that the queue size is too small.

Network - Collisions Rate

Percentage of Collisions to Output Packets. If this rate is > 10%, it indicate a high network utilization.

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