Apache Virtual Host Errors per Minute - Client Monitor

  • ID:  Microsoft.ApacheHTTPServer.VirtualHost.Unix.ErrorsPerMinute400.Monitor
  • Description:  Apache Virtual Host Errors per Minute - Client Monitor
  • Target:  Apache Virtual Host (Linux)
  • Enabled:  On Standard Monitoring

Operational States

Name State Description
Under Threshold Success Under Threshold
Over Threshold Warning Over Threshold

Overridable Parameters

Parameter Name Default Value Description Override
Interval 300 Interval in seconds
SyncTime   SyncTime
Threshold 10 Threshold
Number of Samples 3 Number of Samples

Alert Details

Monitor State Message Priority Severity Auto Resolution
Over Threshold (Warning) Apache Virtual Host Client Errors Medium Warning Yes

Run As Profiles

Name
Default

Monitor Knowledgebase

Summary

The amount of client server errors experienced when contacting the Apache virtual host is high. Apache HTTP Server performance may be adversely affected.

Apache 400 bad request errors are HTTP requests resulting in client errors made to the Apache virtual host.

The monitor threshold is analyzed against an average of values returned in polls to the agent where the Number of Samples parameter controls the number of samples included in the calculation of the average.

Causes

An unhealthy state indicates that the amount of bad requests made to the virtual host are currently high. The bad request could be caused by exceeding the header field limit set for the server.

Resolutions

To address Apache client errors on a virtual host choose one or more of the following options:

  • Increase the value for the Apache directive, LimitRequestFieldSize if bad requests are exceeding header field limit

  • Check for broken links in the web applications

External References
This monitor does not contain any external references.

See Also for Open Source Software Preview Management Pack


Downloads for Open Source Software Preview Management Pack

AZURE OPTIMIZATION ASSESSMENT GET STARTED
MIGRATION TO AZURE GET STARTED
SYSTEM CENTER MIGRATION TO AZURE GET STARTED
MIGRATION TO AZURE FOR SQL AND WINDOWS 2008 GET STARTED