Sun Java System Web Server 7.0 Administrator's Guide

Modifying Monitoring Parameters

The server performs monitoring actions through SNMP. SNMP is a protocol used to exchange data about network activity. With SNMP, data travels between a managed device and a network management station (NMS). A managed device is anything that runs SNMP: hosts, routers, your web server, and other servers on your network. The NMS is a machine used to remotely manage that network. Usually, the NMS software will provide a graph to display collected data or use that data to make sure the server is operating within a particular tolerance.

The NMS is usually a powerful workstation with one or more network management applications installed. A network management application such as HP OpenView graphically shows information about managed devices, such as your web servers. For example, it might show which servers in your enterprise are up or down, or the number and type of error messages received. When you use SNMP with the Sun Java System Web Server, this information is transferred between the NMS and the server through the use of two types of agents, the subagent and the master agent.

The subagent gathers information about the server and passes the information to the server’s master agent. Every Sun Java System Web Server, except for the Administration Server, has as subagent.


Note –

After making any SNMP configuration changes, you must click the Save button, then restart SNMP subagent.


For changing settings for the configuration, perform the following tasks:

  1. Click Configurations tab.

  2. Select the configuration for which you need to change monitoring settings.

  3. Click Monitoring Settings sub tab

Configuring Monitoring Parameters

For changing general monitoring settings for a configuration, edit the values under the General Settings section. The following table provides the field description of general monitoring parameters:

Table 13–2 Field Description > General Monitoring Settings

Field

Description

SNMP subagent

In general, to use SNMP you must have a master agent and at least one subagent installed and running on a your system. You need to install the master agent before you can enable a subagent.

Select this option to enable/disable SNMP subagent. 

Interval

The poll interval is the number of seconds between updates of the statistics information displayed. 

If your server instance is running, and you have enabled statistics, you see a page displaying the kind of statistics you selected. The page is updated every 5-15 seconds, depending upon what you chose for the poll interval. 

Profiling

You can use the statistics/profiling feature to monitor your server’s current activity. The statistics show you how many requests your server is handling and how well it is handling these requests. You can view some statistics for individual virtual servers, and others for the entire server instance.  

Select this option to enable/disable profiling. 

Configuring SNMP Subagent Parameters

For changing SNMP subagent settings for a configuration, edit the values under the SNMP Subagent Settings section. The following table provides the field description of SNMP Subagent parameters:

Table 13–3 Field Description > SNMP Subagent Settings

Field

Description

Enabled

In general, to use SNMP you must have a master agent and at least one subagent installed and running on a your system. You need to install the master agent before you can enable a subagent.

Select this option to enable/disable SNMP statistics collection. 

Master Host

Enter the name and domain of the server (UNIX only).

Description

Enter a short description for the server including operating system information. 

Organization

Enter a short name representing the organization. 

Location

Enter the location information of the server in this field. 

Contact

Enter the contact information of the server in this field.