Adding monitor is failed in enterprise admin server

How is the Managed server selected by APM using load factor?

In order to find if a particular Applications Manager installation is heavily loaded you can use the Load Factor, which is provided in the 'Support' tab under the 'Applications Manager Installation Information' category. The Load Factor can be denoted by x.y where x represents Managed server polling load factor and y represents Managed server data base load factor

The load factor follows the format x.y, where 'x' represents load on Applications Manager Server, while 'y' represents the load on the Database used by Applications Manager. A value of zero represents least loaded, while a value of nine represents most loaded. Hence Load Factor can take values from 0.0 to 9.9 (heavily loaded). The Load Factor of each of the Managed Servers is also displayed in the Admin server under the "Managed Servers" option and you can use the same to distribute load evenly among the Managed Servers. The Maximum value of x,y can be configured in AMServer.properties file of Admin server:

• x - am.mas.polling.max.loadfactor - default value 5
• y - am.mas.database.max.loadfactor - default value 5

The value can be configurable in AMServer.properties. The key is am.max.monitorcount.mas and default value is 500.

x < maxAllowedValueOfPollingLoad (and)
y < maxAllowedValueOfDatabaseLoad (and)
n < maxMonitorAllowed

If the condition is not matched then we show the "No Managed server is available" message to the user.

However, while adding a new monitor from an Admin server, the managed server under which the monitor is to be added can be selected manually by the user or using load factor by Applications Manager. The value for Maximum monitors allowed per Managed server can be configured in AMServer.properties. The key is am.max.monitorcount.mas and default value is 500.

 

• Selecting Managed Server Using Load Factor:

You can select one of the following options in the Add Monitor Page:

• Least Loaded Managed Server from all Managed Servers
• Least Loaded Managed Server from a Managed Server Group

Managed Server Groups:

Certain resources can be monitored from managed servers running in the same domain/ geographical location as the resource. Load factor calculation across all the distributed managed servers can result in the addition of a monitor in a server located in another domain (since the load factor condition matches). Grouping managed servers in the same area gives the user the option to use load balancing within the group of managed servers.