Number of Agents monitored

[Anon Anon]

One collector can monitor how many agents?

Similarly One EM can Monitor how many agents?

[Michael Cook]

The limits on how many agents a collector can serve is more a case of how many metrics can the collector handle as that is far more relevant. The default maximum number of agents per collector is defined as 400 in apm-events-thresholds-config.xml

 

<clamp id="introscope.enterprisemanager.agent.connection.limit">
            <description>
                Limits the # of agent connections
            </description>
            <threshold value="400"/>

 

this is also where the default max number of live metrics is defined

 

 <clamp id="introscope.enterprisemanager.metrics.live.limit">
            <description>
                Per EM limit. Takes into account only live metrics (i.e. currently reporting from Agents)
            </description>
            <threshold value="500000"/>

 

A collector is just a specific type of EM so the answer is the same for both.

 

As for what the maximum number that can be handled that will very much depend on the specification of the system used and I would recommend reviewing the sizing guide APM Sizing and Performance Guide - CA Application Performance Management - 10.3 - CA Technologies Documentation 

 

thanks

Mike

[Legacy User]

Hi Priyanka,

 

Maximum number of agents per collector is 400.

 

Collector is also an EM with collector as a role.

 

Regards,

Mukesh Singh

 

On Oct 12, 2016 4:40 PM, "PriyankaThakur75811365" <

[Hallett German]

This is a "it depends question." The docs says the following on EM load 

Enterprise Manager Cluster Sizing and Performance Considerations - CA Application Performance Management - 10.3 - CA Tec… 

 

 

Enterprise Manager Workload

The Enterprise Manager workload is complex. These workload elements are the most important with respect to capacity:

• Number of monitored applications
• Number of application locations
• Number of frontends and backends
• Number of metrics that agents report
• Frequency and scope of metric queries from clients such as Workstation and WebView sessions
• CA CEM load
• CA APM business logic
• Number and complexity of alerts and dashboards

[Hallett German]

Dear Thakur: 

    Working with your account team may also help you determine the correct sizing/architecture for your environment. Mike,Mukesh, and myself have given you some guidelines to your question. Are you doing a sizing/architecture exercise? Were the above answers helpful and do you have what you need after reviewing the documentation? Or do you have some follow-up questions? Please let us know

 

Thanks

Hal German

[Anon Anon]

Thanks for the quick response

One collector can monitor 400 agents by default.

 

But in case I am working in clustered environment then in that case EM and Collector would be handling different load

 

So my question here is in the cluster environment one EM can handle how many collector by default ?

[Michael Cook]

An collector is a type of EM - as are MOM, and CDV

 

Is your question how many collectors can you have in a cluster i.e. per MOM then the answer to that is 10 max

 

Load balancing is done by a combination of the loadbalancing.xml file and the weighted average number of metrics per collector

 

see Configure MOM Agent Load Balancing - CA Application Performance Management - 10.3 - CA Technologies Documentation 

 

 

thanks

Mike

[Hallett German]

Dear  Priyank:

    Much of this is covered in detailed in the Sizing Guide including hardware/software requirements, best practices, and factors to consider. Mike has responded above on max number of collectors to MOM. Are there other questions that you wish to have discussed or do you have what you need to move forward with your cluster planning/deployment?

 

Please let us know

[Hallett German]

Marking as answered since references have been given and some comprehensive responses were given. There is little more that can be added on teh original question. Related questions may be posted if needed.