Clamped Agent

[osvaldog]

Hi everybody,

 

I've found a couple of agents clamped, how I could fix this situation?

[Hallett German]

Can a fellow APM admin or CA Partner help with giving an answer?

Osvaldo: Can you please provide a screenshot of what you are seeing?

[osvaldog]

Actually I can´t, because it is in one of our customers and I've been there yesterday and I won't back till next week, but I saw in the Investigator agent with a red circle arrow.

[Sergio Morales Correa]

Hi Osvaldo,

You can try to increase the clamp in the EM/collectors apm-events-thresholds-config.xml

However, you might want to investigate why you reached the clamp and what is causing the metrics explosion and then fine tune/reduce the agent instrumentation, this is an exercise that you would need to perform, for example

 

1- disabling automatic entry point detection feature
introscope.agent.deep.entrypoint.enabled=false

 

2-disable SmartInstrumentation instrumentation:
introscope.agent.deep.instrumentation.enabled=false
introscope.agent.deep.trace.enabled=false

 

3-reduce/disable JMX collection: set introscope.agent.jmx.enable=false

 

4-switch from full to typical pbl. The full profile provies greater visibility, but incurs higher overhead. It is recommended as a starting point for qa, staging and development environments

 

5-Turn off the socket tracers in toggles typical/full pbd file.
TurnOn: ManagedSocketTracing
TurnOn: SocketTracing
TurnOn: NIOSocketTracing
TurnOn: NIOSocketSummaryTracing
TurnOn: NIOSelectorTracing
TurnOn: NIODatagramTracing
TurnOn: NIODatagramSummaryTracing

 

6- If you noticed a high # of SQL metrics, disable/ reduce SQL instrumentation:

 

- Reduce the length of SQL statements. The default maximum length captured by the agent is 999. You can modify this by adding the following line to the IntroscopeAgent.profile file:
introscope.agent.sqlagent.sql.maxlength=

 

- Set the following properties available since 9.1:
introscope.agent.sqlagent.sql.turnoffmetrics=true
introscope.agent.sqlagent.sql.artonly=true
introscope.agent.sqlagent.sql.turnofftrace=true

 

- Use SQLAgent normalization mechanism - see Agent documentation

 

 

Also, if you need to remove unwanted metrics for the Agent you can always use the SS tool, see
https://www.ca.com/us/services-support/ca-support/ca-support-online/knowledge-base-articles.tec1337681.html
https://docops.ca.com/ca-apm/10-5/en/administrating/configure-enterprise-manager/configure-and-manage-smartstor-data#ConfigureandManageSmartStorData-UsetheSmartStorCommand-LineTools

 

I hope this helps,
Regards,
Sergio

[osvaldog]

Hi Sergio, thanks very much!!

[Hallett German]

Dear Osvaldo:
Was Sergio's response helpful? Did you make any progress when you return to he customer site? Marking as answered since some very good and clear next steps were provided.

 

However, we want to hear how you made out after making the suggested changes and if you have any followup changes

Thanks

Hal German

[osvaldog]

Hi German,

 

I'll investigate the line that Sergio addressed me. Thanks very much!