• Forums
    • Public Forums
      • Community Connect
      • Dynatrace
        • Dynatrace Open Q&A
      • Application Monitoring & UEM
        • AppMon & UEM Open Q&A
      • Network Application Monitoring
        • NAM Open Q&A
  • Home
  • Public Forums
  • Application Monitoring & UEM
  • AppMon & UEM Open Q&A
avatar image
Question by Marc H. · May 30, 2012 at 04:26 AM ·

Incorrect CPU measures when multiple Worker Processes are used

Hello,

Windows 2008 Server R2 Standard

64bit

IIS 7

We are doing performance testing on one of out web applications.  During this testing we increased the max number of worker processes for an application pool to 3.  

During this testing we utilize the Load Test Monitoring Dashboard to monitor the health of the various system in the application environment.  After increasing the worker processes count to 3, we noticed that the CPU usage being displayed was incorrect.  It appears that either the CPU of one of the work process or an average of the three is being displayed.  So instead of saying the CPU on the webserver was 60% (which it was according to the task manager and Perfmon on the WebServer) dynatrace was was report 20%.  I tried changing the aggregate method from average to sum and the value was still incorrect (367% was displayed).  

Has anybody else encountered this problem?  The dynatraceAgent Configuration tool correctly shows all three worker processes.

Thanks,

-Marc

Comment

People who like this

0 Show 0
10 |2000000 characters needed characters left characters exceeded
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 10 attachments (including images) can be used with a maximum of 50.0 MiB each and 250.0 MiB total.

2 Replies

  • Sort: 
  • Most voted
  • Newest
  • Oldest
avatar image

Answer by Reinhard W. · May 30, 2012 at 02:57 PM

Hi Marc,

I assume you are running dynaTrace 4.1 already? Likely the three worker processes are aggregated into one set of measures as they have the same name. have you tried to use the unique agent names feature we've introduced with 4.1?
http://apmcommunity.compuware.com/community/display/DOCDT41/Unique+Agent+Names+with+Index

Reinhard

Comment

People who like this

0 Show 0 · Share
10 |2000000 characters needed characters left characters exceeded
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 10 attachments (including images) can be used with a maximum of 50.0 MiB each and 250.0 MiB total.

avatar image

Answer by Andreas G. · May 30, 2012 at 12:41 PM

Hi Marc

Have you opened a new Load Testing DAshboard after you switched to the 3 Worker Processes or have you used a previously opened? The Load Testing dashboard is dynamically generated and will change depending on the connected agents. That could be one explanation

You could try creating a new dashboard and add the pre-configured CPU chart to it - you will find this one in your Cockpit -> System Profile -> Charts. Let me know if this shows the individual CPU values of your individual worker processes

Andi

Comment

People who like this

0 Show 0 · Share
10 |2000000 characters needed characters left characters exceeded
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 10 attachments (including images) can be used with a maximum of 50.0 MiB each and 250.0 MiB total.

How to get started

First steps in the forum
Read Community User Guide
Best practices of using forum

NAM 2019 SP5 is available


Check the RHEL support added in the latest NAM service pack.

Learn more

LIVE WEBINAR

"Performance Clinic - Monitoring as a Self Service with Dynatrace"


JANUARY 15, 3:00 PM GMT / 10:00 AM ET

Register here

Follow this Question

Answers Answers and Comments

2 People are following this question.

avatar image avatar image

Forum Tags

dotnet mobile monitoring load iis 6.5 kubernetes mainframe rest api dashboard framework 7.0 appmon 7 health monitoring adk log monitoring services auto-detection uem webserver test automation license web performance monitoring ios nam probe collector migration mq web services knowledge sharing reports window java hybris javascript appmon sensors good to know extensions search 6.3+ server documentation easytravel web dashboard kibana system profile purelytics docker splunk 6.1 process groups account 7.2 rest dynatrace saas spa guardian appmon administration production user actions postgresql upgrade oneagent measures security Dynatrace Managed transactionflow technologies diagnostics user session monitoring unique users continuous delivery sharing configuration alerting NGINX splitting business transaction client 6.3 installation database scheduler apache mobileapp RUM php dashlet azure purepath agent 7.1 appmonsaas messagebroker nodejs 6.2 android sensor performance warehouse
  • Forums
  • Public Forums
    • Community Connect
    • Dynatrace
      • Dynatrace Open Q&A
    • Application Monitoring & UEM
      • AppMon & UEM Open Q&A
    • Network Application Monitoring
      • NAM Open Q&A