Skip to main content

Tips to Counter JMeter Out of Memory Error

Often while running load test with too many users, JMeter may experience out of memory error. Reasons for this error could be many. And troubleshooting the error takes a significant amount of time. Therefore to help you in debugging JMeter out of memory error, here we have listed down some possible culprits and some solutions to counter them.
Let’s check out each of them in detail.
  • Heap memory: JMeter may require more Heap memory than the allocated. It is set to 512 MB by default. You can increase that limit to allow more Heap memory to JMeter. For this, edit your jmeter.bat file in any editor and change values of “set HEAP=-Xms512m -Xmx512m” parameter.
  • GUI mode: If you are not debugging your JMeter script, it is advisable to run it in Non-GUI mode. Click here to know more about it. Running JMeter in Non-GUI mode ensures less resource consumption.
  • Listeners: Disable listeners such as Graph Result, View Result Tree which requires more system resources. Only use these listeners if you are debugging your JMeter script.
  • JMeter version: Always use latest version of JMeter as they come with stability and performance improvements.
  • Post-processors: Post processors in your JMeter script consumes resources. Use them wisely and efficiently. Disable/Remove them if they are not required.
  • Script complexity: Make sure your JMeter script is not unnecessarily complex. JMeter will hog much more resources if your script happens to be complex. Consider taking necessary steps to simplify your script.
  • Your system upgrade: If all else fails, consider upgrading your system CPU/RAM as it may be the cause of bottleneck.
Did you find the above tips to counter JMeter out of memory error useful? Do you know any more possible solution to tackle this problem? If you have any more suggestions, do share with us using comments below.
Labels:

Comments

Post a Comment

Popular posts from this blog

A Tutorial to Send Email using JMeter

Sending email is a mundane activity in any professional’s life. It’s a common medium for communication nowadays. Therefore performance testing of email server is not only important but necessary for an organization. JMeter can be helpful to perform load testing in such scenarios. In this tutorial, we will see how JMeter can be used to send email. We will use SMTP Sampler of JMeter to send an email. JavaMail API is needed to enable email functionality in JMeter. Download it from  here  and paste the jar in JMeter’s lib folder. Now, perform below steps to configure SMTP Sampler. Add a new Thread Group under Test Plan. Right click on Thread Group and select Add–>Sampler–>SMTP Sampler. We need to populate SMTP server’s details in this sampler. We will use GMail for sending an email. For this, enter these values in SMTP Sampler fields. Server: smtp.googlemail.com, Port: 587. Provide values in Email Address From and To fields of Mail Settings section to specify sender...
Post a Comment
Read more

JMeter Exceeded Maximum Number of Redirects Error Solution

While running performance test, JMeter allows maximum 5 redirects by default. However, if your system demands more than 5 redirects, it may result in JMeter exceeded maximum number of redirects error. In this post, we have listed down steps to overcome this error. Actual error in JMeter: Response code: “Non HTTP response code: java.io.IOException” Response message: “Non HTTP response message: Exceeded maximum number of redirects: 5” This error is noticed because  JMeter  allows maximum 5 redirects by default and your system may be using more than 5 redirects. You need to increase this count to more than 5 in jmeter.properties file. Follow below steps to achieve this. Navigate to /bin directory of your JMeter installation. Locate jmeter.properties file and open it in any editor. Search for “httpsampler.max_redirects” property in opened file. Uncomment the above property by removing # before it. Change to value to more than 5 Eg. 20. Save the file and restart JMet...
Post a Comment
Read more

Difference Between Redirect Automatically and Follow Redirects in JMeter

In this post, we will highlight important difference between Redirect Automatically and Follow Redirects options. These options are found in HTTP Request sampler of JMeter. Knowing the difference will help you decide your performance test strategy. When you check Redirect Automatically option, JMeter will not consider redirect as separate HTTP request. This in turn may result as lower response time in your overall performance test. Whereas Follow Redirect option will consider each redirection as separate requests. This may result in comparatively higher response time. This only has any effect if “Redirect Automatically” is not enabled. To see the difference between these two, record a sample script and run it by checking Redirect Automatically and Follow Redirects option. The second option will generate more requests in your result listener. As you can see from the above post, knowing the difference between Redirect Automatically and Follow Redirects option makes difference i...
Post a Comment
Read more