Tools for Performance Evaluation in Linux - Revision history

Todd: /* Additional Performance Evaluation Resources */

2026-04-22T17:43:17Z

Additional Performance Evaluation Resources

Todd: /* Additional Performance Evaluation Resources */

2026-04-22T17:29:55Z

Additional Performance Evaluation Resources

Todd: /* Additional Performance Evaluation Resources */

2026-04-22T17:19:51Z

Additional Performance Evaluation Resources

Todd: /* Additional Application Testing Tools */

2021-11-09T18:26:10Z

Additional Application Testing Tools

Todd: /* Additional Application Testing Tools */

2021-11-09T18:25:32Z

Additional Application Testing Tools

Todd: /* Additional Performance Evaluation Resources */

2015-11-18T01:00:24Z

Additional Performance Evaluation Resources

Todd at 14:16, 11 November 2015

2015-11-11T14:16:30Z

Todd at 02:06, 11 November 2015

2015-11-11T02:06:35Z

Todd: /* Additional Application Testing Tools */

2015-11-10T19:20:51Z

Additional Application Testing Tools

Todd: /* Additional Application Testing Tools */

2015-11-10T19:20:23Z

Additional Application Testing Tools

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 [https://www.thomas-krenn.com/en/wiki/Linux_Performance_Measurements_using_vmstat Linux Performance Measurements using vmstat]
-[https://web.archive.org/web/20180325093837/http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried CPU Steal Time]
+[https://www.datadoghq.com/blog/understanding-aws-stolen-cpu-and-how-it-affects-your-apps/ CPU Steal Time]
 [https://aws.amazon.com/blogs/aws/choosing-the-right-ec2-instance-type-for-your-application/ Choosing the Right EC2 Instance Type]
 [https://developers.google.com/speed/pagespeed/insights/ Google PageSpeed Insights]

@@ Line 193: / Line 193: @@
 [https://web.archive.org/web/20180325093837/http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried CPU Steal Time]
 [https://aws.amazon.com/blogs/aws/choosing-the-right-ec2-instance-type-for-your-application/ Choosing the Right EC2 Instance Type]
 [https://developers.google.com/speed/pagespeed/insights/ Google PageSpeed Insights]

@@ Line 192: / Line 192: @@
 [https://www.thomas-krenn.com/en/wiki/Linux_Performance_Measurements_using_vmstat Linux Performance Measurements using vmstat]
-[http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried CPU Steal Time]
+[https://web.archive.org/web/20180325093837/http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried CPU Steal Time]
 [https://aws.amazon.com/blogs/aws/choosing-the-right-ec2-instance-type-for-your-application/ Choosing the Right EC2 Instance Type]
 [https://developers.google.com/speed/pagespeed/insights/ Google PageSpeed Insights]

@@ Line 184: / Line 184: @@
 *JavaScript
 **Visualizing Client-Side JavaScript Performance [https://developers.google.com/web/tools/chrome-devtools/profile/rendering-tools/js-execution] [https://developer.mozilla.org/en-US/docs/Tools/Performance/Call_Tree] [http://www.smashingmagazine.com/2012/06/javascript-profiling-chrome-developer-tools/]
-** Node.js Profiling
+** Node.js Profiling [https://nodejs.org/en/docs/guides/simple-profiling/]
 == Additional Performance Evaluation Resources ==

@@ Line 184: / Line 184: @@
 *JavaScript
 **Visualizing Client-Side JavaScript Performance [https://developers.google.com/web/tools/chrome-devtools/profile/rendering-tools/js-execution] [https://developer.mozilla.org/en-US/docs/Tools/Performance/Call_Tree] [http://www.smashingmagazine.com/2012/06/javascript-profiling-chrome-developer-tools/]
-** Node.js Profiling [http://www.willvillanueva.com/the-node-js-profiling-guide-that-hasnt-existed-profiling-node-js-applications-part-1/ Profiling Node.js] [https://strongloop.com/strongblog/node-js-performance-tip-cpu-profiler/]
+** Node.js Profiling
 == Additional Performance Evaluation Resources ==

← Older revision		Revision as of 01:00, 18 November 2015
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	[https://aws.amazon.com/blogs/aws/choosing-the-right-ec2-instance-type-for-your-application/ Choosing the Right EC2 Instance Type]		[https://aws.amazon.com/blogs/aws/choosing-the-right-ec2-instance-type-for-your-application/ Choosing the Right EC2 Instance Type]
		+
		+	[https://developers.google.com/speed/pagespeed/insights/ Google PageSpeed Insights]

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-Learning how to evaluate the performance of your operating system is critical to scaling up your web services to a large number of users. This article will discuss a few tools that will help you with evaluating the performance of your Linux server and web applications.
+Learning how to evaluate the performance of your system is critical to scaling up your web services to a large number of users. This article will discuss a few tools that will help you with evaluating the performance of your Linux server and web applications.
 == Linux Command Line Tools ==
-The Linux command line offers an excellent set of tools to help you monitor the performance of your server.  When evaluating the performance of your web application you need to understand the impact your application has on the server you've deployed it on.  It is important to understand where a potential bottleneck exists for your application and the tools listed below will help you quickly gain insight into the problem.
+The Linux command line offers an excellent set of tools to help you monitor the performance of your server.  When evaluating the performance of your web application you need to understand the impact your application has on the server you've deployed it on.  It is important to understand where a potential bottleneck exists for your application.
-The goal is to determine what resources are limiting the performance of my application. There are many different factors that influence an applications performance. A good place to start is to investigate the CPU utilization and IO (disk and network) of your server.  Below are a few examples of two tools to start to dissect performance issues in Linux.
+There are many different factors that influence an applications performance. A good place to start is to investigate the CPU utilization and IO (disk and network) of your server.  Below are a few examples of tools to start to dissect performance issues in Linux.
 === top ===
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 ** wa: Time spent waiting for IO. Prior to Linux 2.5.41, included in idle.
 ** st: Time stolen from a virtual machine.
 === Additional System Tools ===
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 From the tests, we see that Apache is able to serve 90 requests per second to the machine running the ab tool. We also have statistics on the min, mean, median, and max time to send a request.
-In order to effectively measure the performance of your server we should execute the ab tool from a separate machine. The ab tool can utilize a decent amount of CPU and that may interfere with the results of your web server.
+In order to effectively measure the performance of your server we should execute the ab tool from a separate machine. The ab tool can utilize a decent amount of CPU, which may interfere with the performance of your web server.
 ==== Using ab in AWS ====
-When using ab in AWS with multiple instances, we should take advantage of Amazon's Virtual Private Cloud (VPC) [https://aws.amazon.com/vpc/getting-started/ VPC]. You actually have a VPC setup by default and to communicate with other instances, you simply use the private IP address assigned to it. Each instance by default will have a public IP address (which you ssh into) and the private IP address that is only accessible from inside the VPC.  When load testing your server on AWS you should always use the VPC, to avoid contention from other networks.
+When using ab in AWS with multiple instances, we should take advantage of Amazon's Virtual Private Cloud (VPC) [https://aws.amazon.com/vpc/getting-started/ VPC]. You actually have a VPC setup by default and to communicate with other instances, you simply use the private IP address assigned to it. Each instance by default will have a public IP address (which you ssh into) and the private IP address that is only accessible from inside the VPC.  When load testing your server on AWS you should always communicate with the private IP address of your server, to avoid contention from other networks.
 === Additional Application Testing Tools ===