Failed requests by length in my ApacheBench load test result
Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers , Stack Overflow help chat ,Run ab with the -v 2 parameter, meaning verbosity level 2. This will dump the response headers. If your requests are not using chunked encoding, you will see a "Content-Length" header indicating the size of each response.,Thanks for contributing an answer to Stack Overflow!
ab with the
-v 2 parameter, meaning verbosity level 2. This will dump the response headers. If your requests are not using chunked encoding, you will see a "Content-Length" header indicating the size of each response.
gw: ~$ ab - n 1 - v 2 "http://whatever.com/" ... LOG: header received: HTTP / 1.0 200 OK ... Content - Length: 1568399
Nevermind. The "length failure" merely indicates that about half the time the length of the response was different.,Since the contents are dynamic, it's probably the session identifier or something like that.,The apache benchmarking tool (ab) assumes that length of response content will be the same during entire test. It stores the content length of the first response. If any of further responses have different content length, they result in "length failures".,Summary: If you are serving any content of variable length, you should probably ignore this kind of ab request failures.
Edit: I have recently noticed that the
ab command has a new (at least for me) option:
-l Accept variable document length(use this for dynamic pages)
Request latency metrics,endwrite: when ab finished writing the request,If you set a -c value greater than 1, the second Time per request metric should (in theory) provide a more accurate assessment of how long each request takes.,From there, use the higher-granularity aggregated connection times to find out which part(s) of the request-response cycle to investigate further.
apt - get update apt - get install - y apache2 - utils
Load Testing with AB … fake failed requests (length),While benchmarking the site, try to see how many connections are established in port 80:,Repeat this command a couple of times while benchmarking the site. Probably you'll be hitting 50 established connections.,Connect and share knowledge within a single location that is structured and easy to search.
While benchmarking the site, try to see how many connections are established in port 80:
netstat - tnap | grep ":80" | grep - c ESTA
As I mentioned, you can also use Apache Bench to run other types of tests under the “Performance Testing” umbrella.,If you want to learn more about Okta and software development in general, check out some of our other awesome content!,If you have access to a Mac or Linux system, chances are you already have Apache Bench installed as a program called ab. Run a simple load test with:,The last block is pretty self-explanatory. It breaks down the requests by time, letting you know that 50% of the requests finished in 148 milliseconds, 66% were done by 225 milliseconds, and so on down to the longest request time of 993 milliseconds.
ab - n 100 - c 10 https: //google.com/
When you use ab to do some performance benchmarking, you might run into output like this:,Note that in our example these "Failed requests" actually never failed.\ For some requests, the application just returned a response with a different content length than the first response. This is indicated by the "Length: 5" bit in the example above.,If you see requests that failed with other kinds of errors, they probably failed for real., By refactoring problematic code and creating automated tests, makandra can vastly improve the maintainability of your Rails application.
When you use
ab to do some performance benchmarking, you might run into output like this:
CopyComplete requests: 200 Failed requests: 5(Connect: 0, Receive: 0, Length: 5, Exceptions: 0)
There are various statically declared buffers of fixed length. Combined with the lazy parsing of the command line arguments, the response headers from the server and other external inputs, this might bite you.,The following list describes the values returned by ab: ,ab is a tool for benchmarking your Apache Hypertext Transfer Protocol (HTTP) server. It is designed to give you an impression of how your current Apache installation performs. This especially shows you how many requests per second your Apache installation is capable of serving.,Copyright 2021 The Apache Software Foundation.Licensed under the Apache License, Version 2.0.
ab is a tool for benchmarking your Apache Hypertext
Transfer Protocol (HTTP) server. It is designed to give you an impression
of how your current Apache installation performs. This especially shows
you how many requests per second your Apache installation is capable of
Requests per second − This is the number of requests per second. This value is the result of dividing the number of requests by the total time taken.,Apache Bench - Quick Guide,Concurrency level should be lower than the total number of requests.,Concurrency Level − This is the number of concurrent clients (equivalent to web browsers) used during the test.
Step 1 − Update package database.
# apt - get update
In the above output, Apache will display key metrics such as Time taken for tests, No. of requests completed, Failed requests, Total data transferred, HTML transferred, Requests per second, Time Per Request, Transfer rate.,After Apache bench runs the tests, it will produce an output like the following.,Here are the steps to install and use Apache bench for load testing.,Hopefully, this article will help you set up and run load testing for Apache web server. Ubiq makes it easy to visualize data, and monitor them in real-time dashboards. Try Ubiq for free.
$ sudo apt - get update $ sudo apt - get install - y apache2 - utils
3 How to Use Apache Bench for Load Testing? , 10 Apache Bench Usage Example for Google Load Test , 9 Apache Bench Usage Example for Twitter Load Test , 8 Apache Bench Usage Example for Facebook Load Test
To download the Apache Benchmark with “apt-get” command, you can use the example below.
apt - get install apache2 - utils
Other "result-requests" queries related to "Failed requests by length in my ApacheBench load test result"
- TypeError: Cannot read property 'length' of null in React Project
- Change timeout length based on state
- How can I use axios to make get requests and store the result object to a variable [duplicate]
- Module build failed: Error: ENOENT: no such file or directory - React
- Yarn Build not working, The build failed because the process exited too early
- React usestate array length varies depending on item i click
- On React, how do fix Error: <svg> attribute width: Unexpected end of attribute. Expected length, “”
- Redux-persist failed to create sync storage. failing back to noop storage. What does this mean?
- Error: Compiling RuleSet failed: Query arguments on 'loader' has been removed in favor of the 'options' property
- Reactstrap tooltip: Cannot set dynamic id and target: SyntaxError: Failed to execute 'querySelectorAll' on 'Document': '5f54e5d61ec2c635f81f0e6a'
- React - Recoil async requests
- DevTools failed to load SourceMap: Could not parse content for file
- Array list is shown, array length is 0 and elements are undefined in react
- Push rejected, failed to compile Node.js app in Reactjs on Heroku
- Vercel Next js Uncaught (in promise) ChunkLoadError: Loading chunk 0 failed
- How to rollback redux state and database if action request failed
- How to queue requests using react/redux?
- React rendering before state set after two axios api get requests
- Trying to use react-leaflet but get Module parse failed error when trying to start the app using localhosdt [duplicate]
- Unable to Deploy Next Js SSR app on AWS amplify. ( Internal error on Website and Deployment failed on cli)
- React Native showing error while making a build in iOS - Build failed The following build commands failed: CompileC
- React axios failed to compile
- Error: Invariant failed: You should not use <Link> outside a <Router> when I try to test my app using localhost
- How to Resolve Failed to load config “prettier” to extend from. in react Js
- Using implode for stdClass Objects in php
- Webpack build fails with Gitlab-CI
- Doctrine2 ManyToMany Self referencing
- Timing attack with PHP
- Read and parse perf.data
- Why does the wc command count one more character than expected?
- How to disable socket creation for a Linux process, for sandboxing?
- How to use AWK regExp to print multiple substring pattern in a excel format in different column
- Why is time.clock giving a greater elapsed time than time.time?
- PHP abstract properties
- Python memory consumption on Linux: physical and virtual memory are growing while the heap size remains the same
- How to share a Symfony2 model with several projects
- How to extract one column from multiple files, and paste those columns into one file?
- "Command not found" piping a variable to cut when output stored in a variable [duplicate]
- PDO lastInsertId() always return 0
- Magento 2 goes terribly slow (Developer mode)
- How to make "php -S" to work on local network?
- PHP: how to know if output already started?
- Can't Hard Link the gitconfig File
- Nginx / PHP FPM graceful stop (SIGQUIT): not so graceful