The load-testing tag is for issues relating to the setting up or running of load tests.

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45
votes
3answers
6k views

How do you do load testing and capacity planning for web sites?

This is a canonical question about capacity planning for web sites. Related: Can you help me with my capacity planning? How do you do Load Testing and Capacity Planning for ...
35
votes
11answers
20k views

Tools for load-testing HTTP servers?

I've had to load test HTTP servers/web applications a few times, and each time I've been underwhelmed by the quality of tools I've been able to find. So, when you're load testing a HTTP server, what ...
31
votes
7answers
38k views

How can I monitor hard disk load on linux

Is there a good command line utility to monitor hard disk load on linux? Something like top but then monitoring disk activity i.s.o. cpu usage. More specifically, I suspect that for some (heavy load) ...
17
votes
1answer
2k views

How do you do load testing and capacity planning for databases?

This is a canonical question about capacity planning for databases. Related: Can you help me with my capacity planning? How do you do Load Testing and Capacity Planning for Web ...
14
votes
5answers
21k views

How many requests should my webserver be able to handle?

Not going into specifics on the specs since I know there is no real answer for this. But I've been doing load testing today with the ab command in apache. And got to the number of 70 requests per ...
6
votes
4answers
5k views

How can I replay Apache access logs back at my servers to do real world load testing?

I looked at http://serverfault.com/questions/2107/tools-for-load-testing-http-servers but I couldn't see how to replay my own existing logs in any of those tools. I have a bug that only occurs under ...
5
votes
4answers
13k views

How to generate CPU load on Linux server

I would like to test fake load on the server, I'm looking for some burn-in or benchmark command line utility that would generate CPU load on the system. I would like to be able to burn-in only CPU ...
5
votes
1answer
1k views

Load-testing tools for Active Directory?

Are there any tools out there that can torture-test and measure AD performance? We're looking at a fairly major expansion of our environment (think tens of thousands of computers) that will throw lots ...
5
votes
3answers
652 views

Virtualbox HTTP load testing, host CPU overload issues

I'm doing HTTP load testing benchmarks (using Apache Benchmark and Siege) on a small Java EE 1.7.0 / Tomcat 7.0.26 application running on a Debian Squeeze 6.0.4 x64 virtualized with Virtualbox 4.1.8. ...
4
votes
1answer
149 views

How can I safely estimate the max # of users based on a load test measurement like max hits/second?

In my specific case, I am working with websites, however the question is more general than that. What I’m looking for (I think) is something like a formula. The situation is that I’ve already done ...
3
votes
5answers
991 views

Stress testing a hosted IIS server

I have a hosted environment that is migrating to some new hardware. I need to stress this new implementation remotely. Is there a quick and clean way to do this? I don't need anything fancy, just ...
3
votes
3answers
1k views

Load testing sites behind an EC2 load balancer with ApacheBench

When ever I try to load test a site that is load balanced on EC2 I get the following message: ab -n 20 -c 20 http://www.somesite.com/ Benchmarking www.somesite.com (be patient)...Send request ...
3
votes
1answer
179 views

Why are 32-bit application pools more efficient in IIS? [closed]

I've been running load tests with two different ASP.NET web applications in IIS. The tests are run with 5,10,25, and 250 user agents. Tested on a box with 8 GB RAM, Windows 7 Ultimate x64. The same ...
3
votes
3answers
592 views

Apache/Tomcat Parameters

I have a Medium server on EC2. I don't know that much about Apache or Tomcat - they are up and running, but other than that I don't have advanced knowledge of how to tinker. I know that I can set the ...
3
votes
2answers
1k views

Nginx / uWsgi / Django site can handle more traffic with rewrite URL

I'm running a Django app, using uWsgi behind Nginx. I've been doing some performance tuning and load testing using ApacheBench and have discovered something unexpected which I wonder if someone could ...
3
votes
1answer
1k views

Tips for benchmarking and load testing web server?

I'm trying to benchmark and load test various web server setups (mod_php vs php as fastcgi, max/min worker/thread configuration, and so on). I'm starting with ab, but would be interested in other ...
3
votes
1answer
810 views

Tools for load-testing a videoserver

I'm looking for a tool capable of setting up multiple RTSP streaming sessions and keeping them alive for a configurable amount of time. Ideally this should not be videoserver specific and as ...
2
votes
3answers
678 views

How do you know what number of page views per second is an acceptable amount for your server?

Apache's AB tool allows us to test our server to see how many pages per second a server can handle. The results are obviously is going to vary based on the specs of the server hardware and software ...
2
votes
3answers
489 views

Is there a service that simulates high traffic using data from log files?

I need to test a saas service load by sending 1000s requests/sec from multiple remote sources. The urls need to be from my access log. Is there a service that does that?
2
votes
4answers
5k views

MySQL load/stress testing

I am going to do load testing on mysql server, could someone recommend good metrics to concentrate on? Any automated way(read software) of getting/tracking them? Thank you!
2
votes
4answers
1k views

Linux testing - CPU & disk

I am a bit rusty lately. What is the standard way to test CPU and disk I/O these days?
2
votes
2answers
84 views

When load testing, is network 'distance' a factor?

I have a server application running on EC2 behind a Elastic Load Balancer. I have tested this using Blazemeter - a jMeter based load testing service that also runs on EC2 based infrastructure. The ...
2
votes
3answers
713 views

stress test video streaming [closed]

is there a way to stress test video streaming? Basically simulating a high number of people simultaneously streaming a video? This is an amazon 'cloud' service that will be enabled for my site.
2
votes
2answers
1k views

Coldfusion 8 Application Crashes Under Heavy Load

We have a CF8 app that runs for 20-25 minutes before crashing under heavy load ~ 1200 users. This load is generated by our load testing tool: 1200 users ramped up in 5 mins (approx behavior of our ...
2
votes
1answer
428 views

How to interpret ab result?

I am using ab to load test my server. As I increase the concurrency number from 1, the requests per sec. goes up. I also see time per request (mean) goes up, while time per request (mean across all ...
2
votes
2answers
3k views

Throttle down CPU speed of VMWare image

Is it possible to throttle down the CPU speed of a VMWare image so that i can simulate a slow computer and test how my software works on a slow machine? Or is there any other way to do this? Im using ...
2
votes
2answers
315 views

CPU, Memory, Network, IO resources are under utilized when I tried various JMeter load testing

I am trying to assess the performance of my web server which has Linux and Apache. I tried load testing using JMeter, and gradually increased the number of requests and recorded the response time as ...
2
votes
2answers
610 views

Automated Load/Stress testing via a continuous integration server

My company currently has stress tests that are run manually through JMeter. We also use TeamCity for automation of JUnit testing. It's become clear that we need to automate our stress testing as well ...
2
votes
1answer
1k views

Inefficient CPU usage by Tomcat

I am using tomcat to convert pdf to png. I was using Jmeter to load/throughput test the app using a Intel(R) Xeon(R) CPU X5550 @ 2.67GHz server which has 16 hyper-threaded cores. Tomcat6 had 2gigs of ...
2
votes
2answers
208 views

Globally-distributed load testing service providers

We are looking for a third-party service providers to load-test our website infrastructure, preferably across multiple geos. Any recommendations? We have done internal load testing with Load Runner ...
2
votes
2answers
353 views

Does mysql connection error count ever flush or will the host eventually get blocked?

During performance testing of our application I found that under extreme loads one problem that can occur is the occasional mysql connection error (i.e. at this stage I don't believe it is fair to ...
2
votes
1answer
178 views

ab Failed Requests

I've built a simple apache + django + mod_wsgi webapp that I am testing on my local machine. I've started load testing it using ab - and I am seeing a few failed requests. ab -n 500 -c 100 ...
2
votes
1answer
273 views

Recommendations for Java Web Server [closed]

I am currently using DBCP for connection pooling since it is more or less provided with tomcat and easy to setup. I am thinking about migrating to Glassfish or Jetty and haven't yet determined which ...
1
vote
1answer
443 views

How to Benchmark an x86 Router?

How would one go about objectively benchmarking different x86 server for their potential as x86 routers? One idea I had is to setup two subnets, 10.0.0.0/24 and 10.0.1.0/24, on opposite sides of a ...
1
vote
2answers
654 views

Stress Testing / Load Testing Proxy services / web servers

What are the best load testing tools for stress testing web servers and proxy services such as NAT. Some metrics to consider include throughput. hits per second. machine load.
1
vote
4answers
453 views

Stress test a server for simultaneous connection

I am trying to figure out a practical way to stress test a server for 300 to 600 simultaneous connections. Any advice? Thank you everyone for the help. To be more specific (sorry I wasn't before) ...
1
vote
7answers
462 views

Can anyone please recommend any good Load Testing software? [closed]

Can anyone please recommend any good Load Testing software? I have a website which updates scores every minute via ajax calls and need a load testing software which supports ajax calls (javascript) ...
1
vote
3answers
299 views

Network load tester app

I'm looking for an app that I can run to test available bandwidth (and error rate) over a LAN. I'm thinking of a pair of programs that run on two computers and send a big known block of data from one ...
1
vote
2answers
1k views

Can I simulate concurrent wireless connections for load testing?

Our office internet typically has about 25-30 computers connected. For an upcoming event, we will have to support about 100 connections, mostly via wireless, for a few days. I'd really like to test ...
1
vote
2answers
42 views

How to limit disk performance?

I am load-testing a web application and studying the impact of some config tweaks (related to disk i/o) on the overall app performance, i.e. the amount of users that can be handled simultaneously. ...
1
vote
1answer
124 views

Monitoring “Request Wait Time” in PerfMon

A website I'm load testing is adding requests to the iis request queue. I can see the queue size getting bigger using the relevant performance counter: \ASP.NET\Requests Queued However I'm trying ...
1
vote
2answers
1k views

How to determine approximate maximum number of requests?

I'm building a quite simple web application, and need to get some rough understanding of how much load my server can take. Of course, this depends on a whole lot of factors, but I just need a rough ...
1
vote
2answers
1k views

How to calculate server bandwidth / load estimates?

What's either a good rule of thumb or a method to estimate load on a Windows server for a php application? How do I estimate bandwidth required for 1000 users on the site, or 10,000?
1
vote
2answers
819 views

mass mail/load test/newsletter from Domino/Lotus Notes system

I need to generate a few thousand mails in Lotus Notes (with attachment) in order to test an extension to the Domino router I wrote. How can I do that? It may not be mails that are send into Domino ...
1
vote
1answer
150 views

Continuous hits to the server with Jmeter

I have 100 threads in JMeter which I want to hit a server 12 times in a loop. But each time 100 threads will run and pause for 5 seconds and then resume hitting the servers for next 100 times. Here ...
1
vote
1answer
186 views

Test PHP script load on Debian server

Anyone maybe know is there Linux (debian) tool for testing PHP application performance? I want to check in witch places my PHP/MySQL script need optimization.
1
vote
1answer
206 views

Tool to replay access.log files with cookies?

Is there any tool that will replay combined access.log-style (or any other format) files back and preserve the cookies? We need to load test our application with real user accesses but we really need ...
1
vote
3answers
614 views

Is there any way to test how many users an application can handle? [duplicate]

Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I am developing an PHP MYSQL application running on a Linux server I was wondering whether there is any ...
1
vote
1answer
730 views

How can I Load Test an application that lives on a terminal server

I have an application that lives on a Windows 2008 Terminal Server. Is there a way I can simulate a bunch of users, 100 for example, logging into the server, and then launching an executable? The ...
1
vote
0answers
35 views

emulate shared hosting load

I want to emulate some shared-hosting activity in testing environment. Is particularly interested I/O performance. Need to emulate: many sql queries, http queries, and some additional activity, ...