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

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-1
votes
1answer
19 views

Record and replay HTTP requests/posts between a given period of time (Apache)

Disclaimer: I know that what I'm about to ask is not even close to best practices but due to very specific requirements, I see this as probably one of very few solutions. Context: We wish to ...
6
votes
5answers
8k 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 ...
1
vote
1answer
1k views

How to get what IP Address Ranges used by Visual Studio Online Load Testing Agents?

I need to setup IP Whitelisting in an environment that I need to run some Visual Studio Online Load Tests on. I was able to find some documentation as to what IP Addresses Visual Studio Online ...
-1
votes
0answers
11 views

What are the major factor that affect a Moodle installation's performance? [duplicate]

How can we assess the performance of a Moodle installation, in terms of Memory, Computing Power needed. Is a VPS or dedicated hosting necessary to Run Moodle. The particular Moodle installation ...
81
votes
5answers
30k 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 ...
6
votes
2answers
226 views

Odd performance fluctation with php-fpm and nginx

I'm running a load test against a web service. It's a php application running on php-fpm and nginx, with fastcgi. There is a MySQL backend being used for small reads only. Invariably, I'm seeing a ...
1
vote
0answers
115 views

Identifying bottleneck with nginx VPS load testing

I'm trying to optimize a Digital Ocean droplet (512mb), testing using loader.io I'm testing on my homepage, which is HTTPS / PHP. I setup FastCGI page cache, which got me from 100 req/sec to 2,000 ...
0
votes
0answers
28 views

Server Specs for browser game that hugs cpu

Our team have developed a web browser game, our servers are using nginx and php-fpm to host the website. the game consist of two parts an api and the game itself. both applications reside on its own ...
0
votes
0answers
17 views

same page, different load time on different server

I am completely new to server admin. I have built a large site (for one person to code) and have to do things myself. I have a site on a shared server and another on a managed VPS. The VPS server ...
4
votes
1answer
118 views

Load testing at 350,000 requests per minute [closed]

I need a way to reproduce the sudden burst of traffic our site experienced a while ago, to have a chance to keep our stack working. Our load balancer reported at a certain point that some 350k ...
12
votes
6answers
23k 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 ...
0
votes
0answers
23 views

IIS load test always fails no matter what

The scenario is very simple. An android apk file is served by IIS as a static content with application/vnd.android.package-archive as its MIME type. And it's located in the root of the website, for ...
0
votes
0answers
17 views

Simulate N users hitting a site within N seconds, with Siege?

I want to use siege to test what happens when 2,000 users hit the front page of my site within 30 seconds. This is what I've got right now: siege -c2000 -t30s -b myurl.com Is this correct? I can ...
-2
votes
1answer
28 views

Do routers and networks have have a “max threads” configuration? [closed]

I've been stress testing my application now and I've identified a high average network connection time. This is odd because I haven't gone over the max bandwith at all. What can this be caused by? ...
0
votes
1answer
35 views

Server monitoring software that will show each cpu seperatley [duplicate]

We have been using New Relic to monitor our server load but it aggregates all of the CPUs into one measure. Is there a good tool that is similar but will show individual CPU load?
0
votes
0answers
18 views

Connection vs request in httperf

What is the difference between # of connections and # of requests as shown in the httperf results? My understanding is that HTTP requests are stateless, so that each request would require a separate ...
0
votes
0answers
78 views

Concurrent POST requests using httperf

I am trying to stress test a server using httperf by sending multiple concurrent (say 1000) POST requests (with contents) at a specific rate per second (say 100). Is this the correct command: httperf ...
0
votes
1answer
122 views

Are there any products to replay IIS Logs files for load testing?

I would like to take log files from IIS and import them into a tool. Then in that tool I would like it to generate a load testing script that includes all the requests and the timing of the requests. ...
2
votes
2answers
6k views

HAProxy configuration for RabbitMQ

I have an API that sends messages to RabbitMQ. I have a high availability RabbitMQ cluster behind HAProxy. When I load test my API I start seeing lots of this: Recovering from a network failure... ...
1
vote
0answers
73 views

how to configure http request pipeling using wrk?

I am trying to load test nodejs helloworld, which is running on system 1 at http://10.20.10.10:5000 and I want to pipeline http requests from system 2. wrk takes a script as a parameter. I am ...
1
vote
1answer
96 views

Trying to estimate concurrent connections on my server - is this the right approach?

My goal is to find out, roughly, how many apache2 connections my server can handle at one time. I've gone through all of my running processes, including the apache2 processes, and figure that of the ...
-1
votes
2answers
70 views

Has anyone done a load test on AWS free tier? What is the crash point? [closed]

I think the capacity of AWS EC2 t2.micro instance is too low. I was sending somewhere around 100 mails to the customers and we had some 20+ users online. And the instance crashed. I had to restart it ...
1
vote
1answer
243 views

Jmeter distributed testing over ssh tunnel

While configuring jmeter distributed testing i faced a problem of remote connection to servers which are behind NAT. Node with jmeter client has external ip, all servers are in different LANs behind ...
2
votes
3answers
2k 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 ...
3
votes
3answers
936 views

Simulate 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 can simulate high traffic using the ...
0
votes
1answer
216 views

haproxy-varnish can't reach 6k requests

Issue I can't reach 6k requests/seconds. I get a lot of timeouts. My response time goes as high as 26 seconds. Intro I am setting up a server that will host a 100MB static-website. The thing is ...
0
votes
0answers
32 views

NGNIX limit_per_ip best for 100-200 users from same IP

so i am setting up a web server running ngnix and have it all nice and running, however after some load testing i have noticed a lot of requests are getting 503 errors due to the limits set by ngnix ...
6
votes
0answers
487 views

nginx - connect() failed upstream under load testing

I've been doing some load testing with wrk of my nginx reverse proxy -> my web app setup and I noticed that when I get to 1000+ concurrent connections, nginx starts returning 502s and the following ...
-3
votes
1answer
90 views

How to artificially open many tcp connection on a host (testing)? [closed]

I'm trying to build a test setup which test my server's performance under high load. In order to do that I want to open thousands of tcp connection. The problem is that I only have two hosts, one is ...
56
votes
8answers
86k 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) ...
0
votes
1answer
702 views

Http proxy server performance analyzing

I have implemented a http proxy client/server. Currently I intended to test performance of this proxy client/server. Can anybody tell me what kind of tests should I take to analyze it's performance? ...
0
votes
0answers
89 views

Bad ping results while testing 6000 TCP clients with 18 mbytes/s total traffic on Windows Web Server 2008

The clients are running on the machine #1. The server is installed on the machine #2. The machines have a gigabit connection through a switch on their private vlan. There are no errors in the switch ...
3
votes
1answer
46 views

Architecting for Load Testing

I'm trying to architect a set of web and database servers so that we can load test them. I'm running into some problems given the constraints I have to work with: We can't load test against ...
0
votes
2answers
553 views

Tuning high-raffic nginx and wordpress server

I have been conducting load-tests (via blitz.io) as I attempt to tune server performance on a pool of servers running php 5.5, wordpress 3.9.1, and nginx 1.6.2. My confusion arises when I overload a ...
2
votes
3answers
2k 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 ...
0
votes
2answers
421 views

Tools for replaying _all_ HTTP traffic [closed]

I intend to log all production HTTP requests to be able to do load testing and analysis on that data later on. The log replaying software I have seen so far only seem capable of replaying GETs. Are ...
0
votes
1answer
235 views

How do I interpret this Load Test result?

We used BlazeMeter to evaluate our site's capability to handle load. I set up a simple script that logs in (using a special page which ensures each load test user has a different account), visits ...
0
votes
0answers
143 views

stress testing a QOS switch

I need to test a network Switch that has QOS capabilities. I need to simulate a large network (preferably up to or exceeding 100 devices), and I need to do it as a live test. My requirements are: • ...
2
votes
1answer
617 views

High Mysql Connections

Having a challenge discovering why results are as they are. Perhaps missing something obvious. Sorry this isn't very specific. But if anyone has an pointers on areas to focus on that would be very ...
1
vote
1answer
189 views

Increase bandwidth per connection on a server

Requirement: I am load testing Rabbit MQ by generating a large number of requests/sec to the server (Server config: 8 core, 16GB). To achieve the above, I am generating load from a client machine at ...
2
votes
1answer
804 views

HAProxy max out at ~10,700 connections

I am stress testing ejabberd with Tsung. My EC2 instances setup as follows: Tsung : c3.xlarge ejabberd : c3.2xlarge HAProxy : t1.mirco When I let Tsung talk to the ejabberd instance directly, I ...
6
votes
1answer
4k 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 ...
1
vote
1answer
2k 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 ...
0
votes
1answer
188 views

how to benchmark an ubuntu webserver using Jmeter and create a test report.?

I have an ubuntu webserver(LAMP) running a clients website.I have already created a test plan with jmeter, what i would like to know is how would we benchmark the server with Jmter and create a test ...
1
vote
2answers
701 views

Advice for simulating a high load on a web application — realistic httperf parameters

I have already selected httperf as the load testing tool to use. I'm trying to figure out some realistic parameters to use, and if I need to use multiple machines to create more simultaneous ...
1
vote
0answers
64 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, ...
0
votes
2answers
194 views

How long/how hard should I stress test CPU and memory before declaring it OK?

One of our Dell PowerEdge LCDs was showing "CPU 2 machine check error", but I couldn't find anything in the logs regarding MCE or "Hardware Error." I cleared the message, but I wanted to run the ...
0
votes
1answer
261 views

Simple tool to test Amazon EC2 instance throughput?

I'm looking for a way to test the bandwidth throughput of a c3.8xlarge instance. I have two c3.8xlarge instances set up, so I imagine I could use the other to simulate the traffic. What's the ...
1
vote
2answers
62 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. ...
0
votes
1answer
803 views

How can I determine Breaking point of my Web application using JMeter?

How can I determine Breaking point of my Web application using JMeter? I have executed the JMeter Testplan with different concurrent users load. EX. 300 users(0% error), 400 users(7% error in a ...