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

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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... ...
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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, ...
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147 views

Load testing HTTPS with Siege (open auth)

I am trying to load test our new website with siege. It is currently behind basic auth. I have edited my .siegerc file to include the right username and password (I've checked many times that it is ...
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0answers
47 views

How do I interpret this 'siege' load test results?

I'm performing some stress tests to a server with siege (v3.0.0), and I want to get back the following information: Number of requests that returned a status code < 400 Number of requests that ...
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2answers
55 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 ...
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1answer
81 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 ...
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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. ...
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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 ...
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1answer
168 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 ...
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1answer
44 views

Load Testing a Security/Gateway Appliance

In a couple weeks I will load testing a security/gateway appliance. We're a small residential college, and that "residential" means the traffic moving through the appliance is a bit like the Wild ...
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53 views

IIS7 app pool remains 'locked' after heavy load returns to normal

I've got a Windows Server 2008 R2 set up, happily running a bunchof PHP / MySQL websites. Plenty of resources, no problems at all. Following a request from a client, I've started doing some load ...
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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 ...
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2answers
973 views

How to test a site with multiple concurrent users from various IPs (load test)?

I need to test a site and how it handles several connections simultaneously. Each user must: Connect from a different IP address Simulate a browsing user --> (open a few pages, click a few buttons) ...
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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 ...
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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 ...
2
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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 ...
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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 ...
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2answers
181 views

Load/stress testing methodology. What to expect and how to interpret results?

We have this new client for whom we're reviewing our server infrastructure. I know pretty well the web API because I've helped building it and now I'm on my own maintaining and pushing it forward, so ...
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1answer
172 views

Load testing nginx inside AWS

I'm trying to load test nginx running on AWS. I need to try to optimise it to handle 1Gbps of inbound traffic. Currently I've got it to peak at 85Mbit/s by running nginx on an m1.large with 4 other ...
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52 views

nginx+mysql5 loadtesting configuration strangeness

i am trying to setup a new server running on debian6 and trying to make it work smooth under load. i ve used a wordpress site as a test object, and tried the configurations on http://blitz.io. when i ...
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0answers
157 views

Stress testing Django app - how to improve throughput?

I'm having my first attempt at stress testing a simple django web app running from gunicorn and nginx which I’ve put on a small 256MB Rackspace Cloud server. Using httperf, I increase the number of ...
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0answers
62 views

Configure SilkPerformer to work with Fiddler

Does anyone know how to capture a Silk Performer HTTP request, using Fiddler? We can't seem to capture this information no matter what we try (it seems like it ignores all proxy settings).
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1answer
71 views

Windows Memory being freed before limit is hit during a load test

I'm running a load test on a .NET web application over a LAN. The server hosting the web app is a VM, Windows Server 2008 R2, with 2 GB of RAM and a 3GB limit for virtual memory. No other web ...
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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 ...
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1answer
244 views

SonicWALL SRA blocks load test as a DoS attack

I am evaluating the Web Application Firewall (WAF) service on a SonicWALL SRA virtual appliance. When I try to load test the protected website, SonicWALL blocks my requests with this error: "Reset ...
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2answers
611 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 ...
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113 views

Performance and Resilience testing DNS servers

We are going to run a DNS server in our company and we want to test it before we allow our users make DNS requests using the server. I want to be able to simulate huge load on the DNS server and I ...
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1answer
127 views

What hardware factors may be considered bottlenecks on a Hyper-V virtual server during load testing? [closed]

Our organization is load testing our application using virtual servers via Hyper-V to see what the user load can be using fair equipment on a single box setup. The developer group questioned the ...
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3answers
653 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. ...
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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 ...
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3answers
825 views

Interpreting SQLIO test results

I've been running a series of load tests on a dedicated DB SAN from a pre-production cluster (Dell R710 connecting to a dedicated RAID10 SAN over 2 gigabit ethernet connections), and I'm not sure if ...
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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 ...
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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 ...
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1answer
104 views

Large amount of traffic incoming. Preparation tips

Looking for any tips on improving performance on the server level as my client will be getting some heavy traffic in the next few days. Using a 1and1 cloud vps and increased the memory pretty high on ...
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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 ...
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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 ...
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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?
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1answer
138 views

how to simulate load on multiple app servers when nginx balances load according to IP

I use httperf from external server to stress test my app (on scalr/EC2). However nginx is configured to distribute load according to IP address of the source (so each app server will receive all the ...
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2answers
96 views

load testing based on access log recording [duplicate]

Possible Duplicate: Tools for load-testing HTTP servers? I need to load test a saas system to find capacity+bottlenecks. My preferred method is to record a few 100,000s or millions of real ...
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2answers
655 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.
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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 ...
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1answer
341 views

How to test HTTP Requests/sec + CPU + RAM usage?

Trying to evaluate the requirements of my Web application, I wanted to put it under load and at the same time check how it scales on memory and CPU. But running AB/HTTPerf and htop/"pidstat -C" in a ...
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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.
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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 ...
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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 ...
0
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1answer
225 views

How to replay access logs in the presence of timing problem?

I'd like to replay the IIS or Tomcat access logs to do load testing. The access logs contain only Get request, so the session data/post data is not a problem here. However two timing problem is ...
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3answers
689 views

How do I check how many users can a server handle before going online? [duplicate]

Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I'm moving a site from shared hosting to a VPS, which I have set up. I've made a change to my hosts file ...
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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) ...
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4answers
115 views

Network testing: looking for any test daemon and client combination to measure firewall load with 500..2000 incoming connections

I need to measure IPTables/inline Snort impact on performance, so need to put my test server under a good load. Unfortunately, no hardware traffic generator is available, thus connections must be ...
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3answers
714 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.