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Debugging & Fixing High CPU Use On IIS 7 During Load

We just launched our site and are having some trouble with our server getting overloaded.

During periods of low usage, with ~ 25 people actively using our site, the CPU usage on our site wildly fluctuates between 5% and 70% with what I believe to be new requests. But, the requests are filled and that's the most important thing. However, during periods of relative high usage with ~700 people actively using our site, the CPU usage of the app pool thread is 100% constantly. Eventually this ends with the server not responding to any requests unless IIS is restarted.

I'm looking for someone that has knowledge in both .NET web applications, IIS, and web server administration. I have a few preflogs from our last spike in traffic but have been unable to come to a solution. I would like to determine whether this is an application issue with poor coding (and where), a server issue (not powerful enough), or a DDoS attack.

We are expecting another high usage period with ~700 people using our site tomorrow, Thursday, morning at around 10am CST. I think it would be useful though for you to see how the server responds to a low number of requests at a time like tonight.

I am always free on Skype or via phone as this is a very important issue that is keeping our site from delivering content to our visitors.

Please let me know what experience you have in debugging these types of server errors and what your general plan in figuring it out is. We will be hiring someone tonight.

Skills: .NET, C# Programming, IIS, Visual Basic

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About the Employer:
( 4 reviews ) Flower Mound, United States

Project ID: #4688900

16 freelancers are bidding on average $599 for this job

sandeep25101982

Hi .Net windows server and IIS expert here. I have similar expertise. Check private message Thanks

$555 USD in 15 days
(39 Reviews)
6.6
shawnburt

I have done a lot of troubleshooting like this, in most cases for myself :) A lot of the time it becomes and threading issue, where the app is doing some long process that needs to be offloaded to another thread so t More

$750 USD in 3 days
(81 Reviews)
6.3
spcinc

This project interest for me. I can help you. Best Regards.

$773 USD in 7 days
(8 Reviews)
5.7
coderPros

I've been working with .net and managing windows servers for well over a decade now and I have some time starting today to start working on this project. Please see my private message for more pertinent information. Th More

$684 USD in 7 days
(17 Reviews)
5.4
xupiter2012

Hello - I have great experience with ASP.net and IIS, so very much interested in your project. Let's work together. Thanks!

$300 USD in 3 days
(18 Reviews)
4.9
bdprofessional1

We are having rich relevant experience, Please have a look on our portfolio, projects and PMB.

$750 USD in 12 days
(3 Reviews)
4.6
Renjithmac

This is something interesting for me.

$755 USD in 3 days
(6 Reviews)
4.2
krishnadubey

Happy to fix is issued and to code server setting.

$555 USD in 3 days
(12 Reviews)
3.9
selfcharged

expert with IIS

$526 USD in 3 days
(5 Reviews)
2.8
thedee

Hi I've been involved in the same situation for last 1 year. And have been review all aspects to enhance. Good in .net, iis and also sql server. Hope i could help with this issue.

$777 USD in 3 days
(1 Review)
2.7
xealsoft

Hi there.. We are interested to do this project.. Kindly check PM..

$777 USD in 7 days
(2 Reviews)
1.5
SidrahKanwal

Hi, I have 8+ years experience working with II6, II7, IIS8, .Net. I have done such optimizations before. Can you tell what your application is about and what is involved in processing request (DB calls, disk read/write More

$666 USD in 5 days
(0 Reviews)
0.0
LightITGroup

Hello! We're interested in taking up your project. We'll contact you shortly with additional questions on the project. Thank you!

$555 USD in 6 days
(1 Review)
0.0
mailfromsaurabh

I am new to freelancing. If you have little time , I can have look to possible solution. I might need access to server to see things, if possible. Dont worry about your data, I wont touch it, may be I will share scree More

$277 USD in 4 days
(0 Reviews)
0.0
tanujchugh

hi, please check pmb for further details. thanks

$277 USD in 2 days
(0 Reviews)
0.0
tiendungtlu2004

I have got 8 years on c#, IIS. Let me do it for you.

$555 USD in 3 days
(0 Reviews)
0.0
reisn

Hi, FYI i've got 2 years on troubleshooting in all kind of servers (IIS, Fileservers, DHCP, DNS, WEBSERVERS, APPLICATION SERVERS, ETC) and 5 years in tech support.

$688 USD in 5 days
(0 Reviews)
0.0
Systenics

We have worked with several large ASP.NET Applications deployed in IIS as well as performed performance tuning based on load. Please check PMB for more info.

$666 USD in 7 days
(0 Reviews)
0.0