Question

IIS Capacity Very Rough Numbers Needed

Asked by: menreeq

I have to provide very rough maximum capacity numbers for our IIS 6.0 server that runs about 15 website and has a SQL backend running on a separate servers.  Both servers are identical Dell PowerEdge 2950 w/ 4GB of RAM, RAID 5 w/ 15K RPM SAS drives and dual Quad Core CPUs.  These numbers are for a useless survey that we have to fill out... they basically want to know how many Requests per Second the server is capable of and how many simultaneous users can access it before performance is impacted.  I know that the true numbers depend on specific server configuration, code, network, and that they can only be gotten through load testing.  I'm not looking for true numbers, just numbers that are in the ballpark.  Just need:

Typical sequests per second capacity

Maximum concurrent users before performance is impacted

and you'll have the 500 points

Thanks!

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Asked On
2009-09-29 at 11:51:26ID24771180
Tags

IIS Capacity

,

requests per second Maximum Concurrent Users

Topic

Microsoft IIS Web Server

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: sqlrocksPosted on 2009-09-29 at 20:19:12ID: 25455423

Wow... This will just be a ballpark guess since like you pointed out performance depends on so many factors, application design being #1.

Best answer would be to stress test with something like the web application stress tool and see what it's capable of.

If that can't be done I'll just give you a guess based on my experience with similar hardware.

We hosted radio websites and got about 120 asp and asp.net pages per second. There were other static objects and so total http requests/s peaked about 1200.

We had about 10k live users on a server at the same time (20 minute session timeout)

perrformance was slow when it was at it's peak, so I added capacity until the servers were about 60% busy during peak times of the day.

hope that helps!!!

 

by: menreeqPosted on 2009-09-30 at 11:26:03ID: 25461767

wow, finally someone w/ some courage! :)  Thanks, so this was on a single server, right?  What kind of hardware?

 

by: sqlrocksPosted on 2009-09-30 at 11:36:58ID: 25461883

Dell 2950s with Dual 3Ghz Xeons. 4GB of RAM for IIS, 16GB for SQL.


Windows 2003, IIS6 and SQL 2005



20120131-EE-VQP-002

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