How to decide the number of users to run in a...

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Saravanan Srinivasan

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How to decide the number of users to run in a server?
 
Did you mean to say number of users to run on a load generator?
 
And also how to decide from the windows server configuration
 
Ravi bro i need some about sitescope pls give me some document if it is available by you
 
it is virtually impossible to tell u how to figure out the users for a load generator. you can allocate 4 mb per user but leave 1gb RAM for OS. So if you have 2GB RAM in your LG then you can run 2500 web users. if it is for other protocols you can run staggered ramp up of users like 10 users every 1 min for an hour or 2 and see how the LG holds the load. Saravanan Srinivasan
 
Thanks Vinodh Kumar for your valuable feedback.. the user load on a LG(Load Generator) is depended on the protocol and some other factors too like the number of lines in a script, think time, pacing, string manipulation or calculations.... Run the script with single user for 15-20 minutes, check "MDRV" it will give you an idea of memory utilizatiion, run "perfmon" to check the CPU utilization, you will get a rough estimation of number of users a load generator can handle. In short web protocols: 4-5 MB/ user SAP GUI, Citrix, Ajax True client: 50-60MB/user
 
Thanks Ravi Ranjan :) if the server configuration is quad core 12gb ram , how many users we can run for http protocol
 
check how much RAM is utilized by your system(OS) suppose your system chews 2 GB of RAM then the available RAM will be 10 GB. Total available RAM in MB= 10*1024= 10240 MB RAM utilization by 1 user=5 MB # of Vusers= 10240/5= 2048 Around 2048 users will be supported by the system(Its a rough calculation the exact # may vary).
 
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