how many whois requests does it take to pull down a server

Hey guys, I once wrote a whois cgi script...very fun, would get Overture's keyword suggestions and then do whois lookups on them. So each call would generate up to 100 whois requests.

Then I posted a link to it on a high volume board and brought down my host for 20 minutes...ugh!

So anyway, I am still curious what is the upper limit of whois requests before you bomb the server...any ideas?

TIA

 

 

 

 

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