Classic strategy is the following things :) Proc::Background, Highlander: one instance at a time (Oct 00), Watching long processes through CGI (Aug 02) , Throttling your web server (Oct 00), Slow down the download! (Jan 98)

Also avoid shell interpolation

In reply to Re: How to sleep(), or use a while() in the background? by Anonymous Monk
in thread How to sleep(), or use a while() in the background? by taint

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