Yes, I'm suggesting that you need to experiment to find the optimum number of simultaneous instances. For running many jobs a fixed number of times, back then I used Run commands in parallel to run the processes. These days I'd probably use Parallel::ForkManager.

There is no general rule to tell what is bottlenecking a process without knowing what it does in detail, or measuring it. A cheap way to get an idea, though, is to run a copy on a lightly loaded machine, and watch top. If your process is taking close to 100% CPU, then it is almost definitely CPU bound. If it is taking significantly less than 100% CPU, then something else is a problem at least some of the time. As a bonus, you also now know about how many copies of the process you can run until you run out of CPU. But you don't know what else is taking up time.

In reply to Re^4: help me fork by tilly
in thread help me fork by mhearse

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