Hi guys,

I'm using Perl Parallel::ForkManager module to speed up my program. I set the number of max processes to be 5. I'm pretty sure I write my code correctly because I've been using ForkManager a few times before. Everything else worked fine, except when one or more of the child processes need to make a system call to mv or touch files, it often fails with "cannot allocate memory" error. This seems quite random. When I rerun it, it could succeed (but could fail again too). The file it's trying to create or move is not big at all (<<100kb).

Did some research and seems like using "exec" could solve this because "system" creates a new child process while "exec" does not. However, in my case, I still have a lot of Perl code to run after the "system"/"exec" line, and "exec" will never return and run the rest Perl code if it succeeds. So "exec" does not work for me.

Anyone has any idea why I got this error and how I could fix it?

Thanks a lot!!!

Best,

Fei

In reply to "Cannot allocate memory" when making system calls using Perl Parallel::ForkManager by feiiiiiiiiiii

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