Hello, we have an application, which loads alot of data (1.5G) in the beginning and then works with it. After alot of help here http://perlmonks.org/?node_id=678974 I rewrote my programm to use fork(), which seems to work MUCH faster and better then the thread version I tried before, because thanks to CopyOnWrite the data is rarely copied. Anyway, the memory usage increases over time alot, so I guess that some readOnly data IS copied.
are there tools which might help me searching for the places where these copying takes place? While I might search manually all these thousands of lines I probably miss some offenders. To be honest, I don't really know what to look for, since we think we only use the data readOnly...
I guess that some copying takes place in hashes, where we do a "if ($hash->{$var})", which probably should be replaced by an "if (defined($hash->{$var}))". Are there other typical mistakes I should look for?
thanks ahead!

In reply to fork(): where does copy happen? by Anonymous Monk

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