I've built applications with similar memory requirements. Generally there is no reason to store all this in RAM unless you are performing complex matrix operations from the top to the bottom. I would refactor the code and so that it processes one chunk/one line/one customer (whatever) at a time and writes to a file. Better still, if you can, generalise the transformation into code units, you can then string them together with pipes and let the OS worry about disk and RAM management.

In reply to Re: Perl cleanup takes a long time by benno
in thread Perl cleanup takes a long time by ChrisR

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