I guess I am dubious about "process some data files, which requires some very large hashes".

A "simple" DB like SQLite probably suits your purpose better than a huge in-memory hash table.
SQLite is actually very sophisticated in how it works.

If you could explain the application in more detail, I am sure that a less memory intensive, and higher performance implementation can be provided.

In reply to Re: Perl memory limit - Windows64 strawberry perl by Marshall
in thread Perl memory limit - Windows64 strawberry perl by sectokia

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