How to increase the memory available to diff in cygwin 1.7?

[Christopher Faylor]

On Mon, Oct 26, 2009 at 11:41:13AM -0400, Kenneth Chiu wrote:
>I'm trying to diff two large directories, recursively, and
>I'm getting this error:
>
>    $ diff -rq B B2 >diff.out
>    diff: memory exhausted
>
>I looked at this URL
>
>    http://cygwin.com/cygwin-ug-net/setup-maxmem.html
>
>but it seemed out-of-date.  There was no such key in the
>registry, and the options to the regtool were different from
>what the regtool man page says.
>
>Any suggestions on how to get rid of the memory
>exhaustion error?  Is there a new key path that I should
>use for the heap_chunk_in_mb value?  Is it possible
>that I'm simply bumping into a 2 GB limit for
>32-bit processes?  (And if that is the case,
>is there a recommended way to go to 64-bit?)

AFAIK, this is just a limitation of diff.  You can get the same
error on linux.

This was discussed in some detail in this list a few months ago.

cgf

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