Updating Data/Recommended PHP Settings

I am testing out this awesome plugin with an Ancestry.com generated GEDCOM file that has about 1500 people in it.

The initial load goes just fine and am able to add pages for everyone. However when I make a change to the ancestry data and reexport, hoping to update the data in the test, I get the whitescreen.

I have both timeouts set to 600, but the whitescreen happens long before the timeout would normally expire.

Are there any recommended PHP.ini settings?

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