My Mail.app Mail Index is 1.3GB. How can I reduce this?

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My Leopard machine is choking on Mail.app's index, bursting CPU utilization past 90% for sustained periods.

I noticed my Arq backup program keeps re-uploading a single 1.3GB file, and I have come to suspect that's the message index.

Ideally, I could "archive" items to keep the index from growing so big. Is that possible? Is that advisable? How can I reduce my massive Mail.app email index without actually deleting the data?

editor

Posted 2011-02-16T21:31:57.843

Reputation: 265

Ouch! And people say OUTLOOK can't deal with large files...this is nothing, comparatively. I'll never speak ill of it again... – Shinrai – 2011-02-16T22:56:29.847

Answers

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You could try to vacuum Mail's message index. Open Terminal and enter the following:

sqlite3 ~/Library/Mail/Envelope\ Index vacuum

Daniel Beck

Posted 2011-02-16T21:31:57.843

Reputation: 98 421

wow, i think that Mail.app reacts a lot faster now. Sadly i didn't compare the size before and after the vacuum. – lajuette – 2011-02-16T21:37:11.810

FWIW, I tried this and mine reduced from 80M to 71M -- about 11.5% reduction – Doug Harris – 2011-02-16T22:48:42.980

My Envelope Index only went from 1248247808 to 1170309120 bytes (a reduction of about 6%) -- but hey, I'll take it. Thanks for the good idea. – editor – 2011-02-17T01:59:35.290