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What's the downside? It worked for him.

The downside is it slows filesystem access down across the board until the caches get repopulated. So sure, go ahead and use it if you like having a slow filesystem.

Caches exist for a reason. Deleting them willy-nilly tends to be a bad idea.

Yeah, I've had zero problems doing this for over a year. I used to get into swap hell every other day and now my life is beautiful and awesome.

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