Talk:Known Bugs And Glitches/@comment-25005178-20140909024940/@comment-24821572-20140922090319

The engine for Terraria is poorly optimized when handling liquids. The flowing liquid takes a sizable bite out of your RAM. I'd say it is a problem with your PC not being able to handle the liquid rather than a real glitch per se.

Of course, this problem is more common on servers/multiplayer worlds. Just do a cleanup on your PC for any junks and it should work fine.