issue_comments: 347815737

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https://github.com/pydata/xarray/issues/1745#issuecomment-347815737 https://api.github.com/repos/pydata/xarray/issues/1745 347815737 MDEyOklzc3VlQ29tbWVudDM0NzgxNTczNw== 6213168 2017-11-29T10:19:52Z 2017-11-29T10:33:15Z MEMBER

It sounds weird. Even if all the 20 variables he's dropping were coords on the longest dim, and the code was loading them up into memory and then dropping them (that would be wrong - but I didn't check the code yet to verify if that's the case), then we're talking about... 405*20*73=~690k points? That's about 5mb of RAM if they're float64?

@njweber2 how large are these files? Is it feasible to upload them somewhere? If not, could you write a script that generates equivalent dummy data and reproduce the problem with that? 

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