Running bundle install for the first time rinses ram so hard. For me, each process uses over 250mb of ram each, and heroku buildpacks use 4 of them by default. This would be a valid reason to use swap IMO, since you don't do it very often. I just created a swapfile on my server for this purpose.

If bundle install is using 250 MB of RAM, you really ought to investigate what the heck it's doing.

- Les

Simply put, swap is bad - mkay?

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Either provide enough details for people to help, or sit back and listen to the crickets chirp.
Security thru obscurity is a myth - and really really annoying.