Docs request: describe relevant AWS limits

[maplebed]

I set this up, and the first time we did a quick(ish) roll of one service, we got throttled by AWS. In the log we see ThrottlingException: Rate exceeded, which is thrown from the call to s.svc.DescribeParameters.

The problem is that I can't figure out which limit is being applied in order to ask AWS to raise it, or if I've set up chamber wrong in some way that is causing it to make more calls than it should.

When trying to recreate this on my laptop, I launched 10 parallel versions of while :; do ./chamber exec dev -- env ; done and triggered the throttle after ~20 requests. This seems very low.

Could you describe which AWS limits are relevant to what parts of chamber's execution, and when we should expect to hit each? If you have any idea which limits they're happy to adjust and which we need to work around that would also be valuable.