High RAM consumption

Hi @shrimalmadhur, I would like to give you a status update from my side:
The very high RAM consumption due to the `"memory_limit_disabled" = true` hotfix for https://github.com/coinbase/rosetta-cli/issues/245 now is indeed a problem as rosetta-cli breaks down after some hours already with 16 GB RAM.
Unfortunately I also can't run the rosetta-cli without `"memory_limit_disabled" = true` else it will break in the account bootstrapping phase as it can't handle large bootsrapping.json files https://github.com/coinbase/rosetta-cli/issues/245.

I guess it all comes back to the Badger Tx size / or how the Badger commits are done. Maybe this could be adjusted or are there other options?

Many thanks for your time and efforts.