- Limit number of api workers to roughly using half of system
RAM. Spawning a bunch, just to have the OOM killer nuke them
regularly is not useful.
- Bump the rpc_workers default to half of the api_workers.
A default of 1 falls behind on any reasonably sized node.
Change-Id: I8b84a359f83133014b3d4414aafc10e6b7c6a876
Closes-bug: #1815629