Is your feature request related to a problem? Please describe.

• On OSX especially, by default nethermind will probably crash during syncing due to open file limit.
• This can be mitigated with something like --Db.MaxOpenFiles 3000.
• This is unclear especially because the error message is Out of memory.

Describe the solution you'd like

• Automatically detect the limit, and set a reasonably lower limit. Remember the limit is applied to each db separately, so combined, it may still exceed it.

Describe alternatives you've considered

• Set a default lower limit, but that will definitely slow down the node.