There was a local SQL Server 2012 instance. Once memory has decreased to critical 128 MB and then has stopped by me.
I can not start it (idea: not enough memory).
Is it possible to increase this limit in config file or in system registry?
-f, click Add, then click Apply
This will start the instance in minimal configuration mode (single user, no CHECKPOINT, and no startup procedures are run), which should allow you enough resources to connect and fix what you broke.