As a *relatively* new user I'm somewhat confused about SF's role -- it comes across as rather narrow. For example, if a question has a hint of Linux in it it gets booted over to U&L, if it has a hint of databases in it it gets booted to DBA and if you're doing any programming/scripting in your role as a sysadmin and want to ask it it goes to SO. What's left is server configuration questions and Windows as Windows doesn't have a U&L counterpart.

A case in point is a question I'd like to ask about Cloudera Impala memory use (it's failing regularly) and I'd like to know how to go about optimising that cluster. Does it go to SO or maybe DBA? Cloudera Impala is a database technology based on Hadoop, while I see Hadoop questions on here once in awhile I haven't seen any Impala questions (there isn't a corresponding tag either), to me it seems like it should be on SF as the general gist of the question I describe is something that a operations person may be tasked with handling. 

Interested in your opinions.