Random error's started today

[b998955825]

Went to continue work on my forums and i now get these at randomly generated times.

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
2002 - Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (111)
Query:
[READ] Unable to connect to MySQL server

then i refresh and it either works or goes onto

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, no-reply@x10hosting.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

It was working fine yesterday, any clues? im on Straka, looks like a server issue?