Alex Pankratov :
Nov 09, 2017
Does this 3GB log cover more than one backup run?
If it does, then it likely means that some other process is holding a reference to the log file when bvckup2 is trying to rotate it. There will be an error logged to that effect in the central log (bvckup2.log) and I can have a look at it if you'd like (though let's take this over to email).
If it doesn't, i.e. if these 3 gigs are generated by a single backup run, then it's possible to reduce the verbosity of the log to slim it down.