HI I would expect that to capture about 2 minutes of issues.
usually loglevel 5 is not needed to find root cause of most supports issues.
Usually 3 is high enough.
if you have a busy hub I would not expect for than a few hours at best in the logsize that can be used.
Usually we start seeing issues on logs that get to be over 100 MBS
I would set the loglevel to 3 and logsize to 95000 and that should give you the longest possible retention without causing issue with the probe.
Hope this helps.