Currently, you cannot configure scribe to rotate every 10 minutes.
Your config tells scribe to rotate every hour at 39 minutes past the
hour (or when the max_size is exceeded). I believe there are a couple
people working on adding support to configure scribe to rotate every n
minutes though.
Also, max_size, create_symlink, rotate_period, rotate_minute, and
write_stats only work if they are inside of a file store, not if you
put them inside of a buffer store. (So your rotate_period in your
primary store will work, but you rotate_period line inside your buffer
store won't do anything).
-Anthony