Non-responsive after 1.15.0.659 ubuntu upgrade

With regards to the memory snapshots - i presume these were all at :00 seconds precisely? Is that right?

Date/Time	 	 	 Memory 
03/21/19 01:23:00	 2,754,336 
03/21/19 01:24:00	 3,352,356 	*****  +600Mb

03/21/19 07:05:00	 3,804,960 
03/21/19 07:06:00	 4,419,372 	*****	+615Mb	(logs available)

03/21/19 19:05:00	 4,394,784 
03/21/19 19:06:00	 4,943,660 	*****	+550Mb	(logs available)

03/21/19 23:05:00	 4,796,196 
03/21/19 23:06:00	 5,353,236 	*****	+557Mb

03/22/19 06:44:00	 5,508,848 
03/22/19 06:45:00	 5,967,600 	*****	+459Mb	(logs available)

03/22/19 10:44:00	 5,975,796 
03/22/19 10:45:00	 6,434,548 	*****	+459Mb	(logs available)