Anyone seeing this output

Total time for which application threads were stopped: 0.0062360 seconds
Total time for which application threads were stopped: 0.0306220 seconds
Total time for which application threads were stopped: 0.0003010 seconds
Total time for which application threads were stopped: 0.0001170 seconds
Total time for which application threads were stopped: 0.0002410 seconds
Total time for which application threads were stopped: 0.0009190 seconds
Total time for which application threads were stopped: 0.0000820 seconds
Total time for which application threads were stopped: 0.0001940 seconds
Heap
par new generation total 81152K, used 60156K [0x95af0000, 0x9b2f0000, 0x9b2f0000)
eden space 72192K, 71% used [0x95af0000, 0x98d93088, 0x9a170000)
from space 8960K, 92% used [0x9aa30000, 0x9b24bf98, 0x9b2f0000)
to space 8960K, 0% used [0x9a170000, 0x9a170000, 0x9aa30000)
concurrent mark-sweep generation total 272384K, used 20192K [0x9b2f0000, 0xabcf0000, 0xabcf0000)
concurrent-mark-sweep perm gen total 131072K, used 43300K [0xabcf0000, 0xb3cf0000, 0xb3cf0000)


I see this over and over again in "tail -f /opt/zimbra/log/zmmailboxd.out"

Anyone have any ideas what this means as this is new after updating to 6.07

BRW