这个 top 命令输出中的 CMPRS 是什么？？？
Processes: 264 total, 2 running, 9 stuck, 253 sleeping, 1229 threads
2015/04/13 17:17:48
Load Avg: 1.00, 1.22, 1.24
CPU usage: 6.36% user, 21.81% sys, 71.81% idle
SharedLibs: 14M resident, 16M data, 0B linkedit.
MemRegions: 120250 total, 3283M resident, 82M private, 540M shared.
PhysMem: 7711M used (1109M wired), 478M unused.
VM: 693G vsize, 1068M framework vsize, 680833(0) swapins, 842308(0) swapouts.
Networks: packets: 3/224B in, 2/196B out.
Disks: 0/0B read, 0/0B written.
PID COMMAND %CPU TIME #TH …