此 top 指令輸出中的 CMPRS 是什麼?

此 top 指令輸出中的 CMPRS 是什麼?
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  #WQ #PORTS MEM    PURG   CMPRS  PGRP  PPID  STATE    BOOSTS     %CPU_ME %CPU_OTHRS UID FAULTS    COW    MSGSENT    MSGRECV    SYSBSD    SYSMACH   CSW        PAGEINS IDLEW POWER USER            #MREGS RPRVT  VPRVT  VSIZE  KPRVT  KSHRD 
98414  diskmanagementd  0.0  00:00.50 0    0   0      0B     0B     0B     98414 1     sleeping *0[0]      0.00000 0.00000    0   0         0      0          0          0         0         0          0       0     0.0   root            0      -96K   -32M   0B     0B     0B    
96595  periodic-wrapper 0.0  00:00.03 0    0   0      0B     0B     0B     96595 1     sleeping *0[0]      0.00000 0.00000    0   0         0      0          0          0         0         0          0       0     0.0   root            0      -16K   -16M   0B     0B     0B    

我使用的指令是 top -d -r -l 0 -s 0。

答案1

CMPRS指示記憶體中屬於該進程的壓縮資料的位元組數。

http://macs.about.com/od/macoperatingsystems/fl/Understanding-Compressed-Memory-in-OS-X.htm

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