Environment： Red Hat Enterprise Linux ES release 4 (Nahant Update 5)
Linux 2.6.9-55.ELsmp #1 SMP Fri Apr 20 16:36:54 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
top - 16:52:21 up 332 days, 9:09, 2 users, load average: 0.19, 0.22, 0.22
Tasks: 186 total, 1 running, 185 sleeping, 0 stopped, 0 zombie
Cpu(s): 2.5% us, 0.6% sy, 0.0% ni, 96.7% id, 0.0% wa, 0.1% hi, 0.2% si
Mem: 8164644k total, 8146632k used, 18012k free, 16696k buffers
Swap: 16779884k total, 2672616k used, 14107268k free, 670484k cached
PID VIRT RES SHR S %CPU %MEM SWAP CODE DATA COMMAND
28930 1635m 878m 15m S 0 11.0 757m 56 1.5g java
6383 924m 420m 4016 S 5 5.3 503m 56 852m java
24201 1695m 416m 6008 S 3 5.2 1.2g 56 1.6g java
10463 1021m 300m 6052 S 1 3.8 720m 56 915m java
2263 872m 158m 14m S 0 2.0 714m 52 747m java
16611 1334m 118m 3528 S 0 1.5 1.2g 56 1.2g java
7087 359m 48m 6628 S 0 0.6 310m 16 269m emagent
14821 198m 35m 832 S 0 0.5 162m 424 197m rvd
3928 36012 12m 4232 S 0 0.2 22m 176 8080 heartbeat
3309 23692 8004 4116 S 0 0.1 15m 392 7524 opmn
6285 19312 7188 1360 S 0 0.1 11m 244 6496 perfalarm
17089 99.6m 6076 1752 S 0 0.1 93m 24 16m snmpd
As document says:VIRT=SWAP+RES，RES=CODE+DATA
but in the front ,RES≠CODE+DATA,why ?
the sum of each process's SWAP will equal to which value ?
the sum of each process's VIRT will equal to which value ?
man topand read. Sorry, I think this time RTFM is more than justified answer. Come back and ask if there's something in the man page you did not understand. – Janne Pikkarainen Jan 26 '11 at 9:47