Questions about consumption of the swap memory. A great doubt !!

[pauloedusp]

I have a great doubt about the memory swap look at the output of top command:

top - 10:22:20 up 62 days, 14:21, 2 users, load average: 1.18, 1.16, 0.97
Tasks: 496 total, 2 running, 494 sleeping, 0 stopped, 0 zombie
Cpu(s): 6.4%us, 0.3%sy, 0.0%ni, 93.3%id, 0.1%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 98989136k total, 98239664k used, 749472k free, 389848k buffers
Swap: 16777016k total, 416668k used, 16360348k free, 94831756k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ SWAP COMMAND
6272 oracle 25 0 40.1g 1.9g 1.9g R 99.4 2.0 23:20.84 38g oracle
11999 oracle 15 0 13028 1440 832 R 0.7 0.0 0:00.09 11m top
11805 oracle 15 0 40.1g 171m 167m S 0.3 0.2 0:00.24 39g oracle
32561 oracle 16 0 40.2g 125m 118m S 0.3 0.1 10:49.09 40g oracle
32643 oracle 16 0 1051m 9140 6292 S 0.3 0.0 5:14.51 1.0g tnslsnr
1 root 15 0 10372 692 584 S 0.0 0.0 5:07.01 9680 init
2 root RT -5 0 0 0 S 0.0 0.0 0:04.61 0 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.02 0 ksoftirqd/0
4 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/0
5 root RT -5 0 0 0 S 0.0 0.0 0:05.14 0 migration/1
6 root 34 19 0 0 0 S 0.0 0.0 0:00.74 0 ksoftirqd/1
7 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/1
8 root RT -5 0 0 0 S 0.0 0.0 0:15.72 0 migration/2
9 root 34 19 0 0 0 S 0.0 0.0 0:00.11 0 ksoftirqd/2
10 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/2
11 root RT -5 0 0 0 S 0.0 0.0 0:09.42 0 migration/3
12 root 34 19 0 0 0 S 0.0 0.0 0:00.87 0 ksoftirqd/3
13 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/3
14 root RT -5 0 0 0 S 0.0 0.0 0:04.31 0 migration/4
15 root 34 19 0 0 0 S 0.0 0.0 0:00.07 0 ksoftirqd/4
16 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/4
17 root RT -5 0 0 0 S 0.0 0.0 0:13.61 0 migration/5
18 root 34 19 0 0 0 S 0.0 0.0 0:00.44 0 ksoftirqd/5
19 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/5
20 root RT -5 0 0 0 S 0.0 0.0 0:06.21 0 migration/6
21 root 34 19 0 0 0 S 0.0 0.0 0:00.06 0 ksoftirqd/6
22 root RT -5 0 0 0 S 0.0 0.0 0:00.00 0 watchdog/6
23 root RT -5 0 0 0 S 0.0 0.0 0:14.79 0 migration/7
24 root 34 19 0 0 0 S 0.0 0.0 0:00.33 0 ksoftirqd/7


The size of my swap is 16GB how can the oracle process use 40 GB of swap?
How can I monitor the consumption of the swap already searched some forums and got no clear answers.

I appreciate the help !!!

[manyrootsofallevil]

There is a good explanation here:

Top - what does Virtual memory size mean? ...linux/ubuntu - Server Fault