[freebsd] swap공간을 파일로 추가하기

빨간글씨만 따라하면 됨. ^^

[ystest ~ # ] uname -a

FreeBSD ystest.ystest.co.kr 10.3-RELEASE-p7 FreeBSD 10.3-RELEASE-p7 #0: Thu Aug 11 18:38:15 UTC 2016     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERys  amd64

[ystest ~ # ] top

last pid: 49787;  load averages:  0.20,  0.19,  0.14                                                   up 166+16:55:11 09:22:47

44 processes:  1 running, 43 sleeping

CPU 0:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 1:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 2:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 3:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 4:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 5:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 6:     % user,     % nyse,     % system,     % interrupt,     % idle

CPU 7:     % user,     % nyse,     % system,     % interrupt,     % idle

Mem: 17M Active, 978M Inact, 14G Wired, 40M Cache, 1646M Buf, 289M Free

ARC: 10G Total, 3465M MFU, 5828K MRU, 16K Anon, 225M Header, 6427M Other

Swap: 764M Total, 566M Used, 198M Free, 74% Inuse

[ystest ~ # ] swapinfo 

Devyse          1K-blocks     Used    Avail Capacity

/dev/ada0p3        782336   579924   202412    74%

[ystest ~ # ] df -h

Filesystem     Size    Used   Avail Capacity  Mounted on

/dev/ada0p2     14G    5.1G    7.4G    41%    /

devfs          1.0K    1.0K      0B   100%    /dev

ys             3.5T    2.4T    1.1T    70%    /ys

[ystest ~ # ] swapctl -l

Devyse:       1024-blocks     Used:

/dev/ada0p3      782336    579924

[ystest ~ # ] swapctl -s

Total:           782336    579924

[ystest ~ # ] swapctl -s -h

Total:              764M       566M

[ystest ~ # ] df

Filesystem   1K-blocks       Used      Avail Capacity  Mounted on

/dev/ada0p2   14216508    5363336    7715852    41%    /

devfs                1          1          0   100%    /dev

ys          3766982544 2629394295 1137588249    70%    /ys

[ystest ~ # ] dd if=/dev/zero of=/swap0 bs=1M count=1024

1024+0 records in

1024+0 records out

1073741824 bytes transferred in 29.446623 secs (36464006 bytes/sec)

[ystest ~ # ] chmod 0600 /swap0 

[ystest ~ # ] vi /etc/fstab 

# Devyse        Mountpoint      FStype  Options Dump    Pass#

/dev/ada0p2     /               ufs     rw      1       1

/dev/ada0p3     none            swap    sw      0       0

md99            none            swap    sw,file=/swap0,late     0       0

[ystest ~ # ] swapon -aL

swapon: adding /dev/md99 as swap devyse

[ystest ~ # ] df -h

Filesystem     Size    Used   Avail Capacity  Mounted on

/dev/ada0p2     14G    6.1G    6.4G    49%    /

devfs          1.0K    1.0K      0B   100%    /dev

ys             3.5T    2.4T    1.1T    70%    /ys

[ystest ~ # ] swapctl -l

Devyse:       1024-blocks     Used:

/dev/ada0p3      782336    579924

/dev/md99       1048576         0

[ystest ~ # ] top

last pid: 50439;  load averages:  0.18,  0.12,  0.09                                                   up 166+17:11:59 09:39:35

49 processes:  1 running, 48 sleeping

CPU 0:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

CPU 1:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

CPU 2:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

CPU 3:  0.0% user,  0.0% nice,  0.4% system,  0.0% interrupt, 99.6% idle

CPU 4:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

CPU 5:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

CPU 6:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

CPU 7:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

Mem: 21M Active, 1159M Inact, 14G Wired, 12M Cache, 1646M Buf, 318M Free

ARC: 9621M Total, 3308M MFU, 6292K MRU, 16K Anon, 224M Header, 6083M Other

Swap: 1788M Total, 566M Used, 1221M Free, 31% Inuse