{"id":1751,"date":"2016-04-01T23:29:45","date_gmt":"2016-04-01T23:29:44","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=1751"},"modified":"2025-06-13T23:43:37","modified_gmt":"2025-06-14T06:43:37","slug":"often-overlooked-linux-os-tweaks","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/ko\/often-overlooked-linux-os-tweaks\/","title":{"rendered":"\ud754\ud788 \uac04\uacfc\ud558\ub294 Linux OS \uc870\uc815 \uc0ac\ud56d"},"content":{"rendered":"

\uc81c\uac00 \ubcf8 \ud504\ub85c\ub355\uc158 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc0ac\ub78c\ub4e4\uc774 \uc62c\ubc14\ub974\uac8c \uc124\uc815\ud558\ub294 \uac83\uc744 \uac04\uacfc\ud558\ub294 \uac83 \uac19\uc740 \ub450 \uac00\uc9c0 \uac04\ub2e8\ud55c Linux OS \uc218\uc900 \uc124\uc815\uc774 \uc788\uc2b5\ub2c8\ub2e4. \ub2e4\ub978 \uacf3\uc5d0 \ubb38\uc11c\ud654\ub418\uc5b4 \uc788\uc9c0\ub9cc \uacc4\uc18d \ub098\uc624\ub294 \ub0b4\uc6a9\uc774\ub77c \uc5ec\uae30\uc11c \uac04\ub2e8\ud788 \uc0b4\ud3b4\ubcfc \ud544\uc694\uac00 \uc788\uc744 \uac83 \uac19\uc2b5\ub2c8\ub2e4. \uc774 \ud56d\ubaa9\ub4e4\uc774 \ubb34\uc2a8 \ub300\ub2e8\ud55c \ube44\ubc00 \uc124\uc815\uc774\ub098 \ub9c8\ubc95\uc758 \ucd1d\uc54c \uc131\ub2a5\uc744 \ubc18\ub4dc\uc2dc \uace0\uccd0\uc8fc\ub294 \ud56d\ubaa9\uc740 \uc544\ub2c8\uc9c0\ub9cc, \ud504\ub85c\ub355\uc158 Couchbase DB\uc5d0\uc11c\ub294 \uc544\ub798\uc640 \uac19\uc774 \uc62c\ubc14\ub974\uac8c \uc124\uc815\ud558\uace0 Couchbase\uc5d0 \uc0ac\uc6a9\ud558\ub294 \ub178\ub4dc\ub97c \ubd80\ud2b8\uc2a4\ud2b8\ub7a9\ud558\ub294 \ub370 \uc0ac\uc6a9\ud558\ub294 \uc2dc\uc2a4\ud15c\/\ud504\ub85c\uc138\uc2a4\uc5d0 \ud1b5\ud569\ud574\uc57c \ud558\ub294 \ud56d\ubaa9\ub4e4\uc785\ub2c8\ub2e4. \uba64\uce90\uc2dc \uc131\ub2a5\uacfc \uc131\ub2a5 \uc7ac\uc870\uc815 \ubc0f \uacbd\uc6b0\uc5d0 \ub530\ub77c \uc548\uc815\uc131 \ubb38\uc81c\ub97c \ud574\uacb0\ud558\ub294 \ub370 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4.<\/p>\n

\ud504\ub85c\ub355\uc158 \ud658\uacbd\uc73c\ub85c \uc804\ud658\ud558\uae30 \uc804\uc5d0 \ud14c\uc2a4\ud2b8 \ud658\uacbd\uc5d0\uc11c \uba3c\uc800 \ud14c\uc2a4\ud2b8\ud574 \ubcf4\uc2dc\uae30 \ubc14\ub78d\ub2c8\ub2e4.<\/p>\n

\uc2a4\uc651 \uae30\ub2a5\uc740 \uaebc\uc57c \ud569\ub2c8\ub2e4.<\/h2>\n

\ub9ac\ub205\uc2a4 \uac00\uc0c1 \uba54\ubaa8\ub9ac \uc2dc\uc2a4\ud15c\uc5d0 \ub300\ud574 \uc54c\uace0 \uc788\ub2e4\uba74 \uc774 \ubd80\ubd84\uc740 \ub9e4\uc6b0 \uac04\ub2e8\ud569\ub2c8\ub2e4. \uc2a4\uc651 \ub808\ubca8\uc740 \uac00\uc0c1 \uba54\ubaa8\ub9ac \ud558\uc704 \uc2dc\uc2a4\ud15c\uc774 \ub514\uc2a4\ud06c\uc5d0 \uc5bc\ub9c8\ub098 \ub9ce\uc740 \uc2a4\uc651\uc744 \uc2dc\ub3c4\ud574\uc57c \ud558\ub294\uc9c0 \uc54c\ub824\uc90d\ub2c8\ub2e4. \ubb38\uc81c\ub294 \uc2dc\uc2a4\ud15c\uc5d0 \uc0ac\uc6a9 \uac00\ub2a5\ud55c RAM\uc774 \ucda9\ubd84\ud55c \uacbd\uc6b0\uc5d0\ub3c4 \uc2dc\uc2a4\ud15c\uc774 \uba54\ubaa8\ub9ac\uc758 \ud56d\ubaa9\uc744 \uc2a4\uc651\ud558\ub824\uace0 \uc2dc\ub3c4\ud55c\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. OS \uae30\ubcf8\uac12\uc740 \uc77c\ubc18\uc801\uc73c\ub85c 60\uc774\uba70, \uc774\ub294 \uc57d\uac04 \uacf5\uaca9\uc801\uc778 IMO\uc785\ub2c8\ub2e4. \ub2e4\uc74c \uba85\ub839\uc744 \uc2e4\ud589\ud558\uc5ec \uc2dc\uc2a4\ud15c\uc774 \uc5b4\ub5a4 \uac12\uc73c\ub85c \uc124\uc815\ub418\uc5b4 \uc788\ub294\uc9c0 \ud655\uc778\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

\n
cat \/proc\/sys\/vm\/swappiness<\/div>\n<\/div>\n

\uce74\uc6b0\uce58\ubca0\uc774\uc2a4\ub294 \uac00\ub2a5\ud55c \ud55c \uba54\ubaa8\ub9ac\uc5d0\uc11c \uc2e4\uc81c\ub85c \uc791\ub3d9\ud558\ub3c4\ub85d \ud29c\ub2dd\ub418\uc5b4 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4. \uc2a4\uc651 \uac12\uc744 0\uc73c\ub85c \ubcc0\uacbd\ud558\ub294 \uac83\ub9cc\uc73c\ub85c\ub3c4 \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\uac70\ub098 \ucd5c\uc18c\ud55c \uc131\ub2a5 \uc800\ud558\ub97c \ubc29\uc9c0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ube44\uae30\uc220\uc801\uc778 \uc6a9\uc5b4\ub85c \uc124\uba85\ud558\uc790\uba74, \uc774\ub294 OS\uc758 \uac00\uc0c1 \uba54\ubaa8\ub9ac \uc11c\ube0c\uc2dc\uc2a4\ud15c\uc5d0 \uc815\ub9d0 \ud544\uc694\ud55c \uacbd\uc6b0\uac00 \uc544\ub2c8\uba74 RAM\uc5d0\uc11c \ub514\uc2a4\ud06c\ub85c \ud56d\ubaa9\uc744 \uc2a4\uc651\ud558\uc9c0 \uc54a\ub3c4\ub85d \uc9c0\uc2dc\ud558\ub294 \uac83\uc785\ub2c8\ub2e4. \ub178\ub4dc \ud06c\uae30\ub97c \uc62c\ubc14\ub974\uac8c \uc870\uc815\ud558\uae30<\/a>\ub85c \uc124\uc815\ud558\uba74 \uc2a4\uc651\uc774 \ud544\uc694\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \uc774\ub97c \uc124\uc815\ud558\ub824\uba74 sudo\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc74c \ud504\ub85c\uc138\uc2a4\ub97c \uc218\ud589\ud558\uac70\ub098 \uc57c\uc0dd\uc5d0\uc11c \ub77c\uc774\ub529\ud558\ub294 \uacbd\uc6b0 \uadf8\ub0e5 \ub8e8\ud2b8\uac00 \ub418\uc138\uc694.<\/p>\n

\n
# \uc2e4\ud589 \uc911\uc778 \uc2dc\uc2a4\ud15c\uc758 \uac12\uc744 \uc124\uc815\ud569\ub2c8\ub2e4.
\nsudo sh -c 'echo 0 > \/proc\/sys\/vm\/swappiness'<\/p>\n

# \ubc31\uc5c5 sysctl.conf
\nsudo cp -p \/etc\/sysctl.conf \/etc\/sysctl.conf.`date +%Y%m%d-%H:%M`<\/p>\n

# \uc7ac\ubd80\ud305 \ud6c4\uc5d0\ub3c4 \uc774 \uac12\uc774 \uc720\uc9c0\ub418\ub3c4\ub85d \/etc\/sysctl.conf\uc5d0\uc11c \uac12\uc744 \uc124\uc815\ud569\ub2c8\ub2e4.
\nsudo sh -c 'echo \"\" >> \/etc\/sysctl.conf'
\nsudo sh -c '<\/span>echo \"1TP5 \uc2a4\uc651\uc744 \ud53c\ud558\ub824\uba74 \uc2a4\uc651\uc744 0\uc73c\ub85c \uc124\uc815\ud558\uc138\uc694.\" >> \/etc\/sysctl.conf'
\nsudo sh -c '<\/span>echo \"vm.swappiness = 0\" >> \/etc\/sysctl.conf'<\/div>\n<\/div>\n

\uc774\ub97c \uc704\ud574 OS\ub97c \ube4c\ub4dc\ud558\ub294 \ud504\ub85c\uc138\uc2a4\ub97c \ubcf4\uc720\ud558\uac70\ub098 \uc218\uc815\ud574\uc57c \ud569\ub2c8\ub2e4. \uc774\ub294 \uc0c8 \uc778\uc2a4\ud134\uc2a4\ub97c \uc27d\uac8c \ubd88\ub7ec\uc62c \uc218 \uc788\ub294 \ud37c\ube14\ub9ad\/\ud504\ub77c\uc774\ube57 \ud074\ub77c\uc6b0\ub4dc\uc758 \uacbd\uc6b0 \ud2b9\ud788 \uc911\uc694\ud569\ub2c8\ub2e4. Couchbase \ub178\ub4dc\uc5d0 \ub300\ud55c \ube4c\ub4dc \ud504\ub85c\uc138\uc2a4\uc5d0\uc11c \uc774 \ubd80\ubd84\uc744 \ub9cc\ub4e4\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>\n

\ud22c\uba85 \ub300\ud615 \ud398\uc774\uc9c0(THP) \ube44\ud65c\uc131\ud654\ud558\uae30<\/h2>\n

Red Hat Enterprise Linux(RHEL) \ubc84\uc804 6\ubd80\ud130 CentOS 6 \ubc0f 7\uc5d0\uc11c\ub3c4 \ub300\uc6a9\ub7c9 \ud398\uc774\uc9c0\ub97c \uad00\ub9ac\ud558\ub294 \uc0c8\ub85c\uc6b4 \uae30\ubcf8 \ubc29\ubc95\uc774 OS\uc5d0 \uad6c\ud604\ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc6b0\ubd84\ud22c\ub3c4 12.02 \ubc84\uc804\ubd80\ud130 \uc774 \uc124\uc815\uc774 \uc801\uc6a9\ub418\ubbc0\ub85c \uc774 \uc124\uc815\ub3c4 \ubcc0\uacbd\ud574\uc57c \ud569\ub2c8\ub2e4. THP\ub294 \uc2e4\ud589 \uc911\uc778 \ud504\ub85c\uc138\uc2a4 \ubaa8\ub974\uac8c \uc791\uc740 \uba54\ubaa8\ub9ac \ud398\uc774\uc9c0\ub97c \uac70\ub300\ud55c \ud398\uc774\uc9c0\ub85c \uacb0\ud569\ud569\ub2c8\ub2e4. \uc774 \uc544\uc774\ub514\uc5b4\uc758 \ubaa9\uc801\uc740 TLB\uc5d0 \ud544\uc694\ud55c \uc870\ud68c \ud69f\uc218\ub97c \uc904\uc5ec \uc131\ub2a5\uc744 \ud5a5\uc0c1\uc2dc\ud0a4\ub294 \uac83\uc785\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc73c\ub85c \uac70\ub300\ud55c \ud398\uc774\uc9c0\uc758 \uc790\ub3d9\ud654 \ubc0f \uad00\ub9ac\ub97c \uc704\ud55c \ucd94\uc0c1\ud654\ub97c \uac00\uc838\uc635\ub2c8\ub2e4. \uce74\uc6b0\uce58\ubca0\uc774\uc2a4 \uc5d4\uc9c0\ub2c8\uc5b4\ub9c1\uc740 \uba87 \uac00\uc9c0 \uc870\uac74\uc5d0\uc11c \uc774\ub97c \ud655\uc778\ud588\uc2b5\ub2c8\ub2e4,\u00a0THP\uac00 \ud65c\uc131\ud654\ub41c \uacbd\uc6b0 \uc2ec\uac01\ud55c \ud398\uc774\uc9c0 \ud560\ub2f9 \uc9c0\uc5f0\uc73c\ub85c \uc778\ud574 Couchbase Server\uc5d0 \ubd80\uc815\uc801\uc778 \uc601\ud5a5\uc744 \ubbf8\uce60 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/strong>.<\/b><\/span>\u00a0\ub530\ub77c\uc11c \ubaa8\ub4e0 Couchbase Server \ub178\ub4dc\uc5d0\uc11c THP\ub97c \ube44\ud65c\uc131\ud654\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4.<\/p>\n

OS \uc124\uc815\uc744 \ube44\ud65c\uc131\ud654\ud574\uc57c \ud558\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/h3>\n

\ub2e4\uc74c \uba85\ub839\uc744 \uc2e4\ud589\ud558\uc5ec THP\uc758 \uc0c1\ud0dc\ub97c \ud655\uc778\ud569\ub2c8\ub2e4:<\/p>\n

cat \/sys\/\ucee4\ub110\/mm\/transparent_hugepage\/enabled
\ncat \/sys\/\ucee4\ub110\/mm\/transparent_hugepage\/defrag<\/div>\n

\uc77c\ubd80 Red Hat \ub610\ub294 Red Hat \ubcc0\ud615\uc5d0\uc11c\ub294 \uc774 \uc791\uc5c5\uc744 \uc218\ud589\ud574\uc57c \ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

cat \/sys\/\ucee4\ub110\/mm\/redhat_transparent_hugepage\/enabled
\ncat \/sys\/\ucee4\ub110\/mm\/redhat_transparent_hugepage\/defrag<\/div>\n

\ud558\ub098 \ub610\ub294 \ub450 \ud30c\uc77c \ubaa8\ub450\uc5d0\uc11c \ucd9c\ub825\uc774 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\uc2dc\ub418\ub294 \uacbd\uc6b0 \uc544\ub798 \uc808\ucc28\uac00 \ud544\uc694\ud569\ub2c8\ub2e4:<\/p>\n

[\ud56d\uc0c1] \ub9e4\ub4dc\ubc14\uc774\uc2a4 \uc808\ub300<\/div>\n

\u00a0<\/p>\n

\ucd08\uae30\ud654 \uc2a4\ud06c\ub9bd\ud2b8 \ubcf5\uc0ac<\/h3>\n

\ucd08\uae30\ud654 \uc2a4\ud06c\ub9bd\ud2b8\ub294 \uc7ac\ubd80\ud305 \uc2dc Couchbase\uac00 \ub85c\ub4dc\ub418\ub294 \ub3d9\uc2dc\uc5d0 \ubcc0\uacbd \uc0ac\ud56d\uc774 \uc801\uc6a9\ub418\ub3c4\ub85d \uc124\uacc4\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n

#!\/bin\/bash
\n### \uc2dc\uc791 \ucd08\uae30\ud654 \uc815\ubcf4
\n# \uc81c\uacf5: disable-thp
\n# \ud544\uc218-\uc2dc\uc791: $local_fs
\n# \ud544\uc218-\uc815\uc9c0:
\n# \uae30\ubcf8 \uc2dc\uc791: 2 3 4 5
\n# \uae30\ubcf8-\uc815\uc9c0: 0 1 6
\n# \uac04\ub2e8\ud55c \uc124\uba85: THP \ube44\ud65c\uc131\ud654
\n# \uc124\uba85: \ubd80\ud305 \uc2dc \ud22c\uba85 \uac70\ub300 \ud398\uc774\uc9c0(THP)\ub97c \ube44\ud65c\uc131\ud654\ud569\ub2c8\ub2e4.
\n### END INIT \uc815\ubcf4<\/div>\n

\u00a0<\/p>\n

\ucf00\uc774\uc2a4 $1 in
\n\u00a0 \uc2dc\uc791)
\n\u00a0 \u00a0 if [ -d \/sys\/kernel\/mm\/transparent_hugepage ]; then
\n\u00a0 \u00a0 \u00a0 \u00a0echo 'never' > \/sys\/kernel\/mm\/transparent_hugepage\/enabled
\n\u00a0 \u00a0 \u00a0 \u00a0echo 'never' > \/sys\/kernel\/mm\/transparent_hugepage\/defrag
\n\u00a0 \u00a0 elif [ -d \/sys\/kernel\/mm\/redhat_transparent_hugepage ]; then
\n\u00a0 \u00a0 \u00a0 echo 'never' > \/sys\/kernel\/mm\/redhat_transparent_hugepage\/enabled
\n\u00a0 \u00a0 \u00a0 echo 'never' > \/sys\/kernel\/mm\/redhat_transparent_hugepage\/defrag
\n\u00a0 \u00a0else
\n\u00a0 \u00a0 \u00a0 \ubc18\ud658 0
\n\u00a0 \u00a0fi
\n\u00a0 \u00a0;;
\nesac<\/div>\n

\u00a0<\/p>\n

OS\uc5d0 \ucf54\ub4dc\ub97c \ub4f1\ub85d\ud558\ub294 \ubc29\ubc95<\/h2>\n

\ub2e4\uc74c\uc744 \uc218\ud589\ud569\ub2c8\ub2e4:<\/p>\n

\uc704\uc758 \ucf54\ub4dc\ub85c \ud30c\uc77c\uc744 \ub9cc\ub4ed\ub2c8\ub2e4.<\/p>\n

$ sudo vi \/etc\/init.d\/disable-thp<\/div>\n

\u00a0<\/p>\n

\ud30c\uc77c\uc744 \uc2e4\ud589 \ud30c\uc77c\ub85c \ubcc0\uacbd\ud569\ub2c8\ub2e4.<\/p>\n

$ sudo chmod 755 \/etc\/init.d\/disable-thp<\/div>\n

\u00a0<\/p>\n

\uc9c0\uae08 \ubc14\ub85c \uc801\uc6a9\ub418\ub3c4\ub85d \uc2e4\ud589\ud558\uc138\uc694.<\/p>\n

$ sudo \uc11c\ube44\uc2a4 \ube44\ud65c\uc131\ud654-thp \uc2dc\uc791<\/div>\n

\u00a0<\/p>\n

\ubd80\ud305 \uc2dc \ucd08\uae30\ud654 \uc2a4\ud06c\ub9bd\ud2b8\uac00 \uc2dc\uc791\ub418\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/h3>\n

Red Hat \ubcc0\ud615:<\/p>\n

$ sudo chkconfig disable-thp on<\/div>\n

\u00a0<\/p>\n

\uc6b0\ubd84\ud22c:<\/p>\n

$ sudo update-rc.d disable-thp \uae30\ubcf8\uac12 \uc124\uc815<\/div>\n

\u00a0<\/p>\n

\ud504\ub85c\uc138\uc2a4 \ud14c\uc2a4\ud2b8<\/h3>\n

\ub2e4\uc74c \uba85\ub839\uc744 \uc2e4\ud589\ud558\uc5ec THP\uc758 \uc0c1\ud0dc\ub97c \ud655\uc778\ud569\ub2c8\ub2e4:<\/p>\n

cat \/sys\/\ucee4\ub110\/mm\/transparent_hugepage\/enabled
\ncat \/sys\/\ucee4\ub110\/mm\/transparent_hugepage\/defrag<\/div>\n

\u00a0<\/p>\n

\uc77c\ubd80 Red Hat \ub610\ub294 Red Hat \ubcc0\ud615\uc5d0\uc11c\ub294 \uc774 \uc791\uc5c5\uc744 \ub300\uc2e0 \uc218\ud589\ud574\uc57c \ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

cat \/sys\/\ucee4\ub110\/mm\/redhat_transparent_hugepage\/enabled
\ncat \/sys\/\ucee4\ub110\/mm\/redhat_transparent_hugepage\/defrag<\/div>\n

\u00a0<\/p>\n

\ub450 \ud30c\uc77c \ubaa8\ub450 \ucd9c\ub825\uc740 \ub2e4\uc74c\uacfc \uac19\uc544\uc57c \ud569\ub2c8\ub2e4:<\/p>\n

\ud56d\uc0c1 \ub9e4\ub4dc\ubc14\uc774\uc2a4 [\uc808\ub300]<\/div>\n

\u00a0<\/p>\n

\ucc38\uace0: \uc774 \uc791\uc5c5\uc744 \uc218\ud589\ud558\ub294 \ub2e4\ub978 \ubc29\ubc95\uc740 \ub2e4\ub978 \uacf3\uc5d0\uc11c \ucc3e\uc744 \uc218 \uc788\uc73c\uba70 \/etc\/grub.conf\ub97c \ud3b8\uc9d1\ud569\ub2c8\ub2e4. \uc774 \ubc29\ubc95\uc740 \uc55e\uc73c\ub85c \ucee4\ub110\uc774 \uc5c5\ub370\uc774\ud2b8\ub420 \ub54c\ub9c8\ub2e4 \ubb38\uc81c\uac00 \uc0dd\uae38 \uc218 \uc788\ub2e4\ub294 \uc810\uc774 \ubb38\uc81c\uc785\ub2c8\ub2e4. \uc81c\uac00 \uc81c\uc548\ud558\ub294 \ubc29\ubc95\uc740 \uc7a5\uae30\uc801\uc73c\ub85c \uad00\ub9ac\ud558\uae30 \uc27d\uace0 \ub178\ub4dc\ub97c \ubd80\ud305\ud560 \ub54c Puppet \ubaa8\ub4c8\uc774\ub098 Chef \ub808\uc2dc\ud53c \uac19\uc740 \uac83\uc5d0 \ub123\uc5b4 rc.local \ub05d\uc5d0 \ucd94\uac00\ud558\uae30 \uc27d\uc2b5\ub2c8\ub2e4.<\/p>\n

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There are two simple linux OS level settings that people seem to be overlooking setting correctly on their production systems I have seen. 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