{"id":868,"date":"2013-05-20T15:45:51","date_gmt":"2013-05-20T07:45:51","guid":{"rendered":"http:\/\/www.yallonking.com\/?p=868"},"modified":"2013-05-20T15:45:51","modified_gmt":"2013-05-20T07:45:51","slug":"%e5%85%b3%e4%ba%8elinux-swap-%e6%b7%bb%e5%8a%a0%e5%88%a0%e9%99%a4%e6%89%8b%e5%8a%a8%e6%b8%85%e7%a9%ba","status":"publish","type":"post","link":"http:\/\/www.yallonking.com\/?p=868","title":{"rendered":"\u5173\u4e8elinux swap-\u6dfb\u52a0\/\u5220\u9664\/\u624b\u52a8\u6e05\u7a7a"},"content":{"rendered":"

\u5173\u4e8elinux swap
\nSwap\u7a7a\u95f4\u7684\u4f5c\u7528\u53ef\u7b80\u5355\u63cf\u8ff0\u4e3a\uff1a\u5f53\u7cfb\u7edf\u7684\u7269\u7406\u5185\u5b58\u4e0d\u591f\u7528\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u5c06\u7269\u7406\u5185\u5b58\u4e2d\u7684\u4e00\u90e8\u5206\u7a7a\u95f4\u91ca\u653e\u51fa\u6765\uff0c\u4ee5\u4f9b\u5f53\u524d\u8fd0\u884c\u7684\u7a0b\u5e8f\u4f7f\u7528\u3002\u90a3\u4e9b\u88ab\u91ca \u653e\u7684\u7a7a\u95f4\u53ef\u80fd\u6765\u81ea\u4e00\u4e9b\u5f88\u957f\u65f6\u95f4\u6ca1\u6709\u4ec0\u4e48\u64cd\u4f5c\u7684\u7a0b\u5e8f\uff0c\u8fd9\u4e9b\u88ab\u91ca\u653e\u7684\u7a7a\u95f4\u88ab\u4e34\u65f6\u4fdd\u5b58\u5230Swap\u7a7a\u95f4\u4e2d\uff0c\u7b49\u5230\u90a3\u4e9b\u7a0b\u5e8f\u8981\u8fd0\u884c\u65f6\uff0c\u518d\u4eceSwap\u4e2d\u6062\u590d\u4fdd\u5b58\u7684\u6570\u636e\u5230 \u5185\u5b58\u4e2d\u3002\u8fd9\u6837\uff0c\u7cfb\u7edf\u603b\u662f\u5728\u7269\u7406\u5185\u5b58\u4e0d\u591f\u65f6\uff0c\u624d\u8fdb\u884cSwap\u4ea4\u6362\u3002
\n\u518d\u6709\uff0c\u5373\u4f7f\u4f60\u7684\u673a\u5668\u62e5\u6709\u8db3\u591f\u591a\u7684\u7269\u7406\u5185\u5b58\uff0c\u4e5f\u6709\u4e00\u4e9b\u7a0b\u5e8f\u4f1a\u5728\u5b83\u4eec\u521d\u59cb\u5316\u65f6\u6b8b\u7559\u7684\u6781\u5c11\u518d\u7528\u5230\u7684\u5185\u5b58\u5206\u9875\u5185\u5bb9\u8f6c\u79fb\u5230 swap \u7a7a\u95f4\uff0c\u4ee5\u6b64\u8ba9\u51fa\u7269\u7406\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n

\u5982\u679c\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u60f3\u8981\u6e05\u7a7a swap \u7a7a\u95f4\uff0c\u53ef\u4ee5\u5148\u7981\u7528 swap\uff0c\u7136\u540e\u518d\u6b21\u542f\u7528\u3002\u4ee5linux\u4e3a\u4f8b\uff1a<\/strong><\/p>\n

\r\n[oracle@ora10gr2 ~]$ top\r\n\r\ntop - 23:58:15 up 6 min,  1 user,  load average: 0.03, 0.20, 0.11\r\nTasks: 106 total,   1 running, 105 sleeping,   0 stopped,   0 zombie\r\nCpu(s):  3.2%us,  3.3%sy,  0.0%ni, 78.4%id, 10.5%wa,  4.1%hi,  0.4%si,  0.0%st\r\nMem:   2075468k total,   520284k used,  1555184k free,    17080k buffers\r\nSwap:  4128696k total,        0k used,  4128696k free,   401756k cached\r\n\r\n[root@ora10gr2 ~]# \/sbin\/swapoff -a\r\n[oracle@ora10gr2 ~]$ top\r\n\r\ntop - 00:00:19 up 9 min,  2 users,  load average: 0.00, 0.12, 0.09\r\nTasks: 114 total,   2 running, 112 sleeping,   0 stopped,   0 zombie\r\nCpu(s):  0.0%us,  0.3%sy,  0.0%ni, 93.3%id,  1.3%wa,  4.3%hi,  0.7%si,  0.0%st\r\nMem:   2075468k total,   536072k used,  1539396k free,    17212k buffers\r\nSwap:        0k total,        0k used,        0k free,   413568k cached\r\n<\/pre>\n
oracle\u6b63\u5e38<\/p>\n
\r\nSQL> select * from gv$version;\r\n\r\n   INST_ID BANNER\r\n---------- ----------------------------------------------------------------\r\n         1 Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod\r\n         1 PL\/SQL Release 10.2.0.1.0 - Production\r\n         1 CORE 10.2.0.1.0      Production\r\n         1 TNS for Linux: Version 10.2.0.1.0 - Production\r\n         1 NLSRTL Version 10.2.0.1.0 - Production\r\n\r\n<\/pre>\n
\r\n\r\n[root@ora10gr2 ~]# \/sbin\/swapon -a\r\n[oracle@ora10gr2 ~]$ top\r\n\r\ntop - 00:01:01 up 9 min,  2 users,  load average: 0.00, 0.11, 0.09\r\nTasks: 114 total,   1 running, 113 sleeping,   0 stopped,   0 zombie\r\nCpu(s):  2.4%us,  2.4%sy,  0.0%ni, 82.6%id,  8.0%wa,  4.2%hi,  0.4%si,  0.0%st\r\nMem:   2075468k total,   538544k used,  1536924k free,    17280k buffers\r\nSwap:  4128696k total,        0k used,  4128696k free,   413920k cached\r\n<\/pre>\n
\u6269\u5bb9\/\u521b\u5efaswap\u7a7a\u95f4<\/strong><\/p>\n
\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026        551       1475          0         17        430\r\n-\/+ buffers\/cache:        103       1922\r\nSwap:         4031          0       4031\r\n[root@ora10gr2 ~]# dd if=\/dev\/zero of=\/mnt\/512Mb.swap bs=1M count=512\r\n512+0 records in\r\n512+0 records out\r\n536870912 bytes (537 MB) copied, 28.3604 seconds, 18.9 MB\/s\r\n[root@ora10gr2 ~]# mkswap \/mnt\/512Mb.swap\r\nSetting up swapspace version 1, size = 536866 kB\r\n[root@ora10gr2 ~]# swapon \/mnt\/512Mb.swap\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026       1071        955          0         18        942\r\n-\/+ buffers\/cache:        110       1916\r\nSwap:         4543          0       4543\r\n<\/pre>\n
\u5199\u5165\u5230fstab\u4e2d<\/strong>
\n\/mnt\/512Mb.swap none swap sw 0 0<\/p>\n
\u5220\u9664swap\u5206\u533a<\/strong><\/p>\n
\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026       1071        955          0         18        942\r\n-\/+ buffers\/cache:        110       1916\r\nSwap:         4543          0       4543\r\n[root@ora10gr2 ~]# swapoff \/mnt\/512Mb.swap\r\n[root@ora10gr2 ~]# rm -rf \/mnt\/512Mb.swap\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026        544       1482          0         18        430\r\n-\/+ buffers\/cache:         95       1931\r\nSwap:         4031          0       4031\r\n<\/pre>\n
\u6e05\u695afstab\u4e2d\u7684\u8bb0\u5f55<\/p>\n
\u552f\u4e00\u7684swap\u7406\u8bba\u4e0a\u4e5f\u662f\u53ef\u4ee5\u5728\u7ebf\u5220\u7684<\/strong><\/p>\n
\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026       1063        962          0         19        942\r\n-\/+ buffers\/cache:        102       1924\r\nSwap:         4031          0       4031\r\n[root@ora10gr2 ~]# cat \/etc\/fstab \r\nLABEL=\/                 \/                       ext3    defaults        1 1\r\nLABEL=\/boot             \/boot                   ext3    defaults        1 2\r\ntmpfs                   \/dev\/shm                tmpfs   defaults        0 0\r\ndevpts                  \/dev\/pts                devpts  gid=5,mode=620  0 0\r\nsysfs                   \/sys                    sysfs   defaults        0 0\r\nproc                    \/proc                   proc    defaults        0 0\r\nLABEL=SWAP-sda3         swap                    swap    defaults        0 0\r\n[root@ora10gr2 ~]# swapoff LABEL=SWAP-sda3\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026        543       1483          0         19        430\r\n-\/+ buffers\/cache:         93       1933\r\nSwap:            0          0          0\r\n[root@ora10gr2 ~]# swapon LABEL=SWAP-sda3\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026        569       1457          0         19        455\r\n-\/+ buffers\/cache:         94       1932\r\nSwap:         4031          0       4031\r\n<\/pre>\n
\u6700\u597d\u662f\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u66ff\u6362\u4e4b\uff0c\u4e5f\u5c31\u662f\u624b\u52a8\u6e05\u7a7aswap\u7a7a\u95f4\uff08\u59cb\u7ec8\u4fdd\u8bc1\u7cfb\u7edf\u5b58\u5728\u4e00\u4e2a\u53ef\u7528\u7684swap\uff09<\/strong><\/p>\n
\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026        569       1457          0         19        455\r\n-\/+ buffers\/cache:         94       1932\r\nSwap:         4031          0       4031\r\n[root@ora10gr2 ~]# dd if=\/dev\/zero of=\/mnt\/512Mb.swap bs=1M count=512\r\n512+0 records in\r\n512+0 records out\r\n536870912 bytes (537 MB) copied, 7.62524 seconds, 70.4 MB\/s\r\n[root@ora10gr2 ~]# mkswap \/mnt\/512Mb.swap\r\nSetting up swapspace version 1, size = 536866 kB\r\n[root@ora10gr2 ~]# swapon \/mnt\/512Mb.swap\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026       1090        936          0         20        967\r\n-\/+ buffers\/cache:        102       1924\r\nSwap:         4543          0       4543\r\n[root@ora10gr2 ~]# cat \/etc\/fstab \r\nLABEL=\/                 \/                       ext3    defaults        1 1\r\nLABEL=\/boot             \/boot                   ext3    defaults        1 2\r\ntmpfs                   \/dev\/shm                tmpfs   defaults        0 0\r\ndevpts                  \/dev\/pts                devpts  gid=5,mode=620  0 0\r\nsysfs                   \/sys                    sysfs   defaults        0 0\r\nproc                    \/proc                   proc    defaults        0 0\r\nLABEL=SWAP-sda3         swap                    swap    defaults        0 0\r\n[root@ora10gr2 ~]# swapoff LABEL=SWAP-sda3\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026       1088        938          0         20        967\r\n-\/+ buffers\/cache:        100       1926\r\nSwap:          511          0        511\r\n[root@ora10gr2 ~]# swapon LABEL=SWAP-sda3\r\n[root@ora10gr2 ~]# swapoff \/mnt\/512Mb.swap\r\n[root@ora10gr2 ~]# rm -rf \/mnt\/512Mb.swap\r\n[root@ora10gr2 ~]# free -m\r\n             total       used       free     shared    buffers     cached\r\nMem:          2026        571       1455          0         20        455\r\n-\/+ buffers\/cache:         95       1931\r\nSwap:         4031          0       4031\r\n<\/pre>\n
\u67e5\u770b\u54ea\u4e2a\u8fdb\u7a0b\u5728\u4f7f\u7528swap
\ntop\u4e0b\uff0c\u6309f\uff0c\u6309p\u6807\u8bb0swap\u51fa\u73b0\u5728top\u8f93\u51fa\u4e2d\uff0c\u6309P\u6309cpu\u6392\u5e8f\uff0c\u6309M\u6309\u5185\u5b58\u6392\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5173\u4e8elinux swap Swap\u7a7a\u95f4\u7684\u4f5c\u7528\u53ef\u7b80\u5355\u63cf\u8ff0\u4e3a\uff1a\u5f53\u7cfb\u7edf\u7684\u7269\u7406\u5185\u5b58\u4e0d\u591f\u7528\u7684\u65f6\u5019\uff0c\u5c31\u9700\u8981\u5c06\u7269\u7406\u5185\u5b58\u4e2d\u7684\u4e00 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[13],"tags":[18,195,197,196],"_links":{"self":[{"href":"http:\/\/www.yallonking.com\/index.php?rest_route=\/wp\/v2\/posts\/868"}],"collection":[{"href":"http:\/\/www.yallonking.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yallonking.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yallonking.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yallonking.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=868"}],"version-history":[{"count":1,"href":"http:\/\/www.yallonking.com\/index.php?rest_route=\/wp\/v2\/posts\/868\/revisions"}],"predecessor-version":[{"id":869,"href":"http:\/\/www.yallonking.com\/index.php?rest_route=\/wp\/v2\/posts\/868\/revisions\/869"}],"wp:attachment":[{"href":"http:\/\/www.yallonking.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=868"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yallonking.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=868"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yallonking.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=868"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}