{"id":1203,"date":"2018-12-21T17:01:11","date_gmt":"2018-12-21T09:01:11","guid":{"rendered":"http:\/\/www.821121.com\/?p=1203"},"modified":"2020-12-21T17:06:38","modified_gmt":"2020-12-21T09:06:38","slug":"linux%e7%b3%bb%e7%bb%9f%e7%a6%81%e7%94%a8%e9%80%8f%e6%98%8e%e5%a4%a7%e9%a1%b5","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1203","title":{"rendered":"linux\u7cfb\u7edf\u7981\u7528\u900f\u660e\u5927\u9875"},"content":{"rendered":"<pre><code class=\"language-sql\">\u3000\u3000Oracle \u5b89\u88c5\u65f6\u5b98\u65b9\u5efa\u8bae\u5173\u95edLinux\u7684\u900f\u660e\u5927\u9875\uff0c\u9632\u6b62\u5185\u5b58\u5ef6\u8fdf\u5206\u914d\u5bfc\u81f4\u7684\u6027\u80fd\u95ee\u9898 https:\/\/docs.oracle.com\/cd\/E11882_01\/install.112\/e47689\/pre_install.htm#LADBI1519\n\u3000\u3000MOS\uff1aID 1557478.1\n \u3000\u3000Because Transparent HugePages are known to cause unexpected node reboots and performance problems with RAC, Oracle strongly advises to disable the use of Transparent HugePages. In addition, Transparent Hugepages may cause problems even in a single-instance database environment with unexpected performance problems or delays. As such, Oracle recommends disabling Transparent HugePages on all Database servers running Oracle.<\/code><\/pre>\n<h1>1.\u67e5\u770b\u900f\u660e\u5927\u9875\u662f\u5426\u542f\u7528<\/h1>\n<pre><code class=\"language-sql\">   RHEL6\uff1a\n\n# cat \/sys\/kernel\/mm\/redhat_transparent_hugepage\/enabled\ncat \/sys\/kernel\/mm\/redhat_transparent_hugepage\/enabled\n[always] madvise never\n   RHEL7\uff1a\n# cat \/sys\/kernel\/mm\/transparent_hugepage\/enabled\n cat \/sys\/kernel\/mm\/transparent_hugepage\/enabled\n[always] madvise never<\/code><\/pre>\n<h1>2.\u7981\u7528\u900f\u660e\u5927\u9875<\/h1>\n<pre><code class=\"language-sql\">RHEL 6\uff1a\n\uff081\uff09.\u7f16\u8f91 \/etc\/grub.conf \u6587\u4ef6\uff0c\u5728kernel \u90a3\u4e00\u884c\u540e\u9762\u8ffd\u52a0 transparent_hugepage=never\nvi \/etc\/grub.conf \n\u4f8b\u5982\uff1a\ndefault=0\ntimeout=5\nsplashimage=(hd0,0)\/grub\/splash.xpm.gz\nhiddenmenu\ntitle Red Hat Enterprise Linux 6 (2.6.32-642.el6.x86_64)\nroot (hd0,0)\nkernel \/vmlinuz-2.6.32-642.el6.x86_64 ro root=\/dev\/mapper\/rootvg-lvroot rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us LANG=en_US.UTF-8 rd_LVM_LV=rootvg\/lvswap rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=rootvg\/lvroot rd_NO_DM rhgb quiet transparent_hugepage=never\ninitrd \/initramfs-2.6.32-642.el6.x86_64.img\n\uff082\uff09.\u91cd\u542f\u7cfb\u7edf\u751f\u6548\u3002\n\nRHEL 7\uff1a\n\uff081\uff09.\u7f16\u8f91\/etc\/sysconfig\/grub \u6587\u4ef6\uff0c\u5728 GRUB_CMDLINE_LINUX \u90a3\u4e00\u884c\u540e\u9762\u8ffd\u52a0 transparent_hugepage=never\n\u4f8b\u5982\uff1a\nGRUB_TIMEOUT=5\nGRUB_DISTRIBUTOR=&quot;$(sed &#039;s, release .*$,,g&#039; \/etc\/system-release)&quot;\nGRUB_DEFAULT=saved\nGRUB_DISABLE_SUBMENU=true\nGRUB_TERMINAL_OUTPUT=&quot;console&quot;\nGRUB_CMDLINE_LINUX=&quot;crashkernel=auto rd.lvm.lv=rootvg\/root rd.lvm.lv=rootvg\/swap rhgb quiet transparent_hugepage=never&quot;\nGRUB_DISABLE_RECOVERY=&quot;true&quot;\n\uff082\uff09.\u518d\u4f7f\u7528 grub2-mkconfig \u751f\u6210grub.cfg\u914d\u7f6e\u6587\u4ef6\u3002\n# grub2-mkconfig -o \/boot\/grub2\/grub.cfg\n\uff083\uff09.\u91cd\u542f\u7cfb\u7edf\u4f7f\u914d\u7f6e\u751f\u6548\u3002<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u3000\u3000Oracle \u5b89\u88c5\u65f6\u5b98\u65b9\u5efa\u8bae\u5173\u95edLinux\u7684\u900f<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[],"class_list":["post-1203","post","type-post","status-publish","format-standard","hentry","category-linux"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1203","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1203"}],"version-history":[{"count":1,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1203\/revisions"}],"predecessor-version":[{"id":1204,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1203\/revisions\/1204"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1203"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1203"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1203"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}