{"id":244,"date":"2025-07-14T22:01:52","date_gmt":"2025-07-14T14:01:52","guid":{"rendered":"https:\/\/yuzikimikage.top\/?p=244"},"modified":"2025-11-26T17:30:28","modified_gmt":"2025-11-26T09:30:28","slug":"hugepages","status":"publish","type":"post","link":"https:\/\/yuzikimikage.top\/index.php\/2025\/07\/14\/hugepages\/","title":{"rendered":"PG\u5f00\u542f\u5927\u9875"},"content":{"rendered":"\n

1 \u4e3a\u4ec0\u4e48\u8981\u5f00\u542f\u5927\u9875<\/h1>\n\n\n\n

\u5185\u5b58\u8868\u6620\u5c04\u4f18\u5316<\/h2>\n\n\n\n

\u64cd\u4f5c\u7cfb\u7edf\u7684\u865a\u62df\u5185\u5b58\u7ba1\u7406\uff0c\u6211\u4eec\u6240\u770b\u5230\u7684\u4efb\u4f55\u5730\u5740\u90fd\u662f\u865a\u62df\u5730\u5740\uff0c\u800c\u9875\u8868\u7ef4\u62a4\u4e86\u865a\u62df\u5185\u5b58\u5730\u5740\u5230\u5b9e\u9645\u7269\u7406\u5185\u5b58\u5730\u5740\u7684\u6620\u5c04\u5173\u7cfb\u3002\u9875\u9762\u8d8a\u5927\uff0c\u9875\u9762\u7684\u6570\u91cf\u5c31\u8d8a\u5c11\uff0c\u6620\u5c04\u8868\u5c31\u8d8a\u5c0f\uff0c\u6620\u5c04\u901f\u5ea6\u5c31\u8d8a\u5feb\u3002<\/p>\n\n\n\n

\u4f7f\u7528hugepage\u53ef\u4ee5\u51cf\u5c11\u9875\u8868\u5927\u5c0f\u3002<\/p>\n\n\n\n

\u64cd\u4f5c\u7cfb\u7edf\u4f7f\u7528TLB\u6765\u52a0\u901f\u8fd9\u4e2a\u6620\u5c04\u8fc7\u7a0b\uff0c\u5982\u679c\u7269\u7406\u5730\u5740\u5728TLB\u4e2d\u547d\u4e2d\uff0c\u76f4\u63a5\u8f6c\u6362\u4e3a\u7269\u7406\u5730\u5740\uff0c\u53ea\u8bbf\u95ee\u4e00\u6b21\u5185\u5b58\u5730\u5740\u3002\u5426\u5219\u626b\u63cf\u9875\u8868\u67e5\u627e\u5730\u5740\uff0c\u7136\u540e\u6620\u5c04\u6761\u76ee\u5230TLB\uff0c\u7136\u540e\u518d\u8f6c\u6362\u4e3a\u7269\u7406\u5730\u5740\uff0c\u8fd9\u6837\u5c31\u6709\u4e24\u6b21\u5185\u5b58\u8bbf\u95ee\u3002\u6700\u5dee\u7684\u662f\u9875\u8868\u4e2d\u4e5f\u6ca1\u6709\uff0c\u9700\u8981\u4ece\u78c1\u76d8\u5199\u5230\u9875\u8868\uff0c\u90a3\u4e48\u8fd9\u6837\u6548\u7387\u4f1a\u66f4\u6162\u3002<\/p>\n\n\n\n

\u56e0\u4e3aTLB\u53ea\u80fd\u4fdd\u5b58\u51e0\u5343\u4e2a\u6761\u76ee\uff0c\u4e3a\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u6709\u4e24\u4e2a\u529e\u6cd5\uff1a<\/p>\n\n\n\n

    \n
  1. \u589e\u52a0TLB\u7684\u5927\u5c0f\uff0c\u6210\u672c\u592a\u9ad8<\/li>\n\n\n\n
  2. \u589e\u52a0\u5185\u5b58\u9875\u9762\u7684\u5927\u5c0f\uff0c\u6bd4\u5982\u5982\u679cTLB\u53ea\u80fd\u5bf9\u5e94256\u4e2a\u9875\u8868\u9879\uff0c\u9875\u9762\u5927\u5c0f\u4e3a1GB\uff0c\u90a3\u4e48TLB\u5c31\u80fd\u6620\u5c04\u5230256G\u7684\u5185\u5b58\u7a7a\u95f4<\/li>\n<\/ol>\n\n\n\n

    2 \u5177\u4f53\u6b65\u9aa4<\/h1>\n\n\n\n

    2.1 \u67e5\u770bLinux\u7684Huge pages\u9875\u5927\u5c0f<\/h2>\n\n\n\n
    grep Hugepage \/proc\/meminfo<\/code><\/pre>\n\n\n\n
    \u5728Linux\u7cfb\u7edf\u4e2d\uff0cHuge Pages\u7684\u9ed8\u8ba4\u5927\u5c0f\u901a\u5e38\u662f2MB\uff0c\u8fd9\u662f\u7cfb\u7edf\u5728\u672a\u7ecf\u8fc7\u4efb\u4f55\u989d\u5916\u914d\u7f6e\u65f6\u9ed8\u8ba4\u652f\u6301\u7684\u5927\u9875\u5927\u5c0f\u3002<\/p>\n\n\n\n
    \u5982\u679c\u9700\u8981\u4f7f\u7528\u66f4\u5927\u7684\u9875\u9762\uff08\u59821GB\uff09\uff0c\u5219\u9700\u8981\u5728\u7cfb\u7edf\u542f\u52a8\u65f6\u901a\u8fc7 GRUB \u914d\u7f6e \u660e\u786e\u8bbe\u7f6e\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5728 \/etc\/default\/grub \u6587\u4ef6\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u53c2\u6570\u6765\u542f\u75281GB\u7684\u5927\u9875\u5185\u5b58\uff1a<\/p>\n\n\n\n
    vi \/etc\/default\/grub\nGRUB_CMDLINE_LINUX=\"default_hugepagesz=1G hugepagesz=1G hugepages=1\"<\/code><\/pre>\n\n\n\n
    \u7136\u540e\u901a\u8fc7 grub2-mkconfig \u547d\u4ee4\u66f4\u65b0 GRUB \u914d\u7f6e\u5e76\u91cd\u542f\u7cfb\u7edf\u3002<\/p>\n\n\n\n
    2.2 \u8ba1\u7b97\u9700\u8981\u7684\u5927\u9875\u6570\u91cf<\/h2>\n\n\n\n
    \u5047\u8bbe\u6211\u4eec\u7684\u5185\u5b58\u6709512GB\uff0cshared_buffer\u8bbe\u7f6e\u4e3a128GB\uff0c\u5982\u4f55\u8ba1\u7b97\u9700\u8981\u7684\u5927\u9875\u6570\u91cf\uff1f<\/p>\n\n\n\n
    \u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528<\/strong>PG<\/strong>\u7684\u5185\u7f6e\u5de5\u5177<\/strong><\/strong><\/p>\n\n\n\n
    \u4ecePG15\u5f00\u59cb\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u76f4\u63a5\u8ba1\u7b97\u6240\u9700\u7684\u5927\u9875\u6570\u91cf<\/p>\n\n\n\n
    su - postgres\n\/usr\/pgsql-15\/bin\/postgres --shared-buffers=20GB -D $PGDATA -C shared_memory_size_in_huge_pages<\/code><\/pre>\n\n\n\n
    \u5047\u8bbe\u8f93\u51fa\u4e3a 10475\uff0c\u5219\u8868\u793a\u9700\u8981 10475 \u4e2a\u5927\u9875\u3002\u8fd9\u79cd\u65b9\u6cd5\u8003\u8651\u4e86\u6240\u6709\u76f8\u5173\u56e0\u7d20\uff0c\u662f\u6700\u7cbe\u786e\u7684\u3002<\/p>\n\n\n\n
    \u65b9\u6cd5\u4e8c\uff1a\u624b\u52a8\u9a8c\u8bc1<\/strong><\/p>\n\n\n\n
    shared_buffer\u8bbe\u7f6e\u4e3a128GB\uff0c128GB\/2MB=65535\uff0c\u4e00\u822c\u6765\u8bb2\uff0c\u9884\u75593-5G\u7684\u8d44\u6e90<\/p>\n\n\n\n
    \u53d6\u4e00\u4e2a\u6bd465535\u7565\u5927\u7684\u503c,\u6bd4\u598267537,\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u7cbe\u786e,\u82e5\u7cfb\u7edf\u63d0\u793a\u5206\u914d\u5931\u8d25,\u5219\u8c03\u5c0f\u91cd\u8bd5<\/p>\n\n\n\n
    2.3 \u8bbe\u7f6e\u5927\u9875\u6570\u91cf<\/h2>\n\n\n\n
    \u8bbe\u7f6elinux\u7684Huge Pages\u4e2a\u6570\uff0c\u7acb\u5373\u751f\u6548\uff0c\u4f46\u8fd9\u662f\u4e34\u65f6\u7684\uff0c\u7cfb\u7edf\u91cd\u542f\u540e\u4f1a\u5931\u6548<\/p>\n\n\n\n
    sysctl -w vm.nr_hugepages=67537   <\/code><\/pre>\n\n\n\n
    \u5047\u8bbe\u64cd\u4f5c\u7cfb\u7edf\u7684postgres\u7528\u6237\u7684\u7ec4id\u4e3a1002<\/p>\n\n\n\n
    \u6c38\u4e45\u8bbe\u7f6e\u9700\u8981\u7f16\u8f91\u6587\u4ef6 \/etc\/sysctl.conf\uff0c\u5728\u672b\u5c3e\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9<\/p>\n\n\n\n
    vm.nr_hugepages = 67537\nvm.hugetbl_shm_group = 1002<\/code><\/pre>\n\n\n\n
    \u914d\u7f6e\u751f\u6548<\/p>\n\n\n\n
    sysctl -p<\/code><\/pre>\n\n\n\n
    \u6253\u5f00\u6570\u636e\u5e93\u7684\u5927\u9875\u53c2\u6570<\/p>\n\n\n\n
    vi \/$PGDATA\/postgresql.conf\nhuge_pages = on                 # on, off, or try   \n\n# \u8bbe\u7f6e\u4e3atry\u7684\u8bdd\uff0c\u4f1a\u5148\u5c1d\u8bd5huge page\uff0c\u5982\u679c\u542f\u52a8\u65f6\u65e0\u6cd5\u9501\u5b9a\u7ed9\u5b9a\u6570\u76ee\u7684\u5927\u9875\uff0c\u5219\u4e0d\u4f1a\u4f7f\u7528huge page<\/code><\/pre>\n\n\n\n
    \u91cd\u542f\u6570\u636e\u5e93\u4e4b\u540e\uff0c\u67e5\u770b\u5f53\u524d\u7684\u5927\u9875\u914d\u7f6e<\/p>\n\n\n\n
    cat \/proc\/meminfo |grep -i huge\n\nAnonHugePages:      6144 kB   \nHugePages_Total:   67537  ## \u8bbe\u7f6e\u7684HUGE PAGE   \nHugePages_Free:    66117  ## \u8fd9\u4e2a\u662f\u5f53\u524d\u5269\u4f59\u7684\uff0c\u4f46\u662f\u5b9e\u9645\u4e0a\u771f\u6b63\u53ef\u7528\u7684\u5e76\u6ca1\u6709\u8fd9\u4e48\u591a\uff0c\u56e0\u4e3a\u88abPG\u9501\u5b9a\u4e8665708\u4e2a\u5927\u9875   \nHugePages_Rsvd:    65708  ## \u542f\u52a8PG\u65f6\u7533\u8bf7\u7684HUGE PAGE   \nHugePages_Surp:        0   \nHugepagesize:       2048 kB   ## \u5f53\u524d\u5927\u98752M   <\/code><\/pre>\n\n\n\n
    \u6267\u884c\u4e00\u4e9b\u67e5\u8be2\u4e4b\u540e\uff0c\u4f1a\u53d1\u73b0Free\u53d8\u5c0f\u4e86\uff0c\u8fd9\u662f\u56e0\u4e3a\u88ab\u6570\u636e\u5e93\u7528\u6389\u4e86\u3002<\/p>\n\n\n\n
    <\/p>\n","protected":false},"excerpt":{"rendered":"
    1 \u4e3a\u4ec0\u4e48\u8981\u5f00\u542f\u5927\u9875 \u5185\u5b58\u8868\u6620\u5c04\u4f18\u5316 \u64cd\u4f5c\u7cfb\u7edf\u7684\u865a\u62df\u5185\u5b58\u7ba1\u7406\uff0c\u6211\u4eec\u6240\u770b\u5230\u7684\u4efb\u4f55\u5730\u5740\u90fd\u662f\u865a\u62df\u5730\u5740\uff0c\u800c\u9875\u8868\u7ef4\u62a4\u4e86\u865a\u62df\u5185\u5b58\u5730\u5740\u5230\u5b9e\u9645\u7269\u7406 …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-244","post","type-post","status-publish","format-standard","hentry","category-22"],"_links":{"self":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts\/244","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/comments?post=244"}],"version-history":[{"count":5,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts\/244\/revisions"}],"predecessor-version":[{"id":281,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/posts\/244\/revisions\/281"}],"wp:attachment":[{"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/media?parent=244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/categories?post=244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yuzikimikage.top\/index.php\/wp-json\/wp\/v2\/tags?post=244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}