\u8981\u7406\u89e3\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\u662f\u5982\u4f55\u9010\u6b65\u300c\u52a3\u5316\u300d\u7684\uff0c\u53ef\u4ee5\u5f9e\u5169\u500b\u6838\u5fc3\u904e\u7a0b\u8457\u624b\uff1a\u5167\u90e8\u5206\u914d\u6548\u7387\u4ee5\u53ca\u6838\u5fc3\u7a7a\u9593\u7ba1\u7406\u3002<\/p>\n

\u5167\u90e8\u788e\u7247\u8207\u5916\u90e8\u788e\u7247<\/h3>\n

\u8a18\u61b6\u9ad4\u5206\u914d\u554f\u984c\u901a\u5e38\u5206\u70ba\u5169\u985e\uff1a<\/p>\n

\n\n\n\n\n<\/colgroup>\n\n\n\n\n

\u788e\u7247\u985e\u578b<\/th>\n	\u7522\u751f\u65b9\u5f0f<\/th>\n	\u7cfb\u7d71\u5f71\u97ff<\/th>\n<\/tr>\n
\u5167\u90e8\u788e\u7247<\/strong><\/td>\n	\u4f60\u5206\u914d\u4e86\u8a18\u61b6\u9ad4\u5340\u584a\uff0c\u4f46\u5be6\u969b\u8cc7\u6599\u6c92\u6709\u586b\u6eff\u6574\u500b\u7a7a\u9593\u3002<\/td>\n	\u5340\u584a\u5167\u591a\u9918\u7684\u7a7a\u9592\u7a7a\u9593\u6703\u88ab\u9592\u7f6e\uff0c\u7121\u6cd5\u4f7f\u7528\u3002<\/td>\n<\/tr>\n
\u5916\u90e8\u788e\u7247<\/strong><\/td>\n	\u4f60\u9577\u6642\u9593\u6301\u7e8c\u5730\u5206\u914d\u8207\u91cb\u653e\u52d5\u614b\u7269\u4ef6\u3002<\/td>\n	\u7e3d\u7a7a\u9592\u8a18\u61b6\u9ad4\u4f9d\u7136\u5f88\u591a\uff0c\u4f46\u7a7a\u9593\u88ab\u4e0d\u53ef\u7528\u7684\u5c0f\u9593\u9699\u5206\u5272\u958b\u4f86\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u5167\u90e8\u788e\u7247\u6d6a\u8cbb\u7684\u662f\u5df2\u5206\u914d\u5340\u584a\u5167\u90e8\u7684\u4f4d\u5143\u7d44\uff1b\u5916\u90e8\u788e\u7247\u5247\u6703\u628a\u7a7a\u9592 RAM \u6253\u6563\u6210\u8a31\u591a\u5fae\u5c0f\u9593\u9699\uff0c\u9032\u800c\u59a8\u7919\u8f03\u5927\u8a18\u61b6\u9ad4\u5340\u584a\u7684\u5206\u914d\u3002<\/p>\n \u9577\u671f\u5feb\u53d6\u4e2d\u7684\u5806\u788e\u7247<\/h3>\n \u9577\u6642\u9593\u904b\u884c\u7684\u61c9\u7528\u7a0b\u5f0f\u6703\u5728\u8a18\u61b6\u9ad4\u5feb\u53d6\u4e2d\u5b58\u653e\u4e0d\u540c\u5927\u5c0f\u7684\u7269\u4ef6\uff0c\u4ee5\u5be6\u73fe\u5feb\u901f\u5b58\u53d6\u3002\u4f60\u53ef\u80fd\u6703\u5c07\u4f7f\u7528\u8005\u5de5\u4f5c\u968e\u6bb5\u3001\u52d5\u614b\u8cc7\u6599\u5eab\u67e5\u8a62\u7d50\u679c\uff0c\u6216 API \u56de\u61c9\u5b58\u653e\u5728 RAM \u4e2d\u3002<\/p>\n \u61c9\u7528\u7a0b\u5f0f\u6703\u4e0d\u65b7\u5efa\u7acb\u548c\u522a\u9664\u9019\u4e9b\u5927\u5c0f\u4e0d\u4e00\u7684\u5feb\u53d6\u7269\u4ef6\u3002\u9019\u6a23\u7684\u6301\u7e8c\u5faa\u74b0\u6703\u628a\u5806\u7a7a\u9593\u5207\u5272\u6210\u8a31\u591a\u96f6\u6563\u7684\u5c0f\u578b\u7a7a\u9592\u5340\u57df\u3002\u7d93\u904e\u6578\u9031\u751a\u81f3\u6578\u6708\u5f8c\uff0c\u5373\u4f7f\u7cfb\u7d71\u4e2d\u4ecd\u7136\u6709\u6578 GB \u53ef\u7528 RAM\uff0c\u7a0b\u5f0f\u4e5f\u53ef\u80fd\u7121\u6cd5\u70ba\u65b0\u7684\u5927\u578b\u7269\u4ef6\u627e\u5230\u4e00\u584a\u9023\u7e8c\u7a7a\u9593\u3002<\/p>\n Linux \u6838\u5fc3\u9801\u9762\u5206\u914d\u5668\u7684\u6a5f\u5236<\/h3>\n \u7576\u61c9\u7528\u7a0b\u5f0f\u8acb\u6c42\u8a18\u61b6\u9ad4\u6642\uff0c\u5925\u4f34\u5206\u914d\u5668\uff08buddy allocator\uff09\u6703\u4f9d\u7167\u7279\u5b9a\u6d41\u7a0b\u904b\u4f5c\uff1a<\/p>\n \n \u6aa2\u67e5\u76ee\u6a19\u968e\u6578\u7a7a\u9592\u93c8\u7d50\u4e32\u5217<\/strong>\uff1a\u5148\u5728\u8207\u6240\u9700\u5927\u5c0f\u5b8c\u5168\u5339\u914d\u7684 order \u7a7a\u9592\u93c8\u7d50\u4e32\u5217\u4e2d\u67e5\u627e\u3002\u82e5\u5b58\u5728\u5408\u9069\u5340\u584a\uff0c\u7cfb\u7d71\u6703\u7acb\u5373\u5b8c\u6210\u5206\u914d\u3002<\/li>\n \u6aa2\u67e5\u66f4\u9ad8\u968e\u93c8\u7d50\u4e32\u5217<\/strong>\uff1a\u5982\u679c\u76ee\u6a19 order \u93c8\u7d50\u4e32\u5217\u70ba\u7a7a\uff0c\u5c31\u7e7c\u7e8c\u67e5\u627e\u66f4\u5927\u7684\u7a7a\u9592\u5340\u584a\u93c8\u7d50\u4e32\u5217\u3002<\/li>\n \u905e\u8ff4\u62c6\u5206<\/strong>\uff1a\u5c07\u8f03\u5927\u7684\u5340\u584a\u62c6\u5206\u70ba\u5169\u500b\u5927\u5c0f\u76f8\u7b49\u7684\u300c\u5925\u4f34\u5340\u584a\uff08buddies\uff09\u300d\u3002\u6838\u5fc3\u4f7f\u7528\u5176\u4e2d\u4e00\u534a\u6eff\u8db3\u8acb\u6c42\uff0c\u4e26\u5c07\u5269\u9918\u4e00\u534a\u653e\u56de\u8f03\u4f4e order \u7684\u7a7a\u9592\u93c8\u7d50\u4e32\u5217\u3002<\/li>\n<\/ol>\n \u9ad8\u8ca0\u8f09\u4f3a\u670d\u5668\u6703\u4e0d\u65b7\u62c6\u5206\u9019\u4e9b\u8a18\u61b6\u9ad4\u5340\u584a\uff0c\u96a8\u8457\u904b\u884c\u6642\u9593\u589e\u9577\uff0c\u8a18\u61b6\u9ad4\u788e\u7247\u5316\u6703\u9032\u4e00\u6b65\u52a0\u5287\u3002<\/p>\n \u8a18\u61b6\u9ad4\u788e\u7247\u5316\u5c0d\u4f3a\u670d\u5668\u7a69\u5b9a\u6027\u7684\u5f71\u97ff<\/strong><\/h2>\n \u56b4\u91cd\u7684\u8a18\u61b6\u9ad4\u788e\u7247\u5316\u6703\u5728\u4e0d\u77e5\u4e0d\u89ba\u4e2d\u6301\u7e8c\u524a\u5f31\u7cfb\u7d71\u6548\u80fd\u3002\u4f60\u4e5f\u8a31\u6703\u770b\u5230\u7e3d\u7a7a\u9592 RAM \u4f9d\u7136\u5f88\u9ad8\uff0c\u4f46\u4f3a\u670d\u5668\u5be6\u969b\u4e0a\u5df2\u7d93\u51fa\u73fe\u96b1\u85cf\u7684\u6548\u80fd\u74f6\u9838\u8207\u904b\u884c\u4e0d\u7a69\u5b9a\u554f\u984c\u3002<\/p>\n \u5206\u914d\u8b8a\u6162\u8207 RAM \u6d6a\u8cbb<\/h3>\n \u7576\u8a18\u61b6\u9ad4\u88ab\u5206\u88c2\u6210\u5927\u91cf\u7d30\u5c0f\u4e14\u4e0d\u9023\u7e8c\u7684\u5340\u584a\u6642\uff0c\u4f3a\u670d\u5668\u5c31\u6703\u5931\u53bb\u9ad8\u6548\u7387\u3002Linux \u6838\u5fc3\u5fc5\u9808\u6383\u63cf\u591a\u500b\u7a7a\u9592\u93c8\u7d50\u4e32\u5217\uff0c\u624d\u80fd\u70ba\u65b0\u884c\u7a0b\u627e\u5230\u5408\u9069\u7684\u5340\u584a\u3002\u9019\u7a2e\u984d\u5916\u641c\u5c0b\u6703\u5ef6\u9577\u5206\u914d\u6642\u9593\uff0c\u4e26\u63d0\u9ad8\u61c9\u7528\u7a0b\u5f0f\u5ef6\u9072\u3002<\/p>\n \u95dc\u9375\u7d50\u8ad6\uff1a<\/strong>\u5df2\u5360\u7528\u9801\u9762\u4e4b\u9593\u7684\u4e0d\u53ef\u7528\u9593\u9699\u6703\u5f62\u6210\u300c\u64f1\u6dfa\u5bb9\u91cf\u300d\u3002\u7cfb\u7d71\u7121\u6cd5\u628a\u9019\u4e9b\u5206\u6563\u7684\u5c0f\u9593\u9699\u91cd\u65b0\u62fc\u63a5\u8d77\u4f86\u6eff\u8db3\u8f03\u5927\u7684\u5206\u914d\u8acb\u6c42\uff0c\u56e0\u6b64\u53ef\u5be6\u969b\u5229\u7528\u7684 RAM \u5bb9\u91cf\u6703\u986f\u8457\u4e0b\u964d\u3002<\/p><\/blockquote>\n \u4e0b\u8868\u5c55\u793a\u4e86\u8a18\u61b6\u9ad4\u788e\u7247\u5316\u5982\u4f55\u5f71\u97ff\u5206\u914d\u901f\u5ea6\u8207 RAM \u5229\u7528\u6548\u7387\uff1a<\/p>\n \n\n\n\n\n\n<\/colgroup>\n\n\n\n\n\n \u72c0\u614b<\/th>\n \u5206\u914d\u641c\u5c0b\u6642\u9593<\/th>\n \u53ef\u7528\u5bb9\u91cf<\/th>\n \u6574\u9ad4\u4f3a\u670d\u5668\u6548\u7387<\/th>\n<\/tr>\n \u9023\u7e8c\u8a18\u61b6\u9ad4<\/strong><\/td>\n \u5feb\uff08\u76f4\u63a5\u547d\u4e2d Buddy \u93c8\u7d50\u4e32\u5217\uff09<\/td>\n \u9ad8\uff0895\u201399%\uff09<\/td>\n \u6700\u4f73<\/td>\n<\/tr>\n \u8f15\u5ea6\u788e\u7247\u5316<\/strong><\/td>\n \u4e2d\u7b49\uff08\u9700\u6383\u63cf\u591a\u500b\u93c8\u7d50\u4e32\u5217\uff09<\/td>\n \u4e2d\u7b49\uff0870\u201385%\uff09<\/td>\n \u53ef\u63a5\u53d7<\/td>\n<\/tr>\n \u56b4\u91cd\u788e\u7247\u5316<\/strong><\/td>\n \u6162\uff08\u6df1\u5ea6\u904d\u6b77\uff09<\/td>\n \u4f4e\uff08\u4f4e\u65bc 50%\uff09<\/td>\n \u8f03\u5dee<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u6838\u5fc3\u8a18\u61b6\u9ad4\u58d3\u7e2e\u5f15\u767c\u7684\u5ef6\u9072\u5c16\u5cf0<\/h3>\n \u7576\u5925\u4f34\u5206\u914d\u5668\u7121\u6cd5\u627e\u5230\u9023\u7e8c\u7a7a\u9592\u9801\u9762\u6642\uff0cLinux \u6838\u5fc3\u6703\u89f8\u767c\u76f4\u63a5\u8a18\u61b6\u9ad4\u58d3\u7e2e\uff08direct memory compaction\uff09<\/strong>\u3002\u6838\u5fc3\u6703\u5617\u8a66\u5728\u5be6\u9ad4 RAM \u4e2d\u79fb\u52d5\u5df2\u5206\u914d\u9801\u9762\uff0c\u4ee5\u6574\u7406\u51fa\u66f4\u5927\u7684\u9023\u7e8c\u8a18\u61b6\u9ad4\u5340\u584a\u3002<\/p>\n [ \u5df2\u5206\u914d\u9801\u9762 ] [ \u7a7a\u9592\u7a7a\u9593 ] [ \u5df2\u5206\u914d\u9801\u9762 ] [ \u7a7a\u9592\u7a7a\u9593 ]\r\n \u2502 \u2502\r\n \u25bc\uff08\u6838\u5fc3\u58d3\u7e2e\u904e\u7a0b\uff09 \u25bc\r\n[ \u5df2\u5206\u914d\u9801\u9762 ] [ \u5df2\u5206\u914d\u9801\u9762 ] [ \u7a7a\u9592\u7a7a\u9593 ] [ \u7a7a\u9592\u7a7a\u9593 ]<\/code><\/pre>\n \u9019\u4e00\u58d3\u7e2e\u904e\u7a0b\u6703\u6d88\u8017\u5927\u91cf CPU \u8cc7\u6e90\uff0c\u4e26\u5e72\u64fe\u6b63\u5e38\u904b\u4f5c\uff1a<\/p>\n \n \u9801\u9762\u56de\u6536<\/strong>\uff1a\u6838\u5fc3\u6383\u63cf\u6d3b\u8e8d\u8a18\u61b6\u9ad4\uff0c\u5c0b\u627e\u53ef\u9077\u79fb\u9801\u9762\u3002<\/li>\n \u540c\u6b65\u66ab\u505c<\/strong>\uff1a\u5728\u79fb\u52d5\u9801\u9762\u6642\uff0c\u6838\u5fc3\u6703\u66ab\u505c\u4f60\u7684\u61c9\u7528\u7a0b\u5f0f\u57f7\u884c\u7dd2\u3002<\/li>\n \u5feb\u53d6\u5931\u6548<\/strong>\uff1a\u983b\u7e41\u7684\u9801\u9762\u79fb\u52d5\u6703\u6c96\u5237 CPU \u5feb\u53d6\u4e26\u964d\u4f4e\u5b58\u53d6\u901f\u5ea6\u3002<\/li>\n<\/ul>\n \u9019\u4e9b\u6838\u5fc3\u884c\u70ba\u6703\u5728\u751f\u7522\u74b0\u5883\u61c9\u7528\u4e2d\u9020\u6210\u56b4\u91cd\u7684\u5c3e\u7aef\u5ef6\u9072\u5c16\u5cf0\u3002\u4f60\u7684 Web \u670d\u52d9\u53ef\u80fd\u6703\u5728\u6fc0\u70c8\u58d3\u7e2e\u9031\u671f\u4e2d\uff0c\u5f9e\u539f\u672c\u6beb\u79d2\u7d1a\u56de\u61c9\u9661\u7136\u4e0a\u5347\u5230\u79d2\u7d1a\u3002<\/p>\n \u4f4e\u9918\u88d5\u7cfb\u7d71\u4e2d\u7684 OOM \u5d29\u6f70<\/h3>\n \u5728\u8a18\u61b6\u9ad4\u9918\u88d5\u6709\u9650\u7684\u7cfb\u7d71\u4e2d\uff0c\u56b4\u91cd\u788e\u7247\u5316\u53ef\u80fd\u5f15\u767c\u707d\u96e3\u6027\u6545\u969c\u3002\u4f60\u53ef\u80fd\u5728\u76e3\u63a7\u9762\u677f\u4e2d\u770b\u5230\u4f3a\u670d\u5668\u4ecd\u6709 30% \u751a\u81f3\u66f4\u591a\u7a7a\u9592 RAM\uff0c\u4f46\u61c9\u7528\u7a0b\u5f0f\u537b\u7a81\u7136\u56e0 Out-Of-Memory\uff08OOM\uff09\u7570\u5e38\u800c\u5d29\u6f70\u3002<\/p>\n \u9019\u662f\u56e0\u70ba\u61c9\u7528\u7a0b\u5f0f\u8acb\u6c42\u4e86\u4e00\u500b\u9ad8\u968e\u9023\u7e8c\u5340\u584a\uff0c\u4f8b\u5982 order-3\uff0832KB\uff09\u6216 order-4\uff0864KB\uff09\u9801\u6846\u3002\u6b64\u6642\u6838\u5fc3\u6703\u5617\u8a66\u76f4\u63a5\u58d3\u7e2e\uff0c\u4f46\u6d3b\u8e8d\u4e14\u88ab\u56fa\u5b9a\uff08pinned\uff09\u7684\u5340\u584a\u6703\u963b\u6b62\u9801\u9762\u9077\u79fb\u3002<\/p>\n \u5982\u679c\u58d3\u7e2e\u4ecd\u7136\u7121\u6cd5\u6574\u7406\u51fa\u9023\u7e8c\u7a7a\u9593\uff0cLinux \u6838\u5fc3\u5c31\u6703\u89f8\u767c OOM killer\u3002OOM killer \u6703\u9078\u64c7\u4e26\u7d42\u6b62\u95dc\u9375\u61c9\u7528\u7a0b\u5f0f\u884c\u7a0b\u4ee5\u56de\u6536\u7cfb\u7d71\u8cc7\u6e90\uff0c\u5f9e\u800c\u5c0e\u81f4\u6beb\u7121\u9810\u8b66\u7684\u670d\u52d9\u4e2d\u65b7\u3002<\/p>\n \u5728\u751f\u7522\u74b0\u5883\u4e2d\u8a3a\u65b7\u8a18\u61b6\u9ad4\u788e\u7247\u5316<\/strong><\/h2>\n \u4f60\u5fc5\u9808\u5728\u61c9\u7528\u7a0b\u5f0f\u5d29\u6f70\u4e4b\u524d\u8b58\u5225\u4f3a\u670d\u5668\u554f\u984c\u3002Linux \u539f\u751f\u547d\u4ee4\u53ef\u4ee5\u5e6b\u52a9\u4f60\u6aa2\u67e5\u5be6\u9ad4\u8a18\u61b6\u9ad4\u914d\u7f6e\uff0c\u4e26\u5373\u6642\u5075\u6e2c\u8a18\u61b6\u9ad4\u788e\u7247\u5316\u3002<\/p>\n \u6aa2\u67e5 Proc Buddyinfo \u8207 Meminfo<\/h3>\n \u4f60\u53ef\u4ee5\u8b80\u53d6 \/proc\/buddyinfo<\/code> \u6a94\u6848\u4f86\u67e5\u770b\u53ef\u7528\u7684\u9023\u7e8c\u9801\u9762\u5340\u584a\u3002\u8a72\u6a94\u6848\u6703\u986f\u793a\u5404\u500b\u8a18\u61b6\u9ad4\u5340\u57df\u4e2d\u6bcf\u500b order \u7684\u7a7a\u9592\u5340\u584a\u6578\u91cf\u3002\u5982\u679c\u4f4e\u968e\u6578\u91cf\u5f88\u591a\u800c\u9ad8\u968e\u70ba 0\uff0c\u5c31\u4ee3\u8868\u5be6\u9ad4\u8a18\u61b6\u9ad4\u5df2\u7d93\u51fa\u73fe\u56b4\u91cd\u788e\u7247\u5316\u3002<\/p>\n cat \/proc\/buddyinfo<\/code><\/pre>\n \u63a5\u8457\uff0c\u67e5\u770b \/proc\/meminfo<\/code> \u4ee5\u6aa2\u67e5\u7e3d\u5bb9\u91cf\u3002\u91cd\u9ede\u95dc\u6ce8 MemAvailable<\/code> \u548c SUnreclaim<\/code>\u3002\u5982\u679c\u7a7a\u9592 RAM \u8207\u53ef\u5be6\u969b\u4f7f\u7528\u7a7a\u9593\u4e4b\u9593\u5b58\u5728\u8f03\u5927\u5dee\u8ddd\uff0c\u5c31\u8868\u793a\u5206\u6563\u7684\u8a18\u61b6\u9ad4\u9593\u9699\u6b63\u5728\u963b\u7919\u5206\u914d\u8acb\u6c42\u3002<\/p>\n \u76e3\u63a7\u9801\u9762\u5206\u914d\u5931\u6557<\/h3>\n Linux \u6838\u5fc3\u6703\u76f4\u63a5\u5c07\u5206\u914d\u554f\u984c\u8a18\u9304\u5230\u7cfb\u7d71\u65e5\u8a8c\u4e2d\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 dmesg<\/code> \u6307\u4ee4\u641c\u5c0b page allocation failure \u8b66\u544a\uff1a<\/p>\n dmesg -T | grep -i \"page allocation failure\"<\/code><\/pre>\n \u4e3b\u52d5\u63d0\u793a\uff1a<\/strong>\u9019\u4e9b\u65e5\u8a8c\u9805\u6703\u986f\u793a\u5931\u6557\u7684\u5177\u9ad4\u5206\u914d order\u3002\u5b83\u5011\u80fd\u5920\u8b49\u660e\uff1a\u5373\u4f7f\u7e3d RAM \u770b\u8d77\u4f86\u5145\u8db3\uff0c\u7cfb\u7d71\u4e5f\u7f3a\u4e4f\u8db3\u5920\u7684\u9023\u7e8c\u8a18\u61b6\u9ad4\u5340\u584a\u3002<\/p><\/blockquote>\n \u900f\u904e Vmstat \u548c Sar \u8ffd\u8e64\u7cfb\u7d71\u8da8\u52e2<\/h3>\n \u4f60\u53ef\u4ee5\u900f\u904e\u8ffd\u8e64\u6838\u5fc3\u8a18\u61b6\u9ad4\u6307\u6a19\u4f86\u76e3\u63a7\u9577\u671f\u7cfb\u7d71\u5065\u5eb7\u72c0\u6cc1\u3002\/proc\/vmstat<\/code> \u6a94\u6848\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u8a08\u6578\u5668\u7d71\u8a08\u8cc7\u8a0a\uff0c\u53ef\u7528\u65bc\u8b58\u5225\u56b4\u91cd\u7684\u58d3\u7e2e\u6d3b\u52d5\u8207\u5206\u914d\u5ef6\u9072\u3002<\/p>\n \u4f60\u61c9\u91cd\u9ede\u76e3\u63a7\u4ee5\u4e0b vmstat<\/code> \u6307\u6a19\uff0c\u4ee5\u767c\u73fe\u4e0d\u65b7\u52a0\u5287\u7684\u6548\u80fd\u8da8\u52e2\uff1a<\/p>\n \n\n\n\n<\/colgroup>\n\n\n\n\n\n\n\n\n\n \u6307\u6a19\u540d\u7a31<\/th>\n \u4f5c\u7528 \/ \u8ffd\u8e64\u6d3b\u52d5<\/th>\n<\/tr>\n compact_stall<\/code><\/td>\n \u8a18\u9304\u884c\u7a0b\u56e0\u76f4\u63a5\u58d3\u7e2e\u800c\u88ab\u963b\u585e\u7684\u6b21\u6578\u3002<\/td>\n<\/tr>\n pgscan_direct<\/code><\/td>\n \u7d71\u8a08\u884c\u7a0b\u5728\u76f4\u63a5\u56de\u6536\u904e\u7a0b\u4e2d\u540c\u6b65\u6383\u63cf\u7684\u9801\u9762\u6578\u91cf\u3002<\/td>\n<\/tr>\n pgsteal_direct<\/code><\/td>\n \u7d71\u8a08\u900f\u904e\u76f4\u63a5\u56de\u6536\u6210\u529f\u91cb\u653e\u7684\u9801\u9762\u6578\u91cf\u3002<\/td>\n<\/tr>\n allocstall_normal<\/code><\/td>\n \u7d71\u8a08\u767c\u751f\u5728 Normal \u8a18\u61b6\u9ad4\u5340\u57df\u4e2d\u7684\u76f4\u63a5\u56de\u6536\u9032\u5165\u6b21\u6578\u3002<\/td>\n<\/tr>\n allocstall_dma32<\/code><\/td>\n \u7d71\u8a08\u767c\u751f\u5728 DMA32 \u8a18\u61b6\u9ad4\u5340\u57df\u4e2d\u7684\u76f4\u63a5\u56de\u6536\u9032\u5165\u6b21\u6578\u3002<\/td>\n<\/tr>\n allocstall_dma<\/code><\/td>\n \u7d71\u8a08\u767c\u751f\u5728 DMA \u8a18\u61b6\u9ad4\u5340\u57df\u4e2d\u7684\u76f4\u63a5\u56de\u6536\u9032\u5165\u6b21\u6578\u3002<\/td>\n<\/tr>\n allocstall_movable<\/code><\/td>\n \u7d71\u8a08\u767c\u751f\u5728 Movable \u8a18\u61b6\u9ad4\u5340\u57df\u4e2d\u7684\u76f4\u63a5\u56de\u6536\u9032\u5165\u6b21\u6578\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u5982\u679c\u9019\u4e9b\u8a08\u6578\u5668\u6301\u7e8c\u4e0a\u5347\uff0c\u5c31\u8868\u793a\u6838\u5fc3\u6b63\u5728\u70ba\u6e4a\u51fa\u7a7a\u9592\u9801\u9762\u800c\u4ed8\u51fa\u904e\u9ad8\u4ee3\u50f9\u3002<\/p>\n \u7de9\u89e3\u8207\u8a18\u61b6\u9ad4\u7ba1\u7406\u7b56\u7565<\/strong><\/h2>\n \u4f60\u53ef\u4ee5\u4e3b\u52d5\u7ba1\u7406\u4f3a\u670d\u5668\u8a18\u61b6\u9ad4\uff0c\u4ee5\u9632\u6b62\u56b4\u91cd\u7684\u6548\u80fd\u9000\u5316\u3002\u7121\u8ad6\u662f\u5728\u6838\u5fc3\u5c64\u9084\u662f\u61c9\u7528\u5c64\uff0c\u63a1\u7528\u6709\u6548\u7684\u7de9\u89e3\u624b\u6bb5\u90fd\u80fd\u5e6b\u52a9\u7cfb\u7d71\u7dad\u6301\u9577\u671f\u53ef\u7528\u6027\u3002<\/p>\n \u8abf\u6821\u6838\u5fc3\u58d3\u7e2e\u53c3\u6578<\/h3>\n Linux \u6838\u5fc3\u5728 \/proc\/sys\/vm\/<\/code> \u4e0b\u63d0\u4f9b\u4e86\u591a\u500b\u8a2d\u5b9a\u9805\uff0c\u7528\u65bc\u7ba1\u7406\u9801\u9762\u914d\u7f6e\u6548\u7387\u3002\u4f60\u53ef\u4ee5\u5728\u4e0d\u91cd\u65b0\u555f\u52d5\u751f\u7522\u7bc0\u9ede\u7684\u524d\u63d0\u4e0b\u5373\u6642\u8abf\u6574\u9019\u4e9b\u53c3\u6578\u3002<\/p>\n # \u67e5\u770b\u7576\u524d\u6838\u5fc3\u58d3\u7e2e\u8a2d\u5b9a\r\nsysctl vm.compaction_proactiveness vm.extfrag_threshold vm.min_free_kbytes<\/code><\/pre>\n \u4f60\u53ef\u4ee5\u900f\u904e\u4ee5\u4e0b\u4e09\u500b\u4e3b\u8981\u53c3\u6578\u4f86\u512a\u5316\u6838\u5fc3\u80cc\u666f\u884c\u70ba\uff1a<\/p>\n \n vm.compaction_proactiveness<\/code>\uff1a\u6b64\u53c3\u6578\u63a7\u5236\u6838\u5fc3\u5728\u5206\u914d\u8acb\u6c42\u5931\u6557\u524d\uff0c\u6703\u591a\u7a4d\u6975\u5730\u9810\u5148\u6574\u7406\u5be6\u9ad4\u9801\u9762\u3002\u63d0\u9ad8 vm.compaction_proactiveness<\/code> \u7684\u503c\uff0c\u6703\u4fc3\u4f7f\u6838\u5fc3\u66f4\u4e3b\u52d5\u5730\u9032\u884c\u8a18\u61b6\u9ad4\u58d3\u7e2e\uff0c\u4ee5\u7dad\u6301\u9023\u7e8c\u8a18\u61b6\u9ad4\u53ef\u7528\u6027\u3002\u4e0d\u904e\uff0c\u7531\u65bc\u58d3\u7e2e\u672c\u8eab\u6703\u5e36\u4f86\u57f7\u884c\u671f\u958b\u92b7\uff0c\u66f4\u9ad8\u7684\u8a2d\u5b9a\u4e5f\u6703\u589e\u52a0\u7cfb\u7d71\u8ca0\u64d4\uff1b\u800c\u5c07\u5176\u8a2d\u70ba 0 \u5247\u8868\u793a\u5b8c\u5168\u95dc\u9589\u4e3b\u52d5\u58d3\u7e2e\u3002\u7cfb\u7d71\u4e2d\u6703\u6709\u4e00\u500b\u5c08\u9580\u7684 kcompactd<\/code> \u57f7\u884c\u7dd2\u5728\u904b\u884c\u671f\u9593\u6301\u7e8c\u5de5\u4f5c\uff0c\u6d3b\u8e8d\u6642\u6700\u591a\u53ef\u80fd\u5360\u7528\u55ae\u500b CPU \u6838\u5fc3\u7684 100%\u3002<\/li>\n vm.extfrag_threshold<\/code>\uff1a\u6b64\u53c3\u6578\u6c7a\u5b9a\u6838\u5fc3\u4f55\u6642\u5f9e\u9801\u9762\u56de\u6536\u5207\u63db\u5230\u76f4\u63a5\u58d3\u7e2e\u3002\u95be\u503c\u8d8a\u9ad8\uff0c\u8d8a\u50be\u5411\u65bc\u76f4\u63a5\u5617\u8a66\u5206\u914d\u9801\u9762\uff1b\u95be\u503c\u8d8a\u4f4e\uff0c\u5247\u8d8a\u65e9\u89f8\u767c\u58d3\u7e2e\u3002<\/li>\n vm.min_free_kbytes<\/code>\uff1a\u63d0\u9ad8\u6b64\u503c\u6703\u8feb\u4f7f\u6838\u5fc3\u4fdd\u7559\u66f4\u5927\u7684\u7a7a\u9592\u9801\u9762\u5132\u5099\u3002\u9019\u6a23\u7684\u5132\u5099\u53ef\u5728\u7a81\u767c\u8a18\u61b6\u9ad4\u4f7f\u7528\u9ad8\u5cf0\u6642\uff0c\u70ba\u5925\u4f34\u5206\u914d\u5668\u63d0\u4f9b\u7dca\u6025\u9918\u88d5\u3002<\/li>\n<\/ul>\n \u8a2d\u5b9a\u5efa\u8b70\uff1a<\/strong>\u5c0d\u65bc\u5ef6\u9072\u654f\u611f\u578b\u8cc7\u6599\u5eab\u7bc0\u9ede\uff0c\u53ef\u5c07 vm.compaction_proactiveness<\/code> \u8a2d\u70ba 20 \u5230 50 \u7684\u4e2d\u7b49\u503c\u3002\u9019\u6a23\u65e2\u80fd\u964d\u4f4e\u788e\u7247\u5316\u98a8\u96aa\uff0c\u4e5f\u80fd\u907f\u514d kcompactd<\/code> \u80cc\u666f\u57f7\u884c\u7dd2\u5728\u696d\u52d9\u9ad8\u5cf0\u671f\u7368\u5360\u6574\u500b CPU \u6838\u5fc3\u3002<\/p><\/blockquote>\n \u4f7f\u7528\u81ea\u8a02\u8a18\u61b6\u9ad4\u5206\u914d\u5668<\/h3>\n \u9810\u8a2d\u7684\u7cfb\u7d71\u5206\u914d\u51fd\u5f0f\u5eab\uff08\u5982\u6a19\u6e96 glibc malloc<\/code>\uff09\u5728\u9762\u5c0d\u9ad8\u983b\u7387\u3001\u9577\u6642\u9593\u904b\u884c\u7684\u5206\u914d\u6a21\u5f0f\u6642\uff0c\u5f80\u5f80\u5bb9\u6613\u7522\u751f\u788e\u7247\u5316\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528\u66f4\u73fe\u4ee3\u3001\u66f4\u504f\u5411\u6548\u80fd\u512a\u5316\u7684\u5206\u914d\u5668\u4f86\u53d6\u4ee3\u9810\u8a2d\u5be6\u4f5c\u3002<\/p>\n \n\n\n\n\n<\/colgroup>\n\n\n\n\n\n \u5206\u914d\u5668\u540d\u7a31<\/th>\n \u4e3b\u8981\u8a2d\u8a08\u7b56\u7565<\/th>\n \u95dc\u9375\u67b6\u69cb\u512a\u52e2<\/th>\n<\/tr>\n glibc malloc<\/strong><\/td>\n \u901a\u7528\u578b\u5806\u7ba1\u7406<\/td>\n \u6a19\u6e96\u9810\u8a2d\u5be6\u4f5c\uff0c\u4f46\u9577\u671f\u904b\u884c\u5f8c\u5bb9\u6613\u51fa\u73fe\u8f03\u56b4\u91cd\u7684\u8a18\u61b6\u9ad4\u788e\u7247\u5316\u3002<\/td>\n<\/tr>\n jemalloc<\/strong><\/td>\n \u57fa\u65bc arena \u7684\u5206\u914d\u6a5f\u5236\u8207\u57f7\u884c\u7dd2\u5feb\u53d6<\/td>\n \u53ef\u6e1b\u5c11\u5206\u6563\u5206\u914d\uff0c\u4e26\u5c07\u4e0d\u518d\u9700\u8981\u7684\u9801\u9762\u6b78\u9084\u7d66\u6838\u5fc3\u3002<\/td>\n<\/tr>\n tcmalloc<\/strong><\/td>\n \u57f7\u884c\u7dd2\u5feb\u53d6\u578b malloc<\/td>\n \u5229\u7528\u57f7\u884c\u7dd2\u672c\u5730\u5feb\u53d6\u6e1b\u5c11\u9396\u7af6\u722d\uff0c\u4e26\u4fdd\u6301\u66f4\u5747\u52fb\u7684\u8a18\u61b6\u9ad4\u5340\u584a\u5927\u5c0f\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n \u9019\u4e9b\u5c08\u7528\u5206\u914d\u5668\u6703\u5c07\u8a18\u61b6\u9ad4\u5283\u5206\u70ba\u56fa\u5b9a\u5927\u5c0f\u7684 bin\uff0c\u4e26\u70ba\u4e0d\u540c CPU \u57f7\u884c\u7dd2\u5206\u914d\u7368\u7acb arena\u3002\u4f60\u53ef\u4ee5\u900f\u904e LD_PRELOAD<\/code> \u74b0\u5883\u8b8a\u6578\uff0c\u8f15\u9b06\u5c07 jemalloc<\/code> \u6216 tcmalloc<\/code> \u6574\u5408\u5230\u61c9\u7528\u7a0b\u5f0f\u4e2d\uff1a<\/p>\n # \u4f7f\u7528 jemalloc \u4f5c\u70ba\u5e95\u5c64\u5206\u914d\u5668\u555f\u52d5\u61c9\u7528\u7a0b\u5f0f\r\nLD_PRELOAD=\/usr\/lib\/x86_64-linux-gnu\/libjemalloc.so.2 .\/your_server_binary<\/code><\/pre>\n \u61c9\u7528\u5c64\u8a18\u61b6\u9ad4\u6c60\u5be6\u52d9<\/h3>\n \u4f60\u53ef\u4ee5\u900f\u904e\u5728\u61c9\u7528\u7a0b\u5f0f\u7a0b\u5f0f\u78bc\u4e2d\u5efa\u7acb\u81ea\u8a02\u8a18\u61b6\u9ad4\u6c60\uff0c\u6d88\u9664\u52d5\u614b\u5806\u5206\u914d\u7684\u984d\u5916\u958b\u92b7\u3002\u8a18\u61b6\u9ad4\u6c60\u5141\u8a31\u670d\u52d9\u91cd\u8907\u4f7f\u7528\u56fa\u5b9a\u5927\u5c0f\u7684\u69fd\u4f4d\uff0c\u800c\u4e0d\u662f\u53cd\u8986\u547c\u53eb\u52d5\u614b\u6838\u5fc3\u5206\u914d\u3002<\/p>\n +--------------------------------------------------------+\r\n| \u8a18\u61b6\u9ad4\u6c60 |\r\n| +--------------+ +--------------+ +--------------+ |\r\n| | \u69fd\u4f4d 1\uff08\u7a7a\u9592\uff09| | \u69fd\u4f4d 2\uff08\u5360\u7528\uff09| | \u69fd\u4f4d 3\uff08\u7a7a\u9592\uff09| |\r\n| +--------------+ +--------------+ +--------------+ |\r\n+--------------------------------------------------------+<\/code><\/pre>\n \u4f60\u53ef\u4ee5\u63a1\u7528\u4ee5\u4e0b\u95dc\u9375\u61c9\u7528\u6a21\u5f0f\uff0c\u4ee5\u7dad\u6301\u7a69\u5b9a\u4e00\u81f4\u7684\u57f7\u884c\u6548\u80fd\uff1a<\/p>\n \n \u7269\u4ef6\u91cd\u7528\u6c60<\/strong>\uff1a\u5728\u4f3a\u670d\u5668\u521d\u59cb\u5316\u968e\u6bb5\u9810\u5148\u5206\u914d\u5927\u578b\u9663\u5217\u7de9\u885d\u5340\u3002\u5c07\u53ef\u8b8a\u8cc7\u6599\u5beb\u5165\u9810\u5206\u914d\u69fd\u4f4d\uff0c\u4e26\u5728\u5de5\u4f5c\u57f7\u884c\u7dd2\u8655\u7406\u5b8c\u6210\u5f8c\u628a\u69fd\u4f4d\u6b78\u9084\u6c60\u4e2d\u3002<\/li>\n Slab \u5206\u914d\u5668<\/strong>\uff1a\u5c07\u5c0f\u578b\u3001\u540c\u69cb\u7684\u8cc7\u6599\u7d50\u69cb\u7d44\u7e54\u5230\u7d71\u4e00\u4e14\u9023\u7e8c\u7684\u5340\u584a\u4e2d\uff0c\u5373 slab\u3002\u61c9\u7528\u7a0b\u5f0f\u53ef\u4ee5\u6574\u584a\u91cb\u653e slab\uff0c\u5f9e\u800c\u907f\u514d\u96f6\u6563\u9801\u9762\u9593\u9699\u3002<\/li>\n \u74b0\u5f62\u7de9\u885d\u5340<\/strong>\uff1a\u5c0d\u65bc\u4e32\u6d41\u5f0f\u5de5\u4f5c\u8ca0\u8f09\u6216\u50b3\u5165 socket \u5c01\u5305\uff0c\u4f7f\u7528\u56fa\u5b9a\u5927\u5c0f\u7684\u5faa\u74b0\u7de9\u885d\u5340\u3002\u74b0\u5f62\u7de9\u885d\u5340\u53ef\u4ee5\u8b93\u8a18\u61b6\u9ad4\u4f7f\u7528\u4fdd\u6301\u53ef\u9810\u6e2c\u4e14\u6709\u4e0a\u9650\u3002<\/li>\n<\/ol>\n \u4f7f\u7528\u8a18\u61b6\u9ad4\u6c60\u80fd\u5920\u8b93\u4f3a\u670d\u5668\u4f4d\u5740\u7a7a\u9593\u4fdd\u6301\u7a69\u5b9a\uff0c\u4e26\u6e1b\u5c11\u5728\u6301\u7e8c\u6578\u6708\u904b\u884c\u671f\u9593\u4e0d\u53ef\u9810\u6e2c\u7684\u6838\u5fc3\u64cd\u4f5c\u3002<\/p>\n \n <\/div>\n<\/div>\n \u82e5\u653e\u4efb\u4e0d\u7ba1\uff0c\u8a18\u61b6\u9ad4\u788e\u7247\u5316\u6703\u6084\u7136\u4fb5\u8755\u4f3a\u670d\u5668\u7684\u53ef\u7528\u6027\u3001\u7cfb\u7d71\u541e\u5410\u80fd\u529b\u8207\u904b\u884c\u53ef\u9760\u6027\u3002\u4f60\u5fc5\u9808\u4e3b\u52d5\u9632\u7bc4\u9019\u7a2e\u96b1\u853d\u7684\u6545\u969c\u6a21\u5f0f\u3002<\/p>\n \u4f60\u53ef\u4ee5\u900f\u904e\u4e09\u9805\u95dc\u9375\u5be6\u52d9\u4f86\u4fdd\u8b77\u7cfb\u7d71\uff1a<\/p>\n \n \u4f7f\u7528 Linux \u539f\u751f\u8a3a\u65b7\u5de5\u5177\u6301\u7e8c\u8ffd\u8e64\u8a18\u61b6\u9ad4\u9023\u7e8c\u6027\u3002<\/li>\n \u7d30\u7dfb\u8abf\u6821\u6838\u5fc3\u58d3\u7e2e\u53c3\u6578\uff0c\u5728\u80cc\u666f\u6574\u7406\u958b\u92b7\u8207\u696d\u52d9\u6548\u80fd\u4e4b\u9593\u53d6\u5f97\u5e73\u8861\u3002<\/li>\n \u91dd\u5c0d\u9ad8\u983b\u5206\u914d\u578b\u5de5\u4f5c\u8ca0\u8f09\uff0c\u90e8\u7f72\u5982 jemalloc \u6216 tcmalloc \u4e4b\u985e\u7684\u5c08\u7528\u5206\u914d\u5668\u3002<\/li>\n<\/ul>\n \u5e38\u898b\u554f\u984c<\/strong><\/h2>\n \u5982\u4f55\u5feb\u901f\u6aa2\u6e2c\u751f\u7522\u74b0\u5883\u4f3a\u670d\u5668\u4e0a\u7684\u8a18\u61b6\u9ad4\u788e\u7247\u5316\uff1f<\/h3>\n \u4f60\u53ef\u4ee5\u4f7f\u7528 Linux \u539f\u751f\u547d\u4ee4\u6aa2\u67e5 \/proc\/buddyinfo<\/code> \u6a94\u6848\uff0c\u91cd\u9ede\u95dc\u6ce8\u9ad8\u968e\u8a18\u61b6\u9ad4\u5217\u8868\u4e2d\u7684\u6578\u503c\u662f\u5426\u504f\u5c0f\u3002\u6216\u8005\uff0c\u4e5f\u53ef\u4ee5\u900f\u904e dmesg<\/code> \u76e3\u63a7\u7cfb\u7d71\u65e5\u8a8c\u4e2d\u7684 page allocation failure \u8b66\u544a\u3002\u9019\u4e9b\u6307\u6a19\u90fd\u80fd\u8fc5\u901f\u78ba\u8a8d\u5be6\u9ad4\u4f4d\u5740\u7a7a\u9593\u662f\u5426\u5df2\u7d93\u767c\u751f\u788e\u7247\u5316\u3002<\/p>\n \u91cd\u65b0\u555f\u52d5\u4f3a\u670d\u5668\u80fd\u5426\u5fb9\u5e95\u89e3\u6c7a\u8a18\u61b6\u9ad4\u788e\u7247\u5316\uff1f<\/h3>\n \u95dc\u9375\u4e8b\u5be6\uff1a<\/strong>\u91cd\u65b0\u555f\u52d5\u6703\u5b8c\u5168\u6e05\u7a7a\u7cfb\u7d71 RAM\uff0c\u4e26\u91cd\u8a2d\u5be6\u9ad4\u9801\u9762\u5206\u914d\u72c0\u614b\u3002<\/p><\/blockquote>\n \u7136\u800c\uff0c\u91cd\u65b0\u555f\u52d5\u6703\u5e36\u4f86\u4e0d\u5fc5\u8981\u7684\u670d\u52d9\u4e2d\u65b7\u3002\u4f60\u66f4\u61c9\u8a72\u8abf\u6821\u6838\u5fc3\u58d3\u7e2e\u53c3\u6578\uff0c\u6216\u90e8\u7f72\u50cf jemalloc<\/code> \u9019\u6a23\u7684\u73fe\u4ee3\u5206\u914d\u5668\uff0c\u4ee5\u907f\u514d\u5728\u4e0d\u91cd\u65b0\u555f\u52d5\u751f\u7522\u7bc0\u9ede\u7684\u60c5\u6cc1\u4e0b\u53cd\u8986\u51fa\u73fe\u788e\u7247\u5316\u554f\u984c\u3002<\/p>\n \u70ba\u4ec0\u9ebc\u5728 RAM \u4ecd\u6709\u5269\u9918\u6642\uff0cOOM killer \u4ecd\u7136\u6703\u89f8\u767c\uff1f<\/h3>\n \u7576 Linux \u6838\u5fc3\u7121\u6cd5\u70ba\u9ad8\u968e\u8a18\u61b6\u9ad4\u8acb\u6c42\u627e\u5230\u8db3\u5920\u7684\u9023\u7e8c\u5be6\u9ad4\u9801\u9762\u6642\uff0cOOM killer \u5c31\u6703\u89f8\u767c\u3002\u56b4\u91cd\u7684\u5916\u90e8\u788e\u7247\u5316\u6703\u628a\u4f4d\u5740\u7a7a\u9593\u5207\u5272\u6210\u8a31\u591a\u5b64\u7acb\u7684\u5c0f\u9593\u9699\u3002\u4e00\u65e6\u76f4\u63a5\u58d3\u7e2e\u7121\u6cd5\u5c07\u9019\u4e9b\u9593\u9699\u6574\u5408\u6210\u9023\u7e8c\u7a7a\u9593\uff0c\u6838\u5fc3\u5c31\u6703\u5728\u7e3d\u7a7a\u9592 RAM \u4f9d\u7136\u8f03\u9ad8\u7684\u60c5\u6cc1\u4e0b\u7d42\u6b62\u884c\u7a0b\u3002<\/p>\n jemalloc \u8207 glibc malloc \u5728\u904b\u884c\u5c64\u9762\u7684\u4e3b\u8981\u5dee\u7570\u662f\u4ec0\u9ebc\uff1f<\/h3>\n \u6a19\u6e96 glibc malloc<\/code> \u4ee5\u5168\u57df\u65b9\u5f0f\u7ba1\u7406\u5806\u7a7a\u9593\uff0c\u9577\u6642\u9593\u904b\u884c\u5f8c\u66f4\u5bb9\u6613\u9020\u6210\u56b4\u91cd\u788e\u7247\u5316\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0cjemalloc<\/code> \u4f7f\u7528\u57f7\u884c\u7dd2\u5c08\u5c6c arena \u8207\u56fa\u5b9a\u5927\u5c0f bin\u3002\u9019\u7a2e\u5c08\u9580\u8a2d\u8a08\u7684\u67b6\u69cb\u80fd\u5920\u6e1b\u5c11\u5206\u6563\u5206\u914d\uff0c\u4e26\u66f4\u6709\u6548\u7387\u5730\u5c07\u4e0d\u518d\u9700\u8981\u7684\u8a18\u61b6\u9ad4\u9801\u9762\u6b78\u9084\u7d66\u6838\u5fc3\u3002[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":" [vc_row][vc_column][vc_column_text css=””]\u4f60 […]<\/p>\n Read More…<\/a><\/p>\n","protected":false},"author":1,"featured_media":33744,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[61],"tags":[12520,12521,12522,5836,2470],"class_list":["post-33747","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-tc","tag-linux-memory-management","tag-oom-errors","tag-memory-fragmentation","tag-memory-allocation-tc","tag-server-stability-tc"],"acf":[],"yoast_head":"\n