[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n

\u65e5\u5fd7\u6587\u4ef6\u5206\u6790\u548c\u4f4d\u7f6e<\/strong><\/h2>\n

\u5185\u5b58\u6545\u969c\u6392\u67e5\u7684\u5173\u952e\u65e5\u5fd7\u6587\u4ef6\u901a\u5e38\u4f4d\u4e8e\u4ee5\u4e0b\u4f4d\u7f6e\uff1a<\/p>\n

\n
• \/var\/log\/messages – \u5305\u542b\u4e00\u822c\u7cfb\u7edf\u6d88\u606f<\/li>\n
• \/var\/log\/syslog – \u8bb0\u5f55\u7cfb\u7edf\u8303\u56f4\u65e5\u5fd7<\/li>\n
• \/var\/log\/kern.log – \u5185\u6838\u7279\u5b9a\u6d88\u606f<\/li>\n
• \/var\/log\/dmesg – \u542f\u52a8\u65f6\u5185\u5b58\u6d88\u606f<\/li>\n<\/ul>\n

  \u8981\u6709\u6548\u5206\u6790\u8fd9\u4e9b\u65e5\u5fd7\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n

  \n
  1. \u5b9e\u65f6\u65e5\u5fd7\u76d1\u63a7\uff1a\n

     tail -f \/var\/log\/syslog | grep -i \"memory\"<\/pre>\n<\/li>\n
     \u5386\u53f2\u5206\u6790\uff1a\n
     zgrep \"Out of memory\" \/var\/log\/syslog*<\/pre>\n<\/li>\n
     \u5185\u6838\u5185\u5b58\u4e8b\u4ef6\uff1a\n
     dmesg | grep -i \"memory\"<\/pre>\n<\/li>\n<\/ol>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u9ad8\u7ea7\u5185\u5b58\u8c03\u8bd5\u6280\u672f<\/strong><\/h2>\n
     \u6df1\u5165\u5206\u6790\u65f6\uff0c\u5b9e\u65bd\u8fd9\u4e9b\u9ad8\u7ea7\u8c03\u8bd5\u65b9\u6cd5\uff1a<\/p>\n
     \n
     \u4f7f\u7528pmap\u68c0\u67e5\u8fdb\u7a0b\u5185\u5b58\u6620\u5c04\uff1a\n
     pmap -x [PID]<\/pre>\n<\/li>\n
     \u5206\u6790\u7cfb\u7edf\u5185\u5b58\u7edf\u8ba1\uff1a\n
     cat \/proc\/meminfo<\/pre>\n<\/li>\n
     \u76d1\u63a7\u5185\u5b58\u5206\u914d\u6a21\u5f0f\uff1a\n
     valgrind --tool=massif [your-program]<\/pre>\n<\/li>\n<\/ul>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u7cfb\u7edf\u5185\u5b58\u95ee\u9898\u8c03\u67e5<\/strong><\/h2>\n
     \u5f53\u9999\u6e2f\u670d\u52a1\u5668\u51fa\u73b0\u5185\u5b58\u5f02\u5e38\u65f6\uff0c\u8bf7\u9075\u5faa\u4ee5\u4e0b\u7ed3\u6784\u5316\u8c03\u8bd5\u65b9\u6cd5\uff1a<\/p>\n
     \n
     \u521d\u6b65\u8bc4\u4f30\n
     \n
     \u68c0\u67e5\u5f53\u524d\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff1a\n
     free -h<\/pre>\n<\/li>\n
     \u76d1\u63a7\u4ea4\u6362\u6d3b\u52a8\uff1a\n
     vmstat 1 5<\/pre>\n<\/li>\n
     \u8bc6\u522b\u5185\u5b58\u6d88\u8017\u5927\u7684\u8fdb\u7a0b\uff1a\n
     ps aux --sort=-%mem | head -n 10<\/pre>\n<\/li>\n<\/ul>\n<\/li>\n
     \u6df1\u5ea6\u5206\u6790\n
     \n
     \u67e5\u770bOOM\u7ec8\u6b62\u7a0b\u5e8f\u65e5\u5fd7\uff1a\n
     dmesg | grep -i kill<\/pre>\n<\/li>\n
     \u5206\u6790\u5185\u5b58\u788e\u7247\uff1a\n
     cat \/proc\/buddyinfo<\/pre>\n<\/li>\n
     \u68c0\u67e5\u7cfb\u7edf\u5185\u5b58\u7edf\u8ba1\uff1a\n
     cat \/proc\/meminfo<\/pre>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u5e38\u89c1\u6839\u6e90\u548c\u89e3\u51b3\u65b9\u6848<\/strong><\/h2>\n
     \u5185\u5b58\u6ce2\u52a8\u901a\u5e38\u6e90\u4e8e\u4ee5\u4e0b\u5178\u578b\u573a\u666f\uff1a<\/p>\n
     \n
     \u5e94\u7528\u7a0b\u5e8f\u5185\u5b58\u6cc4\u6f0f\n
     \n
     \u5b9e\u65bd\u9002\u5f53\u7684\u5185\u5b58\u5206\u6790<\/li>\n
     \u5bf9Java\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528jmap\u7b49\u5de5\u5177<\/li>\n
     \u5b9a\u671f\u76d1\u63a7\u5806\u8f6c\u50a8<\/li>\n<\/ul>\n<\/li>\n
     \u6570\u636e\u5e93\u914d\u7f6e\u95ee\u9898\n
     \n
     \u4f18\u5316MySQL\/PostgreSQL\u7f13\u51b2\u533a\u8bbe\u7f6e<\/li>\n
     \u9002\u5f53\u8c03\u6574innodb_buffer_pool_size<\/li>\n
     \u76d1\u63a7\u67e5\u8be2\u6027\u80fd\u548c\u5185\u5b58\u4f7f\u7528<\/li>\n<\/ul>\n<\/li>\n
     \u7f13\u5b58\u914d\u7f6e\u95ee\u9898\n
     \n
     \u68c0\u67e5Redis\/Memcached\u8bbe\u7f6e<\/li>\n
     \u5b9e\u65bd\u9002\u5f53\u7684\u7f13\u5b58\u6e05\u9664\u7b56\u7565<\/li>\n
     \u76d1\u63a7\u7f13\u5b58\u547d\u4e2d\u7387<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u5185\u5b58\u4f18\u5316\u7b56\u7565\u5b9e\u65bd<\/strong><\/h2>\n
     \u5e94\u7528\u8fd9\u4e9b\u7ecf\u8fc7\u9a8c\u8bc1\u7684\u4f18\u5316\u6280\u672f\uff1a<\/p>\n
     \n
     \u7cfb\u7edf\u7ea7\u4f18\u5316\n
     # \u8c03\u6574\u5185\u6838\u53c2\u6570\r\nsysctl -w vm.swappiness=10\r\nsysctl -w vm.vfs_cache_pressure=50\r\n<\/pre>\n<\/li>\n
     \u5e94\u7528\u7a0b\u5e8f\u7ea7\u8c03\u4f18\n
     \n
     \u5b9e\u65bd\u9002\u5f53\u7684\u5783\u573e\u6536\u96c6\u7b56\u7565<\/li>\n
     \u5bf9\u9891\u7e41\u5206\u914d\u4f7f\u7528\u5185\u5b58\u6c60<\/li>\n
     \u4f18\u5316\u6570\u636e\u5e93\u8fde\u63a5\u6c60<\/li>\n<\/ul>\n<\/li>\n
     \u76d1\u63a7\u8bbe\u7f6e\n
     \n
     \u914d\u7f6e\u8b66\u62a5\u9608\u503c<\/li>\n
     \u5b9e\u65bd\u8d8b\u52bf\u5206\u6790<\/li>\n
     \u8bbe\u7f6e\u81ea\u52a8\u54cd\u5e94\u673a\u5236<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u9884\u9632\u63aa\u65bd\u548c\u6700\u4f73\u5b9e\u8df5<\/strong><\/h2>\n
     \u5728\u9999\u6e2f\u670d\u52a1\u5668\u57fa\u7840\u8bbe\u65bd\u4e2d\u5b9e\u65bd\u8fd9\u4e9b\u4e3b\u52a8\u7b56\u7565\u4ee5\u9884\u9632\u5185\u5b58\u95ee\u9898\uff1a<\/p>\n
     \n
     \u81ea\u52a8\u76d1\u63a7\u8bbe\u7f6e\n
     \n
     \u914d\u7f6e\u5185\u5b58\u4f7f\u7528\u8b66\u62a5\uff1a\n
     # Prometheus\u8b66\u62a5\u89c4\u5219\u793a\u4f8b\r\nalert: HighMemoryUsage\r\nexpr: (node_memory_MemTotal_bytes - node_memory_MemAvailable_bytes) \/ node_memory_MemTotal_bytes * 100 > 85\r\n<\/pre>\n<\/li>\n
     \u5b9e\u65bd\u65e5\u5fd7\u8f6e\u8f6c\u7b56\u7565<\/li>\n
     \u8bbe\u7f6e\u8d8b\u52bf\u5206\u6790\u4eea\u8868\u677f<\/li>\n<\/ul>\n<\/li>\n
     \u8d44\u6e90\u89c4\u5212\n
     \n
     \u8ba1\u7b97\u9002\u5f53\u7684\u5185\u5b58\u9700\u6c42<\/li>\n
     \u89c4\u5212\u53ef\u6269\u5c55\u6027<\/li>\n
     \u5b9e\u65bd\u8d1f\u8f7d\u5747\u8861\u7b56\u7565<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u5e94\u6025\u54cd\u5e94\u534f\u8bae<\/strong><\/h2>\n
     \u5efa\u7acb\u660e\u786e\u7684\u4e8b\u4ef6\u54cd\u5e94\u8ba1\u5212\uff1a<\/p>\n
     \n
     \u521b\u5efa\u5185\u5b58\u95ee\u9898\u64cd\u4f5c\u624b\u518c\n
     # \u5feb\u901f\u54cd\u5e94\u547d\u4ee4\r\necho 1 > \/proc\/sys\/vm\/drop_caches    # \u6e05\u9664\u9875\u9762\u7f13\u5b58\r\nservice mysqld restart               # \u9700\u8981\u65f6\u91cd\u542f\u6570\u636e\u5e93\r\n<\/pre>\n<\/li>\n
     \u5b9a\u4e49\u5347\u7ea7\u7a0b\u5e8f<\/li>\n
     \u8bb0\u5f55\u6062\u590d\u7b56\u7565<\/li>\n<\/ul>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u957f\u671f\u5185\u5b58\u7ba1\u7406\u7b56\u7565<\/strong><\/h2>\n
     \u5236\u5b9a\u5168\u9762\u7684\u5185\u5b58\u7ba1\u7406\u65b9\u6cd5\uff1a<\/p>\n
     \n
     \u5b9a\u671f\u6027\u80fd\u8bc4\u5ba1\n
     \n
     \u6708\u5ea6\u5bb9\u91cf\u89c4\u5212<\/li>\n
     \u5b63\u5ea6\u6027\u80fd\u5ba1\u8ba1<\/li>\n
     \u5e74\u5ea6\u57fa\u7840\u8bbe\u65bd\u8bc4\u4f30<\/li>\n<\/ul>\n<\/li>\n
     \u6587\u6863\u548c\u57f9\u8bad\n
     \n
     \u4fdd\u6301\u6545\u969c\u6392\u9664\u6307\u5357\u66f4\u65b0<\/li>\n
     \u5f00\u5c55\u56e2\u961f\u57f9\u8bad\u8bfe\u7a0b<\/li>\n
     \u7ef4\u62a4\u4e8b\u4ef6\u54cd\u5e94\u624b\u518c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
     [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text css=””]<\/p>\n
     \u7ed3\u8bba<\/strong><\/h2>\n
     \u9999\u6e2f\u670d\u52a1\u5668\u7684\u6709\u6548\u5185\u5b58\u7ba1\u7406\u9700\u8981\u7ed3\u5408\u4e3b\u52a8\u76d1\u63a7\u3001\u5feb\u901f\u6545\u969c\u6392\u9664\u6280\u80fd\u548c\u7cfb\u7edf\u5316\u7684\u95ee\u9898\u89e3\u51b3\u65b9\u6848\u3002\u901a\u8fc7\u9075\u5faa\u8fd9\u4e9b\u6307\u5357\u5e76\u5b9e\u65bd\u9002\u5f53\u7684\u76d1\u63a7\u5de5\u5177\uff0c\u60a8\u53ef\u4ee5\u7ef4\u6301\u6700\u4f73\u670d\u52a1\u5668\u6027\u80fd\u5e76\u5728\u5f71\u54cd\u670d\u52a1\u4e4b\u524d\u9884\u9632\u5185\u5b58\u76f8\u5173\u95ee\u9898\u3002<\/p>\n
     \u8bf7\u8bb0\u4f4f\uff0c\u670d\u52a1\u5668\u5185\u5b58\u6545\u969c\u6392\u9664\u662f\u4e00\u4e2a\u9700\u8981\u5b9a\u671f\u5173\u6ce8\u7684\u6301\u7eed\u8fc7\u7a0b\uff0c\u9700\u8981\u53ca\u65f6\u66f4\u65b0\u60a8\u7684\u76d1\u63a7\u548c\u7ef4\u62a4\u7b56\u7565\u3002\u6301\u7eed\u4e86\u89e3\u6700\u65b0\u7684\u5185\u5b58\u7ba1\u7406\u6280\u672f\u548c\u5de5\u5177\uff0c\u4ee5\u4fdd\u6301\u9999\u6e2f\u670d\u52a1\u5668\u79df\u7528\u57fa\u7840\u8bbe\u65bd\u7684\u5e73\u7a33\u9ad8\u6548\u8fd0\u884c\u3002<\/p>\n
     [\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"
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     Read More…<\/a><\/p>\n","protected":false},"author":1,"featured_media":28659,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[9395,9396,9397,6515,5351],"class_list":["post-28662","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hong-kong-dedicated-server-sc","tag-memory-fluctuation","tag-server-logs","tag-memory-debugging","tag-hong-kong-server-memory-sc","tag-server-troubleshooting-sc"],"acf":[],"yoast_head":"\n