{"id":731,"date":"2013-09-03T08:31:34","date_gmt":"2013-09-03T08:31:34","guid":{"rendered":"http:\/\/blog.zhukunqian.com\/?p=731"},"modified":"2013-10-08T05:56:45","modified_gmt":"2013-10-08T05:56:45","slug":"%e6%9c%8d%e5%8a%a1%e5%99%a8%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96","status":"publish","type":"post","link":"http:\/\/blog.zhukunqian.com\/?p=731","title":{"rendered":"\u670d\u52a1\u5668\u6027\u80fd\u4f18\u5316"},"content":{"rendered":"

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\u6d4b\u8bd5\u73af\u5883\uff1a<\/p>\n

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1\u3001\u670d\u52a1\u5668\u5185\u5b581G\uff0c\u53d1\u73b0\u5728\u8fde\u63a5\u8fbe\u52301000\u4e2a\u5de6\u53f3\u65f6\uff0c\u670d\u52a1\u5668\u63a5\u8fd1\u5047\u6b7b\u72b6\u6001\u3002<\/p>\n

\u67e5\u770bgc: jstat -gcutil 21340 5000 999999<\/p>\n

  S0     S1     E      O      P     YGC     YGCT    FGC    FGCT     GCT   \r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   927 1793.564 1806.054\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   928 1797.939 1810.429\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   930 1800.529 1813.019\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   933 1809.093 1821.583\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   935 1813.729 1826.219\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   938 1818.452 1830.942\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   939 1822.462 1834.952\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   941 1827.227 1839.717\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   944 1834.183 1846.673\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   946 1836.594 1849.085\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   948 1842.616 1855.106\r\n  0.00  99.99 100.00 100.00  38.29    908   12.490   951 1849.040 1861.531\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   953 1854.135 1866.625\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   956 1858.858 1871.348\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   957 1862.671 1875.161\r\n  0.00 100.00 100.00 100.00  38.29    908   12.490   959 1867.481 1879.971<\/pre>\n
\u770b\u51fafull gc \u6b21\u6570\u9891\u7e41\u3002<\/p>\n
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\u8fde\u63a5\u5df2\u7ecf\u4e0a\u5347\u52305000\uff0c\u4f9d\u65e7\u65e0\u538b\u529b\u3002<\/p>\n
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3\u3001\u7ee7\u7eed\u89e3\u51b3\u8d85\u65f6\u7684\u95ee\u9898\u3002<\/p>\n
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4\u3001\u5728\u6d4b\u8bd5\u4e2d\u53d1\u73b0\uff0c\u867d\u7136\u4f7f\u7528\u4e86udp\u5f80rsyslog\u53d1\u9001\u65e5\u5fd7\uff0c\u4f46\u65e5\u5fd7\u91cf\u5982\u679c\u8fc7\u5927\uff0c\u4f9d\u65e7\u4f1a\u5f71\u54cd\u5230\u6027\u80fd\u3002<\/p>\n
5\u3001OK\uff0c\u73b0\u5728\u7684\u7ed3\u679c\u6bd4\u8f83\u7406\u60f3\u3002\u6700\u59272G\u5185\u5b58\uff0c\u901a\u8fc7probe\u67e5\u770b\u5b9e\u9645\u6d88\u8017\u4e0d\u52301G\u5185\u5b58\uff0c\u8fde\u63a5\u6570\u8fd8\u53ef\u4ee5\u7ee7\u7eed\u5f80\u4e0a\u63d0\u5347\u3002<\/p>\n
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2G\u5185\u5b58\u6d4b\u8bd5\u76841\u4e07\u4e2a\u8fde\u63a5\uff0c\u6700\u7ec8\u7a33\u5b9a\u57287900\u4e2a\uff0c\u6d41\u91cf5M\u5de6\u53f3\u3002\u5176\u4e2d2\u5343\u591a\u4e2a\u8fde\u63a5\u5931\u8d25\uff0c\u4e0d\u77e5\u9053\u662f\u56e0\u4e3a\u6211\u5728\u662f\u81ea\u5df1\u672c\u672c\u4e0a\u5f00\u542f1\u4e07\u4e2a\u8fde\u63a5\u5f15\u8d77\u7684\uff0c\u8fd8\u662f\u6709\u5176\u5b83bug\uff0c\u7b49\u4e0b\u518d\u6d4b\u8bd5\u3002\u5148\u8bd5\u4e0b3G\u5185\u5b58\u5f005\u4e07\u4e2a\u8fde\u63a5\u3002<\/p>\n
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gc\u4e5f\u662f\u5f88\u7a33\u5b9a\u3002fullgc\u4e0d\u662f\u5f88\u9891\u7e41\uff0c\u5bf9\u4e86\uff0c\u5728\u6d4b\u8bd5\u4e2d\u8fd8\u53d1\u73b0\u5f02\u6b65\u5b58\u50a8\u539f\u6765\u548c\u7528\u6237\u5904\u7406\u7ebf\u7a0b\u90fd\u653e\u5728\u540c\u4e00\u4e2a\u7ebf\u7a0b\u6c60\uff0c\u5bfc\u81f4\u7684\u5728\u5b58\u50a8\u65f6\u963b\u585e\u4e86\u7528\u6237\u5904\u7406\u7ebf\u7a0b\uff0c\u53d1\u73b0\u540e\uff0c\u4e13\u95e8\u4e3a\u5f02\u6b65\u5b58\u50a8\u6307\u4ee4\u5f00\u59cb\u4e00\u4e2a\u8fde\u63a5\u6c60\uff0c\u89e3\u51b3\u6389\u963b\u585e\u7528\u6237\u5904\u7406\u7ebf\u7a0b\u7684\u95ee\u9898\u3002<\/p>\n
2013.09.23 mina2\u6539\u4e3anetty4\uff0c\u7ee7\u7eed\u8fdb\u884c\u4f18\u5316\u3002<\/p>\n
3G\u5185\u5b58\uff0c1\u4e07\u4e2a\u8fde\u63a5\uff0cidle78%\u5de6\u53f3\u3002\u7f51\u7edc\u6d41\u91cf\u53d1\u900174k\/s,\u63a5\u65364.4M\/S(\u672a\u5f00\u542fno_delay)<\/p>\n
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protobuf\u5bf9\u8c61\u6570\u91cf\u5728\u767e\u4e07\u4ee5\u4e0a\u3002\u5360\u7528\u7684\u5185\u5b58\u8fbe\u52301.5G\u5de6\u53f3\u3002<\/p>\n
\u73b0\u5728\u5f00\u59cb\u9891\u7e41\u7684\u51fa\u73b0fgc.<\/p>\n
\u5f3a\u5236\u7ed3\u675f\u6389\u5ba2\u6237\u7aef\uff0c\u67e5\u770b\u5bf9\u8c61\u662f\u5426\u88ab\u56de\u6536\u3002\u597d\u5427\uff0c\u73b0\u5728\u5b8c\u5168\u611f\u89c9\u662f\u5185\u5b58\u6cc4\u9732\u4e86\u3002<\/p>\n
\u4fee\u6539\u670d\u52a1\u5668\u5904\u7406\u7a0b\u5e8f\uff0c\u6bcf\u6b21\u63a5\u6536\u5305\u540e\uff0c\u8bbe\u7f6eautoread\u4e3afalse,\u5904\u7406\u5b8c\u5305\u540e\u518d\u8bbe\u7f6e\u4e3atrue.\u5148\u8dd12\u4e2a\u5c0f\u65f6\u770b\u770b\u60c5\u51b5\u518d\u8bf4\u3002\u56e0\u4e3a\u4e0a\u6b21\u67e5\u770b\u65f6\uff0c\u6307\u4ee4\u961f\u5217\u957f\u5ea6\u6700\u591a\u6709400\u591a\u4e86\uff0c\u8fd9\u6837\u53ef\u4ee5\u9650\u5236\u6307\u4ee4\u961f\u5217\u4e0d\u4f1a\u592a\u957f\uff0c\u4e5f\u53ef\u4ee5\u907f\u514d\u4ee5\u540e\u6076\u610f\u7528\u6237\u4e0d\u95f4\u65ad\u53d1\u5305\u628a\u670d\u52a1\u5668\u5361\u4f4f\u3002<\/p>\n
\u627e\u5230\u539f\u56e0\u4e86\uff0c\u662f\u56e0\u4e3a\u6570\u636e\u5305\u592a\u591a\u4e86\uff0c\u5904\u7406\u4e0d\u8fc7\u6765\uff0c\u8981\u53d1\u9001\u7684\u6570\u636e\u6ca1\u6709\u53d1\u9001\u51fa\u53bb\uff0c\u9020\u6210\u6570\u636e\u4e0d\u65ad\u79ef\u7d2f\uff0c\u4ece\u800c\u8017\u5c3d\u5185\u5b58\u3002<\/p>\n
2013.09.26\u8bb0\uff1a<\/p>\n
1\u3001decoder\u4e2d\u7684byte[]\u5df2\u7ecf\u6539\u4e3a\u4f7f\u7528theadlocal\u7f13\u5b58\uff0c\u5927\u91cf\u51cf\u5c11\u4e86\u5b57\u8282\u6570\u7ec4\u7684\u521b\u5efa\u3002<\/p>\n
2\u3001\u53bb\u9664\u4e86\u4e2d\u95f4\u5bf9\u8c61\uff0c\u76f4\u63a5\u5728decoder\u4e2d\u89e3\u6790\u51faActionRunnable\u5bf9\u8c61\uff0c\u540c\u65f6\u6b64\u5bf9\u8c61\u4f7f\u7528\u5bf9\u8c61\u7f13\u51b2\u6c60\u56de\u6536\uff0c\u5927\u91cf\u51cf\u5c11\u4e86\u521b\u5efa\u5bf9\u8c61\u7684\u6570\u91cf\u3002<\/p>\n
3\u3001\u52a8\u624b\u4fee\u6539protobuf\uff0c\u80fd\u591f\u7f13\u5b58protobuf\u5bf9\u8c61\u3002<\/p>\n
    \n
  1. \u5148\u4ece\u7f51\u4e0a\u627e\u5230protoc\u7684\u6e90\u7801\uff0c\u52a8\u624b\u4fee\u6539\u3001<\/li>\n
  2. \u6dfb\u52a0reInit\u65b9\u6cd5\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u548cinit\u4e0d\u540c\uff0c\u4ed6\u5bf9\u96c6\u5408\u5bf9\u8c61\u53ea\u6267\u884cclear\uff0c\u4e0d\u91cd\u65b0\u521b\u5efa\u4e00\u4e2alist\u8d4b\u503c\u3002<\/li>\n
  3. \u6dfb\u52a0parseFrom2\uff0c\u5185\u90e8\u8c03\u7528reinit\u65b9\u6cd5\u5e76\u6267\u884cparseFrom(byte[])\u7684\u529f\u80fd\u3002<\/li>\n
  4. \u4fee\u6539\u5b8c\u6210\u540e\uff0cgc\u60c5\u51b5\u5927\u4e3a\u6539\u5584\u3002<\/li>\n<\/ol>\n
    4\u3001\u52a8\u624b\u4fee\u6539protobuf\u4e2d\u7684toByteArray().<\/p>\n
      \n
    1. \u67e5\u770bprotobuf\u4ee3\u7801\uff0c\u53d1\u73b0\u4e00\u4e2aprotobuf\u4e2d\u5171\u7528\u4e00\u4e2abyte[]\uff0c\u56e0\u6b64\u4e5f\u53ef\u4ee5\u4f7f\u7528threadlocal\u7f13\u5b58\u8fdb\u884c\u4f18\u5316\u3002\n
                    public byte[] toByteArray() {\r\n\t\t\ttry {\r\n\t\t\t\tfinal byte[] result = cn.joylab.game.net.cache.ThreadLocalCache.getBytesProtobuf(getSerializedSize());\r\n\t\t\t\tfinal CodedOutputStream output = CodedOutputStream\r\n\t\t\t\t\t\t.newInstance(result);\r\n\t\t\t\twriteTo(output);\r\n\t\t\t\toutput.checkNoSpaceLeft();\r\n\t\t\t\treturn result;\r\n\t\t\t} catch (IOException e) {\r\n\t\t\t\tthrow new RuntimeException(\r\n\t\t\t\t\t\t"Serializing to a byte array threw an IOException "\r\n\t\t\t\t\t\t\t\t+ "(should never happen).", e);\r\n\t\t\t}\r\n\t\t}<\/pre>\n<\/li>\n
    2. \u53d1\u73b0\u8fd9\u51e0\u4e2a\u65b9\u6cd5\u90fd\u63d0\u4f9b\u516c\u5f00\u8c03\u7528\uff0c\u8fd9\u6837\u4e0d\u5fc5\u53bb\u4fee\u6539protoc\u76f4\u63a5\u4ece\u5916\u90e8\u751f\u6210byte[].\n
      \/**\r\n\t * \u4f7f\u7528\u4e86\u7ebf\u7a0b\u7f13\u5b58\uff0c\u907f\u514d\u4e86byte[]\u7684\u5927\u91cf\u521b\u5efa\r\n\t * @param messageLite\r\n\t * @return\r\n\t * @throws IOException\r\n\t *\/\r\n\tprivate byte[] toByteArray(MessageLite messageLite) throws IOException{\r\n\t\tbyte[] result = cn.joylab.game.net.cache.ThreadLocalCache\r\n\t\t\t\t.getBytesProtobuf(messageLite.getSerializedSize());\r\n\t\tCodedOutputStream output = CodedOutputStream.newInstance(result);\r\n\t\tmessageLite.writeTo(output);\r\n\r\n\t\treturn result;\r\n\t}<\/pre>\n<\/li>\n<\/ol>\n
      5\u3001\u52a8\u624b\u4fee\u6539protobuf\u4e2d\u7684Builder\u5bf9\u8c61\u3002<\/p>\n
        \n
      1. \u8fd9\u91cc\u6bd4\u8f83\u9ebb\u70e6\u4e00\u4e9b\u3002\u56e0\u4e3a\u5206\u4e3abuilder\u5bf9\u8c61\u53camessage\u5bf9\u8c61\u3002message\u5bf9\u8c61\u7531builder\u8fdb\u884c\u751f\u6210\u3002\u4e3a\u4e86\u51cf\u5c11\u5bf9\u8c61\u4ea7\u751f\u3002\u8fd9\u91ccbuilder\u548cmessage\u5bf9\u8c61\u90fd\u9700\u8981\u8fdb\u884c\u7f13\u5b58\u3002<\/li>\n
      2. builder\u5bf9\u8c61\u6bd4\u8f83\u65b9\u4fbf\uff0c\u672c\u8eab\u81ea\u5e26clear()\u65b9\u6cd5\uff0c\u4ece\u7f13\u5b58\u4e2d\u53d6\u51fa\u76f4\u63a5clear()\u540e\u5c31\u53ef\u4ee5\u4f9b\u540e\u7eed\u4f7f\u7528<\/li>\n
      3. message\u5bf9\u8c61\u9700\u8981\u624b\u52a8\u8c03\u7528reInit\u6e05\u7406<\/li>\n
      4. builder\u5728newBuilder\u4e2d\u4ece\u7f13\u5b58\u4e2d\u53d6\uff0c\u5728builder()\u540e\u653e\u5165\u7f13\u5b58\uff0c\u653e\u5165\u65f6\u8c03\u7528clear()<\/li>\n
      5. message\u5bf9\u8c61\u5728builder\u4e2d\u53d6\uff0c\u5728decoder\u5b8c\u6210\u540e\u653e\u5165\u7f13\u5b58\u3002\u53d6\u51fa\u65f6\u8c03\u7528reInit\u6e05\u7406\u3002<\/li>\n
      6. \u5728toByteArray\u56e0\u4e3a\u7528\u7684byte[]\u662f\u7f13\u5b58\u7684\uff0c\u6240\u4ee5\u4f1a\u9047\u5230checkNoSpaceLeft\u65e0\u6cd5\u901a\u8fc7\u3002\u8fd9\u91cc<\/li>\n<\/ol>\n
        2013.10.07 \u771f\u5947\u602a\uff0c\u611f\u89c9\u6587\u7ae0\u4e22\u5931\u4e86\u51e0\u6bb5\u5185\u5bb9\uff0c\u8bb0\u4e0d\u8d77\u6765\u662f\u4e22\u5931\u4e86\u54ea\u51e0\u90e8\u5206\u4e86\u3002<\/p>\n
        \u8fd9\u91cc\u5148\u8bb0\u5f55\u4e0b\u56fd\u5e86\u524d\u4e86\u89e3\u7684\u5185\u5bb9\u3002<\/p>\n
        \u5728\u6bcf\u79d21\u4e07\u4e2a\u6570\u636e\u5305\u7684\u538b\u529b\u4e0b\uff0c1\u5c0f\u65f6\u5de6\u53f3\uff0cjvm\u5185\u5b58\u8017\u5c3d\uff0c\u65e0\u9650\u5f00\u59cbfgc\u3002<\/p>\n
        \u8fd9\u91cc\u4f7f\u7528\u4e86java\u81ea\u5e26\u7684\u5185\u5b58\u5bf9\u8c61\u5206\u6790\u5de5\u5177<\/p>\n
        jmap -dump:format=b,file=dump1.dump 12377<\/p>\n
        \u5c06\u5185\u5b58\u4fdd\u5b58\u4e3a\u6587\u4ef6\u3002<\/p>\n
        \u7136\u540e\u4f7f\u7528:<\/p>\n
        jhat dump1.dump \u53ef\u4ee5\u4f7f\u7528\u5c0f\u578bhttp server\u6765\u67e5\u770b\u5185\u5b58\u3002<\/p>\n
        \u8fd9\u91cc\u5c31\u662f\u4f7f\u7528\u4e86\u8fd9\u4e2a\u5de5\u5177\u6765\u53d1\u73b0\u4e86netty\u81ea\u5e26\u7684\u5185\u5b58\u7f13\u5b58\u5206\u914d\u9020\u6210\u7684\u95ee\u9898\u3002jvm\u5206\u914d\u4e863G\u5185\u5b58\uff0cnetty\u7ed9\u81ea\u5df1\u7684\u7f13\u5b58\u5206\u914d\u4e862G\u5185\u5b58\u5bfc\u81f4\u5185\u5b58\u4e0d\u8db3\u3002<\/p>\n
        AbstractByteBufAllocator<\/a>\u4e2d\u7684\u5c5e\u6027\uff1a<\/p>\n
        MAX_CHUNK_SIZE (I) : 1073741824\r\nMIN_PAGE_SIZE (I) : 4096\r\nDEFAULT_MAX_ORDER (I) : 11\r\nDEFAULT_PAGE_SIZE (I) : 8192\r\nDEFAULT_NUM_DIRECT_ARENA (I) : 8\r\nDEFAULT_NUM_HEAP_ARENA (I) : 8<\/pre>\n
        PoolChunk\u4e2d\u5206\u914d\u4e86\u5177\u4f53\u7684\u5185\u5b58\uff1a<\/p>\n
        16M\u7684byte[].\u5c5e\u6027\u4e3a\uff1amemoryMap<\/p>\n
         <\/p>\n
        chunkSize (I) : 16777216
        \nfreeBytes (I) : 0<\/p>\n
        freeBytes\u4e3a0\uff0c\u8bf4\u660e\u5df2\u7ecf\u88ab\u5206\u914d\u4e86\uff0c\u4e3a\u4ec0\u4e48\u6ca1\u6709\u88ab\u91ca\u653e\u6389\u3002\u96be\u9053\u6ca1\u6709\u88ab\u4f7f\u7528\uff0c\u8fd9\u6837\u7684\u8bdd\uff0c\u9700\u8981\u5148\u8f93\u51fanetty\u7684statistics\u6765\u67e5\u770b\u539f\u56e0\u3002<\/p>\n
        \u53ef\u80fd\u627e\u5230\u5185\u5b58\u672a\u91ca\u653e\u7684\u539f\u56e0\u4e86\u3002\u6211\u5728decoder\u4e2d\u5199\u4e86\u4e24\u53e5\u6d4b\u8bd5\u4ee3\u7801\uff0c\u672a\u88ab\u6ce8\u91ca\u6389\uff0c\u5bfc\u81f4\u5185\u5b58\u4e0d\u65ad\u88ab\u6d88\u8017\u800c\u6ca1\u6709\u88ab\u91ca\u653e\u6389\u3002<\/p>\n
        \u5bf9\u4e86\uff0cjetty\u6709\u4e00\u4e2acontinuation\u6280\u672f\uff0c\u53ef\u4ee5\u5b9e\u73b0http\u77ed\u8fde\u63a5\u7684io\u4e0e\u4e1a\u52a1\u903b\u8f91\u5904\u7406\u7ebf\u7a0b\u5206\u79bb\uff0c\u5b9e\u73b0\u65f6\uff0c\u53ef\u4ee5\u501f\u7b7e(\u540c\u65f6\u548cnetty\u7684http\u6280\u672f\u6bd4\u8f83\u4e00\u4e0b)\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u4eca\u5929\u5b8c\u6210\u4e86\u6d4b\u8bd5\u673a\u5668\u4eba\uff0c\u5f00\u59cb\u5bf9\u670d\u52a1\u5668\u8fdb\u884c\u6027\u80fd\u6d4b\u8bd5\u3002 \u6d4b\u8bd5\u73af\u5883\uff1a \u5ba2\u6237\u7aef\uff1a\u5f00\u59cb100 …<\/p>\n
        \u7ee7\u7eed\u9605\u8bfb »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"_links":{"self":[{"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts\/731"}],"collection":[{"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=731"}],"version-history":[{"count":15,"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts\/731\/revisions"}],"predecessor-version":[{"id":736,"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=\/wp\/v2\/posts\/731\/revisions\/736"}],"wp:attachment":[{"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=731"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.zhukunqian.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}