{"id":122988,"date":"2026-11-06T05:24:42","date_gmt":"2026-11-05T21:24:42","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/122988.html"},"modified":"2026-11-06T05:24:42","modified_gmt":"2026-11-05T21:24:42","slug":"innodb-%e8%a1%8c%e6%a0%bc%e5%bc%8f%e8%af%a6%e8%a7%a3%ef%bc%9adynamic-compact-compressed-redundant","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/122988.html","title":{"rendered":"InnoDB \u884c\u683c\u5f0f\u8be6\u89e3\uff1aDYNAMIC \/ COMPACT \/ COMPRESSED \/ REDUNDANT"},"content":{"rendered":"

\u4e00\u3001\u884c\u683c\u5f0f\u603b\u89c8<\/h2>\n

1.1 \u56db\u79cd\u884c\u683c\u5f0f\u4e0e\u9ed8\u8ba4\u503c<\/h4>\n\n\u884c\u683c\u5f0f\u51fa\u73b0\u65f6\u4ee3\u662f\u5426\u9ed8\u8ba4\u603b\u4f53\u5b9a\u4f4d<\/tr>\n\n\n\n\n\n
REDUNDANT<\/td>\nInnoDB \u6700\u65e9（MySQL 4.1 \u65f6\u4ee3）<\/td>\n\u274c<\/td>\n\u5386\u53f2\u9057\u7559，\u4ec5\u517c\u5bb9\u65e7\u8868<\/td>\n<\/tr>\n
COMPACT<\/td>\nMySQL 5.0 \u5f15\u5165<\/td>\n5.6 \u9ed8\u8ba4<\/td>\n5.x \u65f6\u4ee3\u7684\u4e3b\u6d41\u683c\u5f0f<\/td>\n<\/tr>\n
DYNAMIC<\/td>\nMySQL 5.7 \u5f15\u5165<\/td>\n5.7 \/ 8.0 \u9ed8\u8ba4<\/td>\n\u5f53\u524d\u9ed8\u8ba4，\u957f\u5b57\u6bb5\u5168\u91cf\u6ea2\u51fa<\/td>\n<\/tr>\n
COMPRESSED<\/td>\nMySQL 5.7 \u5f15\u5165<\/td>\n\u274c<\/td>\nDYNAMIC + \u9875\u7ea7\u538b\u7f29，\u65f6\u95f4\u6362\u7a7a\u95f4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u52a0\u7c97\u8981\u70b9：8.0 \u9ed8\u8ba4\u884c\u683c\u5f0f\u662f DYNAMIC，\u7531\u7cfb\u7edf\u53d8\u91cf innodb_default_row_format \u63a7\u5236（\u9ed8\u8ba4\u503c DYNAMIC）\u3002<\/p>\n

1.2 \u67e5\u770b\u4e0e\u6307\u5b9a\u884c\u683c\u5f0f<\/h4>\n

— \u67e5\u770b\u67d0\u5f20\u8868\u7684\u884c\u683c\u5f0f
\nSHOW TABLE STATUS LIKE 't1'\\\\G — \u770b Row_format \u5b57\u6bb5
\nSHOW CREATE TABLE t1\\\\G — \u770b ROW_FORMAT \u5b50\u53e5<\/p>\n

— \u5efa\u8868 \/ \u6539\u8868\u65f6\u6307\u5b9a\u884c\u683c\u5f0f
\nCREATE TABLE t1 (id INT PRIMARY KEY, name VARCHAR(100)) ROW_FORMAT=DYNAMIC;
\nALTER TABLE t1 ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=8;<\/p>\n

1.3 \u672c\u7cfb\u5217\u5206\u6790\u7684\u57fa\u7ebf<\/h4>\n

\u4e0a\u7bc7InnoDB \u9875\u7ed3\u6784\u8be6\u89e3：\u9875\u7c7b\u578b\u3001\u9875\u5934\u9875\u5c3e\u3001\u6570\u636e\u884c\u4e0e\u9875\u76ee\u5f55-CSDN\u535a\u5ba2\u00a0\u5206\u6790\u7684"\u989d\u5916\u4fe1\u606f + \u771f\u5b9e\u6570\u636e"\u7ed3\u6784，\u5c31\u662f DYNAMIC \u884c\u683c\u5f0f\u3002\u672c\u7bc7\u4ee5\u5b83\u4e3a\u4e3b\u7ebf，\u518d\u770b\u53e6\u5916\u4e09\u79cd\u7684\u5dee\u5f02\u3002<\/p>\n

\n

\u4e8c\u3001DYNAMIC \u884c\u683c\u5f0f（\u9ed8\u8ba4）<\/h3>\n

2.1 \u603b\u4f53\u7ed3\u6784<\/h4>\n

COMPACT \/ DYNAMIC \u884c\u683c\u5f0f（\u4e00\u6761\u8bb0\u5f55\u7684\u7269\u7406\u5e03\u5c40）<\/p>\n

\u8bb0\u5f55\u8d77\u70b9
\n \u2502
\n \u25bc
\n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u252c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
\n\u2502 \u53d8\u957f\u5b57\u6bb5\u957f\u5ea6\u5217\u8868 \u2502 NULL \u503c\u4f4d\u56fe \u2502 \u8bb0\u5f55\u5934（5B\/40bit） \u2502 \u771f\u5b9e\u6570\u636e（\u5217\u503c + \u9690\u85cf\u5217） \u2502
\n\u2502 （\u6309\u5217\u9006\u5e8f，2B\/\u5217）\u2502 （1bit\/\u5217） \u2502 heap_no\/next_record \u2502 DB_TRX_ID(6) DB_ROLL_PTR(7)\u2026\u2502
\n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518
\n \u2502
\n \u2514\u2500\u2500 next_record \u2500\u2500\u25b6 \u4e0b\u4e00\u6761\u8bb0\u5f55\u7684"\u771f\u5b9e\u6570\u636e\u8d77\u70b9" <\/p>\n\n\u90e8\u5206\u7ec4\u6210\u5927\u5c0f<\/tr>\n\n\n\n
\u989d\u5916\u4fe1\u606f<\/td>\n\u53d8\u957f\u5b57\u6bb5\u957f\u5ea6\u5217\u8868 + NULL \u503c\u5217\u8868 + \u8bb0\u5f55\u5934<\/td>\n\u957f\u5ea6\u5217\u8868\/NULL \u4f4d\u56fe\u53d8\u957f，\u8bb0\u5f55\u5934\u56fa\u5b9a 5B<\/td>\n<\/tr>\n
\u771f\u5b9e\u6570\u636e<\/td>\n\u5404\u7528\u6237\u5217\u7684\u503c（\u542b\u4e3b\u952e\u5217） + \u9690\u85cf\u5217<\/td>\n\u53d8\u957f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

2.2 \u771f\u5b9e\u6570\u636e\u91cc\u5230\u5e95\u6709\u4ec0\u4e48<\/h4>\n

\u4e3b\u952e\u00a0 \u00a0DB_TRX_ID\u00a0 \u00a0 DB_ROLL_PTR\u00a0 \u00a0 \u5176\u4f59\u5217<\/span><\/p>\n

\u5f53\u8868\u4e2d\u5b58\u5728\u4e3b\u952e\u65f6\u76f4\u63a5\u5c06\u5bf9\u5e94\u7684\u4e3b\u952e\u653e\u5728\u524d\u9762；\u5982\u679c\u4e0d\u5b58\u5728\u4e3b\u952e，\u4f46\u662f\u5b58\u5728\u975e\u7a7a\u552f\u4e00\u952e，\u5c06\u7b2c\u4e00\u4e2a\u975e\u7a7a\u552f\u4e00\u952e\u4f5c\u4e3a\u4e3b\u952e\u7ec4\u7ec7\u6570\u636e；\u5982\u679c\u4e24\u8005\u90fd\u6ca1\u6709，\u5219\u81ea\u52a8\u751f\u6210\u4e3b\u952e\u3002<\/span><\/p>\n<\/p>\n

\u5bf9\u4e8e\u4e8c\u7ea7\u7d22\u5f15\u6811，\u653e\u5728\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u7684\u662f\u5bf9\u5e94\u7684\u7d22\u5f15，\u6570\u636e\u662f\u4e3b\u952e (InnoDB\u4e0b）<\/span><\/p>\n

\n

\u4e09\u3001NULL \u503c\u5217\u8868\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n

3.1 \u4e09\u6761\u89c4\u5219<\/h4>\n
  • \u6bcf\u4e2a\u5141\u8bb8\u4e3a NULL \u7684\u5217\u5360 1 bit，\u4e0d\u5141\u8bb8\u4e3a NULL \u7684\u5217\u4e0d\u5360\u4f4d；<\/li>\n
  • \u4f4d\u56fe\u9006\u5e8f\u5b58\u653e（\u6700\u540e\u4e00\u5217\u5bf9\u5e94\u6700\u4f4e\u4f4d）；<\/li>\n
  • \u82e5\u6240\u6709\u5217\u90fd\u662f NOT NULL，\u6574\u4e2a NULL \u5217\u8868\u4e0d\u5360\u5b57\u8282\u3002<\/li>\n

    \u793a\u4f8b：\u8868 t(id INT NOT NULL, name VARCHAR(10) NULL, age INT NULL, addr VARCHAR(20) NULL)
    \n\u2192 \u53ef\u7a7a\u5217\u6309\u5b9a\u4e49\u987a\u5e8f：name\u3001age\u3001addr（3 \u5217 \u2192 \u4f4d\u56fe\u5360 3 bit，\u4e0d\u8db3 1 \u5b57\u8282\u6309 1 \u5b57\u8282\u5bf9\u9f50？）
    \n \u4f4d\u56fe（\u9006\u5e8f）：addr(bit2) age(bit1) name(bit0)
    \n \u82e5 name=NULL, age=20, addr='NJ' \u2192 \u4f4d\u56fe = 001（\u4ec5 bit0=1）<\/p>\n

    NULL \u4f4d\u56fe\u6309\u5b57\u8282\u5b58\u653e，\u5b9e\u9645\u5360\u7528\u7684\u5b57\u8282\u6570 = \u5411\u4e0a\u53d6\u6574（\u53ef\u7a7a\u5217\u6570 \/ 8）\u3002<\/p>\n

    3.2 \u4e3a\u4ec0\u4e48"\u81ea\u53f3\u5411\u5de6"？<\/h4>\n
      \n
    • \u8bb0\u5f55\u5934\u662f"\u989d\u5916\u4fe1\u606f"\u4e0e"\u771f\u5b9e\u6570\u636e"\u7684\u5206\u754c\u7ebf，next_record \u6307\u5411\u4ea4\u754c\u5904；<\/li>\n
    • \u8bbe\u8ba1\u76ee\u6807：\u5411\u53f3\u76f4\u63a5\u8bfb\u6570\u636e（\u6309\u5217\u987a\u5e8f），\u5411\u5de6\u8bfb\u989d\u5916\u4fe1\u606f；<\/li>\n
    • \u53d8\u957f\u957f\u5ea6\u5217\u8868\u3001NULL \u4f4d\u56fe\u90fd\u9006\u5e8f\u5b58\u653e，\u6b63\u662f\u4e3a\u4e86\u914d\u5408"\u5411\u5de6\u89e3\u6790"\u7684\u65b9\u5411\u3002<\/li>\n<\/ul>\n

      3.3 NULL \u4f4d\u56fe\u91cc\u7684 bit，\u600e\u4e48\u77e5\u9053\u5bf9\u5e94\u54ea\u4e00\u5217？<\/h4>\n

      \u9760\u8868\u7ed3\u6784\u5143\u6570\u636e，\u4e0d\u9700\u8981\u5728\u884c\u5185\u989d\u5916\u5b58\u5217\u53f7：<\/p>\n

    • \u8868\u7ed3\u6784（\u5217\u5b9a\u4e49\u987a\u5e8f\u3001\u54ea\u4e9b\u5217\u53ef\u7a7a\u3001\u54ea\u4e9b\u662f\u53d8\u957f）\u4fdd\u5b58\u5728\u6570\u636e\u5b57\u5178\u4e2d，\u7528\u6237\u8868\u7684 .ibd \u91cc\u8fd8\u6709\u4e00\u4efd SDI \u9875\u4f5c\u4e3a\u8868\u7ed3\u6784\u7684 JSON \u5197\u4f59\u526f\u672c；<\/li>\n
    • \u89e3\u6790\u4e00\u884c\u65f6，\u4ece\u6570\u636e\u5b57\u5178\u62ff\u5230"\u53ef\u7a7a\u5217\u6e05\u5355（\u6309\u5b9a\u4e49\u987a\u5e8f）"；<\/li>\n
    • \u4f4d\u56fe\u6309\u9006\u5e8f\u4e0e\u53ef\u7a7a\u5217\u4e00\u4e00\u5bf9\u5e94：\u7b2c k \u4e2a\u53ef\u7a7a\u5217\u5bf9\u5e94\u4f4d\u56fe\u5012\u6570\u7b2c k \u4f4d（\u4ece\u53f3\u5f80\u5de6\u6570）；<\/li>\n
    • \u8be5 bit \u4e3a 1 \u2192 \u8be5\u5217\u4e3a NULL，\u771f\u5b9e\u6570\u636e\u4e2d\u4e0d\u5360\u7a7a\u95f4；\u4e3a 0 \u2192 \u6b63\u5e38\u53d6\u503c\u3002<\/li>\n

      \u597d\u5904：\u65e2\u662f\u7a7a\u95f4\u8282\u7701（NULL \u4e0d\u5360\u76d8），\u4e5f\u662f\u8bed\u4e49\u7cbe\u786e（\u7528\u4f4d\u56fe\u533a\u5206"NULL"\u4e0e\u503c\u4e3a"NULL"，\u4e0d\u4f1a\u6df7\u6dc6）\u3002<\/p>\n

      \n

      \u56db\u3001\u53d8\u957f\u5b57\u6bb5\u957f\u5ea6\u5217\u8868<\/h3>\n

      4.1 \u54ea\u4e9b\u5217\u7b97"\u53d8\u957f\u5b57\u6bb5"<\/h4>\n\n\u7c7b\u578b\u662f\u5426\u53d8\u957f<\/tr>\n\n\n\n\n
      VARCHAR \/ VARBINARY \/ TEXT \/ BLOB<\/td>\n\u2705 \u5fc5\u4e3a\u53d8\u957f<\/td>\n<\/tr>\n
      CHAR(N)（\u5355\u5b57\u8282\u5b57\u7b26\u96c6，\u5982 latin1）<\/td>\n\u274c \u5b9a\u957f（\u6309 N \u5b57\u8282）<\/td>\n<\/tr>\n
      CHAR(N)（\u591a\u5b57\u8282\u5b57\u7b26\u96c6，\u5982 utf8mb4）<\/td>\n\u26a0\ufe0f \u5f53\u6700\u5927\u5b57\u8282\u957f\u5ea6\u53ef\u80fd\u8d85\u8fc7 255 \u5b57\u8282\u65f6\u6309\u53d8\u957f\u5904\u7406（utf8mb4 \u4e0b\u5373 N>63）；\u5426\u5219\u4ecd\u5b9a\u957f<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u3002<\/span><\/p>\n

      4.2 1~2 \u5b57\u8282\u957f\u5ea6\u89c4\u5219<\/h4>\n

      \u53d8\u957f\u5b57\u6bb5\u957f\u5ea6\u5217\u8868\u9006\u5e8f\u5b58\u653e：\u7b2c\u4e00\u4e2a\u53d8\u957f\u5217\u7684\u957f\u5ea6\u5728\u5217\u8868\u6700\u53f3\u7aef\u3002\u6bcf\u4e2a\u5b57\u6bb5\u957f\u5ea6\u5360 1 \u6216 2 \u5b57\u8282，\u5224\u5b9a\u89c4\u5219：<\/p>\n

    • \u8be5\u5217\u6700\u5927\u957f\u5ea6 \u2264 255 \u5b57\u8282 \u2192 \u56fa\u5b9a\u7528 1 \u5b57\u8282\u8bb0\u5f55（\u65e0\u9700\u6807\u5fd7）；<\/li>\n
    • \u8be5\u5217\u53ef\u80fd\u8d85\u8fc7 255 \u5b57\u8282 \u2192 \u7528 2 \u5b57\u8282\u8bb0\u5f55，\u4e14\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u6700\u9ad8\u4f4d（MSB）\u7f6e 1 \u4f5c\u4e3a\u6807\u5fd7\u4f4d\u3002<\/li>\n

      （ InnoDB\u89c4\u5b9a\u6309\u7167\u78c1\u76d8\u6309\u7167\u5927\u7aef\u5b58\u50a8，\u4f46\u662f\u5355\u4e2a\u5b57\u8282\u5185\u65e0\u8bba\u5927\u5c0f\u7aef\u90fd\u662f MSB –> LSB，\u4f5c\u8005\u72af\u8822\u4e86\u00a0)<\/span><\/p>\n

      \u5b58\u50a8\u793a\u4f8b：\u67d0\u53d8\u957f\u5217\u5b9e\u9645\u957f\u5ea6 = 257 \u5b57\u8282（0x0101，>255）
      \n\u2192 2 \u5b57\u8282\u8868\u793a：0000 0001 1000 0001<\/p>\n

      \u8bfb\u53d6：\u5148\u8bfb\u7b2c\u4e00\u5b57\u8282（\u81ea\u53f3\u5411\u5de6）1000 0001 ，\u53d1\u73b0\u6700\u9ad8\u4f4d\u662f 1 \u2192 \u8fd9\u662f 2 \u5b57\u8282\u8868\u793a（InnoDB\u89c4\u5b9a\u5b58\u50a8\u65b9\u5f0f\u4e3a\u5927\u7aef）
      \n \u2192 \u957f\u5ea6 = (000 0001) << 8 | 0000 0001 = 0x101 = 257<\/p>\n

      \u957f\u5ea6 = (\u7b2c\u4e00\u5b57\u8282\u7684\u4f4e 7 \u4f4d) << 8 | \u7b2c\u4e8c\u5b57\u8282\u7684 8 \u4f4d<\/p>\n

      4.3 \u95ee：2 \u5b57\u8282\u80fd\u5230 2\u00b9\u2075-1 ，\u5927\u4e8e 16KB （\u4e00\u4e2a\u9875\u7684\u5927\u5c0f），\u4e00\u4e2a\u9875\u4f1a\u4e0d\u4f1a\u8fde\u4e00\u884c\u4e5f\u653e\u4e0d\u4e0b？<\/h4>\n

      InnoDB \u660e\u786e\u89c4\u5b9a：\u4e00\u4e2a\u9875\u81f3\u5c11\u8981\u80fd\u653e\u4e0b\u4e24\u884c\u8bb0\u5f55（\u5426\u5219 B+Tree \u6bcf\u9875\u53ea\u6709 1 \u6761\u8bb0\u5f55，\u6811\u5c31\u9000\u5316\u6210\u94fe\u8868）\u3002\u7531\u6b64\u63a8\u51fa\u884c\u5927\u5c0f\u7ea6\u675f：<\/p>\n

      16KB \u9875 \u2192 \u884c\u6700\u5927 \u2248 \u534a\u9875 \u2248 8KB（\u5b9e\u9645\u7ea6 8126 \u5b57\u8282，\u8fd8\u8981\u6263\u884c\u5f00\u9500）<\/p>\n

      \u5bf9\u4e8e\u8d85\u957f\u5b57\u6bb5，dynamic \u7684\u6ea2\u51fa\u5904\u7406\u662f\u5c06\u6570\u636e\u653e\u5728\u6ea2\u51fa\u9875\u4e2d，\u5bf9\u5e94\u5b57\u6bb5\u53ea\u5b58\u653e\u6ea2\u51fa\u9875\u7684 20 \u5b57\u8282\u5730\u5740<\/p>\n

      DYNAMIC \u884c\u683c\u5f0f：\u8d85\u957f\u5b57\u6bb5（\u5982 TEXT\/BLOB\/LONGTEXT）
      \n\u250c\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2510
      \n\u2502 \u884c\u5185：20 \u5b57\u8282\u6307\u9488 \u2502 \u2500\u2500\u25b6 \u6307\u5411\u6ea2\u51fa\u9875
      \n\u2502 （\u8be5\u5217\u5b8c\u6574\u6570\u636e\u4e0d\u7559\u5728\u884c\u5185） \u2502
      \n\u2514\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2518<\/p>\n

      \u6ea2\u51fa\u9875 = BLOB \u9875（FIL_PAGE_TYPE_BLOB），\u6570\u636e\u8fc7\u5927\u65f6\u53ef\u7531\u591a\u4e2a\u6ea2\u51fa\u9875\u94fe\u5f0f\u5b58\u653e<\/p>\n

        \n
      • \u7279\u70b9：\u6574\u5217\u6570\u636e\u5168\u90e8\u653e\u5165\u6ea2\u51fa\u9875，\u884c\u5185\u53ea\u4fdd\u7559 20 \u5b57\u8282\u7684\u6307\u9488（\u6307\u5411\u6ea2\u51fa\u9875\u4f4d\u7f6e）；<\/li>\n
      • \u8fd9\u6837\u884c\u5927\u5c0f\u59cb\u7ec8\u53ef\u63a7，\u4e0d\u4f1a\u56e0\u4e3a\u4e00\u4e2a\u5927\u5b57\u6bb5\u6491\u7834"\u534a\u9875"\u7ea6\u675f；<\/li>\n
      • \u6ea2\u51fa\u4e0e\u5426\u7684\u672c\u8d28\u5224\u65ad：\u8be5\u5217\u5b9e\u9645\u957f\u5ea6\u662f\u5426\u8d85\u8fc7\u884c\u5185\u53ef\u5bb9\u7eb3\u7684\u9608\u503c；\u6ea2\u51fa\u540e\u884c\u5185\u8868\u73b0\u4e3a\u6307\u9488，\u53d8\u957f\u957f\u5ea6\u5217\u8868\u8bb0\u5f55\u7684\u662f\u884c\u5185\u5b9e\u9645\u4fdd\u7559\u90e8\u5206\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n
        \n

        \u4e94\u3001COMPACT \u884c\u683c\u5f0f：<\/h3>\n

        5.1 \u4e0e DYNAMIC \u7684\u552f\u4e00\u533a\u522b<\/h4>\n

        COMPACT \u4e0e DYNAMIC \u7684\u989d\u5916\u4fe1\u606f\u3001NULL \u5217\u8868\u3001\u8bb0\u5f55\u5934\u5b8c\u5168\u4e00\u81f4，\u552f\u4e00\u7684\u5dee\u522b\u5728\u8d85\u957f\u5b57\u6bb5\u7684\u5904\u7406：<\/p>\n\n\u884c\u683c\u5f0f\u8d85\u957f\u5b57\u6bb5\u884c\u5185\u4fdd\u7559\u6ea2\u51fa\u90e8\u5206\u884c\u5185\u989d\u5916\u5f00\u9500<\/tr>\n\n\n\n
        COMPACT<\/td>\n\u524d 768 \u5b57\u8282<\/td>\n\u5176\u4f59\u653e\u5165\u6ea2\u51fa\u9875<\/td>\n20 \u5b57\u8282\u6307\u9488<\/td>\n<\/tr>\n
        DYNAMIC<\/td>\n0 \u5b57\u8282（\u5168\u6ea2\u51fa）<\/td>\n\u5168\u90e8\u653e\u5165\u6ea2\u51fa\u9875<\/td>\n20 \u5b57\u8282\u6307\u9488<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        COMPACT：\u884c\u5185 = [\u524d 768 \u5b57\u8282\u6570\u636e][20 \u5b57\u8282\u6ea2\u51fa\u9875\u6307\u9488]
        \n \u5373"768 + 20"，\u5269\u4f59\u90e8\u5206\u5728\u6ea2\u51fa\u9875<\/p>\n

        5.2 768 \u5b57\u8282\u524d\u7f00\u7684\u4ef7\u503c<\/h4>\n
          \n
        • \u4fdd\u7559\u4e86\u957f\u5b57\u6bb5\u7684\u524d 768 \u5b57\u8282\u5728\u884c\u5185，\u53ef\u652f\u6301\u524d\u7f00\u7d22\u5f15\/\u524d\u7f00\u5339\u914d（\u4e0d\u5fc5\u6bcf\u6b21\u90fd\u8fdb\u6ea2\u51fa\u9875）；<\/li>\n
        • \u5bf9"\u5c0f\u5b57\u6bb5\u6df7\u5408\u5927\u5b57\u6bb5"\u7684\u8868，\u67d0\u4e9b\u67e5\u8be2\u53ef\u4ee5\u53ea\u8bfb\u884c\u5185\u524d\u7f00\u5c31\u8fd4\u56de\u3002<\/li>\n<\/ul>\n

          5.3 \u4f55\u65f6\u9009 COMPACT<\/h4>\n
            \n
          • \u9700\u8981\u517c\u5bb9\u8001\u7248\u672c\u884c\u4e3a；<\/li>\n
          • \u4e1a\u52a1\u4e0a\u5bf9\u957f\u6587\u672c\u6709\u524d\u7f00\u67e5\u8be2\u9700\u6c42；<\/li>\n
          • \u9ed8\u8ba4\u5efa\u8bae\u4ecd\u7528 DYNAMIC（\u5b98\u65b9\u9ed8\u8ba4），\u9664\u975e\u6709\u660e\u786e\u7406\u7531\u3002<\/li>\n<\/ul>\n
            \n

            \u516d\u3001COMPRESSED \u884c\u683c\u5f0f：DYNAMIC + \u538b\u7f29<\/h3>\n

            6.1 \u538b\u7f29\u539f\u7406<\/h4>\n
              \n
            • \u884c\u7ed3\u6784\u4e0e DYNAMIC \u5b8c\u5168\u76f8\u540c（\u5305\u62ec\u6ea2\u51fa\u5904\u7406\u65b9\u5f0f）；<\/li>\n
            • \u989d\u5916\u505a\u7684\u4e8b：\u5bf9\u6570\u636e（\u542b\u9875）\u8fdb\u884c zlib \u538b\u7f29，\u51cf\u5c11\u78c1\u76d8\u7a7a\u95f4\u5360\u7528；<\/li>\n
            • \u901a\u8fc7 ROW_FORMAT=COMPRESSED + KEY_BLOCK_SIZE=N \u542f\u7528（N \u4e3a\u538b\u7f29\u9875\u5927\u5c0f）\u3002<\/li>\n<\/ul>\n

              6.2 \u65f6\u95f4\u6362\u7a7a\u95f4<\/h4>\n\n\u6536\u76ca\u4ee3\u4ef7<\/tr>\n\n\n\n
              \u78c1\u76d8\u5360\u7528\u663e\u8457\u4e0b\u964d（\u538b\u7f29\u7387\u53d6\u51b3\u4e8e\u6570\u636e\u91cd\u590d\u5ea6）<\/td>\nCPU \u538b\u7f29\/\u89e3\u538b\u5f00\u9500<\/td>\n<\/tr>\n
              \u5185\u5b58\u4e2d\u538b\u7f29\u9875\u53ef\u4fdd\u6301\u538b\u7f29\u72b6\u6001，\u95f4\u63a5\u7701\u5185\u5b58<\/td>\n\u968f\u673a\u8bbf\u95ee\u53d8\u6162（\u6bcf\u6b21\u8bfb\u8981\u89e3\u538b）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

              6.3 \u6ce8\u610f\u70b9<\/h4>\n
                \n
              • \u9002\u5408\u7a7a\u95f4\u7d27\u5f20\u3001CPU \u5bcc\u4f59\u3001\u4ee5\u987a\u5e8f\u626b\u63cf\u4e3a\u4e3b\u7684\u573a\u666f（\u5982\u5f52\u6863\u8868）；<\/li>\n
              • \u4e0d\u9002\u5408\u5199\u653e\u5927\u4e25\u91cd\u3001CPU \u5df2\u662f\u74f6\u9888\u7684 OLTP \u6838\u5fc3\u8868；<\/li>\n
              • \u538b\u7f29\u9875\u7c7b\u578b\u4e3a FIL_PAGE_COMPRESSED，\u4e0e 8.0 \u7684"\u8868\u7a7a\u95f4\u9875\u538b\u7f29（COMPRESSION='zlib'）"\u662f\u4e0d\u540c\u673a\u5236，\u4e0d\u8981\u6df7\u6dc6\u3002<\/li>\n<\/ul>\n
                \n

                \u4e03\u3001REDUNDANT \u884c\u683c\u5f0f：\u5386\u53f2\u9057\u7559<\/h3>\n
                  \n
                • InnoDB \u6700\u65e9\u7684\u683c\u5f0f（MySQL 4.1 \u65f6\u4ee3），\u53ea\u4e3a\u517c\u5bb9\u65e7\u8868\u800c\u5b58\u5728，\u65b0\u8868\u4e0d\u5e94\u4f7f\u7528；<\/li>\n
                • \u8bfb\u53d6\u6548\u7387\u3001\u7a7a\u95f4\u5229\u7528\u7387\u90fd\u4e0d\u5982 COMPACT \u7cfb\u5217，\u5b98\u65b9\u4e0d\u5efa\u8bae\u65b0\u8868\u4f7f\u7528\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"

                  \u4e00\u3001\u884c\u683c\u5f0f\u603b\u89c8
                  \n1.1 \u56db\u79cd\u884c\u683c\u5f0f\u4e0e\u9ed8\u8ba4\u503c
                  \n\u884c\u683c\u5f0f\u51fa\u73b0\u65f6\u4ee3\u662f\u5426\u9ed8\u8ba4\u603b\u4f53\u5b9a\u4f4dREDUNDANTInnoDB \u6700\u65e9（MySQL 4.1 \u65f6\u4ee3）\u274c\u5386\u53f2\u9057\u7559，\u4ec5\u517c\u5bb9\u65e7\u8868COMPACTMySQL 5.0 \u5f15\u51655.6 \u9ed8\u8ba45.x \u65f6\u4ee3\u7684\u4e3b\u6d41\u683c\u5f0fDYNAMICMySQL 5.7 \u5f15\u51655.7 \/ 8.0 \u9ed8\u8ba4\u5f53\u524d\u9ed8\u8ba4，\u957f\u5b57\u6bb5\u5168\u91cf\u6ea2\u51faCOMPRESSEDMySQL 5.7 \u5f15\u5165\u274cDYNAMIC \u9875\u7ea7\u538b\u7f29，\u65f6\u95f4\u6362\u7a7a\u95f4 <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[99,190,100],"topic":[],"class_list":["post-122988","post","type-post","status-publish","format-standard","hentry","category-server","tag-java","tag-190","tag-100"],"yoast_head":"\nInnoDB \u884c\u683c\u5f0f\u8be6\u89e3\uff1aDYNAMIC \/ COMPACT \/ COMPRESSED \/ REDUNDANT - 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