{"id":118327,"date":"2026-10-26T23:00:38","date_gmt":"2026-10-26T15:00:38","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/118327.html"},"modified":"2026-10-26T23:00:38","modified_gmt":"2026-10-26T15:00:38","slug":"%e3%80%90%e8%ae%a1%e7%ae%97%e5%9f%ba%e7%a1%80%ef%bd%9cmysql16%e3%80%91%e3%80%90%e5%b7%a5%e7%a8%8b%e5%ae%9e%e6%88%98%e3%80%91%e8%a1%8c%e9%94%81-%e9%97%b4%e9%9a%99%e9%94%81-%e6%ad%bb%e9%94%81%e5%a4%8d","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/118327.html","title":{"rendered":"\u3010\u8ba1\u7b97\u57fa\u7840\uff5cMySQL16\u3011\u3010\u5de5\u7a0b\u5b9e\u6218\u3011\u884c\u9501\/\u95f4\u9699\u9501\/\u6b7b\u9501\u590d\u73b0\u6392\u67e5"},"content":{"rendered":"

\u3010\u8ba1\u7b97\u57fa\u7840｜MySQL16\u3011\u3010\u5de5\u7a0b\u5b9e\u6218\u3011\u884c\u9501\/\u95f4\u9699\u9501\/\u6b7b\u9501\u590d\u73b0\u6392\u67e5<\/h2>\n

\u4e0a\u4e00\u7bc7\u628a\u4e8b\u52a1\u9694\u79bb\u548c MVCC \u7528\u5b9e\u9a8c\u8dd1\u901a\u4e86\u3002\u8fd9\u4e00\u7bc7\u662f\u5b83\u7684"\u9501\u7bc7\u5b9e\u6218"\u2014\u2014\u7ebf\u4e0a\u6700\u5e38\u89c1\u7684\u4e24\u7c7b\u4e8b\u6545：\u4e00\u6761 UPDATE \u628a\u6574\u4e2a\u5e93\u5199\u963b\u585e\u4e86，\u4ee5\u53ca\u62a5\u9519 ERROR 1213 (40001): Deadlock found when trying to get lock\u3002\u524d\u8005\u5341\u6709\u516b\u4e5d\u662f"WHERE \u6ca1\u8d70\u7d22\u5f15，\u884c\u9501\u9000\u5316\u6210\u8868\u9501"，\u540e\u8005\u662f\u4e24\u4e2a\u4e8b\u52a1\u52a0\u9501\u987a\u5e8f\u4ea4\u53c9\u3002<\/p>\n

\u8fd9\u7bc7\u7ee7\u7eed\u5728 Docker MySQL 8 \u4e0a\u5f00\u4e24\u4e2a\u4f1a\u8bdd A\/B，\u628a\u8bb0\u5f55\u9501\u3001\u95f4\u9699\u9501\u3001Next-Key Lock\u3001\u65e0\u7d22\u5f15\u9501\u5168\u8868\u3001\u7ecf\u5178\u4ea4\u53c9\u6b7b\u9501\u3001\u95f4\u9699\u9501+\u63d2\u5165\u6b7b\u9501\u5168\u90e8\u590d\u73b0\u4e00\u904d，\u5e76\u4e14\u7528 performance_schema.data_locks \u628a InnoDB \u5b9e\u9645\u52a0\u4e86\u4ec0\u4e48\u9501\u62cd\u4e0b\u6765，\u6700\u540e\u8bfb\u5b8c\u6574\u7684 SHOW ENGINE INNODB STATUS \u6b7b\u9501\u62a5\u544a\u9010\u884c\u89e3\u8bfb\u3002<\/p>\n

\u73af\u5883：Docker MySQL 8.0.46，RR \u9694\u79bb\u7ea7\u522b\u3002\u8868 t(id INT PK, idx_key INT, val INT, status VARCHAR(20))，idx_key \u666e\u901a\u7d22\u5f15，\u521d\u59cb\u6570\u636e (10,10,10),(20,20,20),(30,30,30),(40,40,40)，status \u9ed8\u8ba4 active\u3002<\/p>\n

\n

\u4e00\u3001\u5148\u8ba4\u4e24\u4e2a\u770b\u9501\u7684"\u663e\u5fae\u955c"<\/h3>\n

\u5149\u9760"\u4f1a\u4e0d\u4f1a\u963b\u585e"\u731c\u9501\u662f\u731c\u4e0d\u51c6\u7684\u3002MySQL 8 \u6709\u4e24\u5f20\u73b0\u6210\u7684\u8868，\u80fd\u628a InnoDB \u5185\u90e8\u52a0\u7684\u9501\u76f4\u63a5 dump \u51fa\u6765：<\/p>\n

— \u5f53\u524d\u6240\u6709\u9501（\u770b LOCK_TYPE \/ LOCK_MODE \/ LOCK_DATA）<\/span>
\nSELECT<\/span> ENGINE_TRANSACTION_ID,<\/span> LOCK_TYPE,<\/span> LOCK_MODE,<\/span> LOCK_DATA
\nFROM<\/span> performance_schema.<\/span>data_locks;<\/span><\/p>\n

— \u5f53\u524d\u9501\u7b49\u5f85\u5173\u7cfb（\u8c01\u5728\u7b49\u8c01）<\/span>
\nSELECT<\/span> *<\/span> FROM<\/span> performance_schema.<\/span>data_lock_waits;<\/span><\/p>\n

LOCK_MODE \u8fd9\u4e00\u5217\u662f\u672c\u7bc7\u7684\u547d\u6839\u5b50，\u5148\u628a\u5b83\u7684\u503c\u548c\u542b\u4e49\u9489\u6b7b：<\/p>\n\nLOCK_MODE\u9501\u7c7b\u578b\u542b\u4e49<\/tr>\n\n\n\n\n\n
X<\/td>\nNext-Key Lock<\/td>\n\u8bb0\u5f55\u9501 + \u524d\u9762\u95f4\u9699\u9501（InnoDB \u9ed8\u8ba4\u884c\u9501\u7b97\u6cd5）<\/td>\n<\/tr>\n
X,REC_NOT_GAP<\/td>\n\u8bb0\u5f55\u9501<\/td>\n\u53ea\u9501\u8fd9\u4e00\u6761\u8bb0\u5f55，\u4e0d\u9501\u95f4\u9699<\/td>\n<\/tr>\n
X,GAP<\/td>\n\u95f4\u9699\u9501<\/td>\n\u53ea\u9501\u8bb0\u5f55\u524d\u9762\u7684\u95f4\u9699，\u4e0d\u9501\u8bb0\u5f55\u672c\u8eab<\/td>\n<\/tr>\n
X,GAP,INSERT_INTENTION<\/td>\n\u63d2\u5165\u610f\u5411\u9501<\/td>\nINSERT \u524d\u5728\u95f4\u9699\u4e0a\u7b49\u5f85<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

🔴 \u8bb0\u4f4f\u8fd9\u56db\u79cd mode，\u540e\u9762\u6bcf\u6b21\u5b9e\u9a8c\u6211\u4eec\u90fd\u62cd\u4e00\u5f20 data_locks \u5bf9\u7167\u3002<\/p>\n

\n

\u4e8c\u3001\u5b9e\u6218 1：\u8bb0\u5f55\u9501（Record Lock）<\/h3>\n

\u7ed3\u8bba：\u552f\u4e00\u7d22\u5f15\u7b49\u503c\u67e5\u8be2\u547d\u4e2d\u8bb0\u5f55，InnoDB \u53ea\u7ed9\u8fd9\u4e00\u884c\u52a0 X,REC_NOT_GAP，\u522b\u7684\u884c\u968f\u4fbf\u52a8\u3002<\/p>\n\n\u6b65\u9aa4\u4f1a\u8bdd A\u4f1a\u8bdd B<\/tr>\n\n\n\n\n\n\n
1<\/td>\nBEGIN;<\/td>\n<\/td>\n<\/tr>\n
2<\/td>\nSELECT * FROM t WHERE id=20 FOR UPDATE;<\/td>\n<\/td>\n<\/tr>\n
3<\/td>\n<\/td>\nUPDATE t SET val=1 WHERE id=10;（\u6ca1\u950110，\u5e94\u6210\u529f）<\/td>\n<\/tr>\n
4<\/td>\n<\/td>\nUPDATE t SET val=1 WHERE id=20;（\u9501\u4e8620，\u5e94\u963b\u585e）<\/td>\n<\/tr>\n
5<\/td>\nCOMMIT;<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u771f\u5b9e\u8f93\u51fa：<\/p>\n

[A] BEGIN
\n[A] SELECT * FROM t WHERE id=20 FOR UPDATE
\n | id | idx_key | val | status
\n | 20 | 20 | 20 | active<\/p>\n

A \u6301\u9501\u671f\u95f4\u62cd data_locks：<\/p>\n

ENGINE_TRANSACTION_ID | LOCK_TYPE | LOCK_MODE | LOCK_DATA
\n2678 | TABLE | IX | NULL
\n2678 | RECORD | X,REC_NOT_GAP | 20<\/p>\n

B \u7684\u64cd\u4f5c：<\/p>\n

[B] UPDATE t SET val=1 WHERE id=10
\n -> OK (rowcount=1) <– \u2705 id=10 \u6ca1\u88ab\u9501，\u76f4\u63a5\u6210\u529f
\n[B] UPDATE t SET val=1 WHERE id=20
\n -> \u963b\u585e\u4e2d（\u88ab\u8bb0\u5f55\u9501\u6321\u4f4f），4s \u8d85\u65f6 <– 🔴 id=20 \u88ab X,REC_NOT_GAP \u9501\u4f4f
\n[A] COMMIT
\n[B] UPDATE id=20 -> \u6210\u529f <– A \u4e00\u63d0\u4ea4，B \u7acb\u523b\u901a\u8fc7<\/p>\n

\u89e3\u8bfb：<\/p>\n

    \n
  • LOCK_TYPE=TABLE, IX：\u8868\u7ea7\u610f\u5411\u6392\u4ed6\u9501，\u58f0\u660e"\u6211\u8981\u5728\u67d0\u4e9b\u884c\u4e0a\u52a0 X \u9501"\u3002<\/li>\n
  • LOCK_TYPE=RECORD, LOCK_MODE=X,REC_NOT_GAP, LOCK_DATA=20：\u7cbe\u51c6\u9501\u5728 id=20 \u8fd9\u4e00\u6761\u4e3b\u952e\u8bb0\u5f55\u4e0a，REC_NOT_GAP \u660e\u786e\u8868\u793a\u4e0d\u9501\u95f4\u9699\u3002\u6240\u4ee5 B \u63d2 id=25 \u90fd\u4e0d\u4f1a\u88ab\u6321（\u5f53\u7136\u8fd9\u91cc\u6ca1\u63d2）\u3002<\/li>\n<\/ul>\n
    \n

    \u4e09\u3001\u5b9e\u6218 2：\u95f4\u9699\u9501（Gap Lock）<\/h3>\n

    \u7ed3\u8bba：\u552f\u4e00\u7d22\u5f15\u7b49\u503c\u67e5\u8be2\u672a\u547d\u4e2d，InnoDB \u52a0 X,GAP，\u9501\u4f4f\u8fd9\u6761\u8bb0\u5f55\u524d\u9762\u7684\u5f00\u533a\u95f4，\u522b\u4eba\u63d2\u4e0d\u8fdb\u6765\u3002<\/p>\n\n\u6b65\u9aa4\u4f1a\u8bdd A\u4f1a\u8bdd B<\/tr>\n\n\n\n\n\n\n
    1<\/td>\nBEGIN;<\/td>\n<\/td>\n<\/tr>\n
    2<\/td>\nSELECT * FROM t WHERE id=25 FOR UPDATE;（\u67e5\u4e0d\u5230）<\/td>\n<\/td>\n<\/tr>\n
    3<\/td>\n<\/td>\nINSERT INTO t (id,idx_key,val) VALUES (25,25,25);（\u5e94\u963b\u585e）<\/td>\n<\/tr>\n
    4<\/td>\n<\/td>\nINSERT INTO t (id,idx_key,val) VALUES (35,35,35);（\u4e0d\u5728\u95f4\u9699，\u5e94\u6210\u529f）<\/td>\n<\/tr>\n
    5<\/td>\nCOMMIT;<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \u771f\u5b9e\u8f93\u51fa：<\/p>\n

    [A] BEGIN
    \n[A] SELECT * FROM t WHERE id=25 FOR UPDATE
    \n | id | idx_key | val | status （\u7a7a\u7ed3\u679c\u96c6，25 \u4e0d\u5b58\u5728）<\/p>\n

    A \u6301\u9501\u671f\u95f4\u62cd data_locks：<\/p>\n

    ENGINE_TRANSACTION_ID | LOCK_TYPE | LOCK_MODE | LOCK_DATA
    \n2683 | TABLE | IX | NULL
    \n2683 | RECORD | X,GAP | 30<\/p>\n

    B \u7684\u64cd\u4f5c：<\/p>\n

    [B] INSERT (25,25,25);
    \n -> \u963b\u585e\u4e2d（\u88ab\u95f4\u9699\u9501\u6321\u4f4f），4s \u8d85\u65f6 <– 🔴 25 \u843d\u5728 (20,30) \u95f4\u9699\u91cc
    \n[B] INSERT (35,35,35);
    \n -> （A COMMIT \u540e）\u6210\u529f <– \u2705 35 \u4e0d\u5728 (20,30)，\u4e0d\u51b2\u7a81<\/p>\n

    \u89e3\u8bfb：<\/p>\n

      \n
    • id=25 \u5728\u4e3b\u952e\u7d22\u5f15\u4e0a\u843d\u5728 20 \u548c 30 \u4e4b\u95f4\u3002\u7b49\u503c\u67e5\u4e0d\u5230，InnoDB \u7ed9"30 \u8fd9\u6761\u8bb0\u5f55\u524d\u9762\u7684\u95f4\u9699"\u52a0 X,GAP，\u5373\u9501\u4f4f\u5f00\u533a\u95f4 (20, 30)\u3002<\/li>\n
    • B \u60f3\u63d2 25，\u6b63\u597d\u649e\u8fdb (20,30)，\u88ab\u95f4\u9699\u9501\u6321\u4f4f；\u63d2 35 \u843d\u5728 (30,40)，\u8ddf\u8fd9\u4e2a\u95f4\u9699\u9501\u6ca1\u5173\u7cfb，\u6210\u529f\u3002<\/li>\n<\/ul>\n

      \u26a0\ufe0f \u95f4\u9699\u9501\u7684\u4e00\u4e2a\u53cd\u76f4\u89c9\u70b9：\u95f4\u9699\u9501\u4e4b\u95f4\u662f\u517c\u5bb9\u7684\u2014\u2014A \u9501\u4e86 (20,30)，B \u4e5f\u80fd\u518d\u9501 (20,30)，\u8c01\u90fd\u4e0d\u62e6\u8c01\u3002\u5b83\u53ea\u62e6"\u5f80\u8fd9\u4e2a\u95f4\u9699\u91cc\u63d2\u6570\u636e"\u7684 INSERT\u3002\u8fd9\u4e2a\u7279\u6027\u76f4\u63a5\u5bfc\u81f4\u5b9e\u6218 6 \u7684\u6b7b\u9501\u3002<\/p>\n

      \n

      \u56db\u3001\u5b9e\u6218 3：Next-Key Lock<\/h3>\n

      \u7ed3\u8bba：\u8303\u56f4\u5f53\u524d\u8bfb，InnoDB \u52a0 Next-Key Lock = \u8bb0\u5f55\u9501 + \u95f4\u9699\u9501，\u9501\u4f4f\u6574\u4e2a\u5de6\u5f00\u53f3\u95ed\u533a\u95f4\u3002<\/p>\n\n\u6b65\u9aa4\u4f1a\u8bdd A\u4f1a\u8bdd B<\/tr>\n\n\n\n\n\n\n\n
      1<\/td>\nBEGIN;<\/td>\n<\/td>\n<\/tr>\n
      2<\/td>\nSELECT * FROM t WHERE id>20 AND id<40 FOR UPDATE;<\/td>\n<\/td>\n<\/tr>\n
      3<\/td>\n<\/td>\nINSERT (25,…) \/ INSERT (35,…)（\u5e94\u963b\u585e）<\/td>\n<\/tr>\n
      4<\/td>\n<\/td>\nUPDATE … WHERE id=30（30 \u5728\u8303\u56f4\u91cc，\u5e94\u963b\u585e）<\/td>\n<\/tr>\n
      5<\/td>\n<\/td>\nUPDATE … WHERE id=40（40 \u4e0d\u5728 id<40，\u5e94\u6210\u529f）<\/td>\n<\/tr>\n
      6<\/td>\nCOMMIT;<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u771f\u5b9e\u8f93\u51fa：<\/p>\n

      [A] BEGIN
      \n[A] SELECT * FROM t WHERE id>20 AND id<40 FOR UPDATE
      \n | id | idx_key | val | status
      \n | 30 | 30 | 30 | active<\/p>\n

      A \u6301\u9501\u671f\u95f4\u62cd data_locks：<\/p>\n

      ENGINE_TRANSACTION_ID | LOCK_TYPE | LOCK_MODE | LOCK_DATA
      \n2715 | TABLE | IX | NULL
      \n2715 | RECORD | X,GAP | 40
      \n2715 | RECORD | X | 30<\/p>\n

      B \u7684\u64cd\u4f5c：<\/p>\n

      [B] INSERT (25,25,25) -> \u963b\u585e\u4e2d，3s \u8d85\u65f6 <– 🔴 25 \u843d\u5728 (20,30] \u95f4\u9699
      \n[B] INSERT (35,35,35) -> \u963b\u585e\u4e2d，3s \u8d85\u65f6 <– 🔴 35 \u843d\u5728 (30,40] \u95f4\u9699
      \n[B] UPDATE … WHERE id=30 -> \u963b\u585e\u4e2d，3s \u8d85\u65f6 <– 🔴 30 \u8fd9\u6761\u8bb0\u5f55\u672c\u8eab\u88ab X \u9501
      \n[B] UPDATE … WHERE id=40 -> OK (rowcount=1) <– \u2705 40 \u4e0d\u5728 id<40 \u8303\u56f4，\u6ca1\u88ab\u9501<\/p>\n

      \u89e3\u8bfb：<\/p>\n

        \n
      • LOCK_MODE=X（\u4e0d\u5e26 REC_NOT_GAP）\u5c31\u662f Next-Key Lock\u3002\u5bf9 id=30 \u8fd9\u6761\u8bb0\u5f55，\u9501\u7684\u662f (20, 30]\u3002<\/li>\n
      • LOCK_DATA=40, LOCK_MODE=X,GAP：\u5728 40 \u524d\u9762\u52a0\u95f4\u9699\u9501 (30, 40)，\u56e0\u4e3a\u8303\u56f4\u626b\u63cf\u8981"\u626b\u5230\u4e0d\u6ee1\u8db3\u6761\u4ef6\u7684\u7b2c\u4e00\u4e2a\u503c\u4e3a\u6b62"\u2014\u201440 \u662f\u7b2c\u4e00\u4e2a\u4e0d\u6ee1\u8db3 id<40 \u7684\u8bb0\u5f55，\u628a\u5b83\u524d\u9762\u7684\u95f4\u9699\u4e5f\u9501\u4f4f\u3002<\/li>\n
      • \u5408\u8d77\u6765\u5c31\u662f\u9501\u4f4f\u4e86 (20,30] \u548c (30,40]，\u6240\u4ee5 25\u300135 \u90fd\u63d2\u4e0d\u8fdb，30 \u4e5f\u6539\u4e0d\u4e86；40 \u662f\u5f00\u533a\u95f4\u8fb9\u754c\u5916，\u80fd\u6539\u3002<\/li>\n<\/ul>\n
        \n

        \u4e94\u3001\u5b9e\u6218 4：\u65e0\u7d22\u5f15\u4e3a\u4ec0\u4e48\u9501\u5168\u8868<\/h3>\n

        \u7ed3\u8bba：WHERE \u6761\u4ef6\u6ca1\u7d22\u5f15，\u6267\u884c\u5668\u5168\u8868\u626b\u63cf，\u628a\u626b\u8fc7\u7684\u6bcf\u4e00\u884c\u90fd\u52a0 X \u9501，\u6548\u679c\u7ea6\u7b49\u4e8e\u8868\u9501\u3002<\/p>\n

        5.1 \u5148\u590d\u73b0：status \u6ca1\u7d22\u5f15<\/h4>\n

        status \u5217\u4e00\u5f00\u59cb\u6ca1\u5efa\u7d22\u5f15\u3002A \u6267\u884c：<\/p>\n

        [A] BEGIN
        \n[A] UPDATE t SET val=1 WHERE status='active'
        \n -> OK (rowcount=4)<\/p>\n

        \u62cd data_locks：<\/p>\n

        ENGINE_TRANSACTION_ID | LOCK_TYPE | LOCK_MODE | LOCK_DATA
        \n2728 | TABLE | IX | NULL
        \n2728 | RECORD | X | supremum pseudo-record
        \n2728 | RECORD | X | 10
        \n2728 | RECORD | X | 20
        \n2728 | RECORD | X | 30
        \n2728 | RECORD | X | 40<\/p>\n

        🔴 \u770b LOCK_DATA：10\u300120\u300130\u300140 \u56db\u6761\u4e3b\u952e\u8bb0\u5f55\u5168\u88ab X \u9501\u4e86，\u8fde supremum pseudo-record（\u7d22\u5f15\u6700\u672b\u5c3e\u7684"\u54e8\u5175"）\u90fd\u9501\u4e86\u3002\u8fd9\u5c31\u662f\u5168\u8868\u9501\u3002<\/p>\n

        B \u7684\u64cd\u4f5c：<\/p>\n

        [B] UPDATE t SET val=2 WHERE id=10 -> \u963b\u585e\u4e2d，3s \u8d85\u65f6 <– 🔴 id=10 \u4e5f\u88ab\u9501
        \n[A] COMMIT
        \n[B] UPDATE id=10 -> \u6210\u529f <– A \u63d0\u4ea4\u540e\u624d\u901a<\/p>\n

        5.2 \u52a0\u7d22\u5f15\u540e\u5bf9\u6bd4<\/h4>\n

        CREATE<\/span> INDEX<\/span> idx_status ON<\/span> t(<\/span>status<\/span>)<\/span>;<\/span><\/p>\n

        \u518d\u8dd1\u540c\u6837\u7684 UPDATE t SET val=1 WHERE status='active'，\u62cd data_locks：<\/p>\n

        ENGINE_TRANSACTION_ID | LOCK_TYPE | LOCK_MODE | LOCK_DATA
        \n2740 | TABLE | IX | NULL
        \n2740 | RECORD | X | supremum pseudo-record
        \n2740 | RECORD | X | 'active', 10
        \n2740 | RECORD | X | 'active', 20
        \n2740 | RECORD | X | 'active', 30
        \n2740 | RECORD | X | 'active', 40
        \n2740 | RECORD | X,REC_NOT_GAP | 10
        \n2740 | RECORD | X,REC_NOT_GAP | 20
        \n2740 | RECORD | X,REC_NOT_GAP | 30
        \n2740 | RECORD | X,REC_NOT_GAP | 40<\/p>\n

        \u524d\u540e\u5bf9\u6bd4\u4e00\u53e5\u8bdd：<\/p>\n\n\u573a\u666f\u9501\u7684\u662fB \u63d2\u4e00\u6761 status='inactive'<\/tr>\n\n\n\n
        status \u65e0\u7d22\u5f15<\/td>\n\u5168\u8868 4 \u6761\u4e3b\u952e\u8bb0\u5f55 + supremum<\/td>\n\u88ab\u963b\u585e<\/td>\n<\/tr>\n
        status \u6709\u7d22\u5f15<\/td>\n\u53ea\u9501 secondary index \u4e0a status=\u2018active\u2019 \u7684 4 \u6761 + \u56de\u8868\u7684 4 \u6761<\/td>\n\u4ecd\u53d7 Next-Key \u95f4\u9699\u5f71\u54cd，\u4f46\u8303\u56f4\u7cbe\u786e\u591a\u4e86<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u26a0\ufe0f \u6ce8\u610f：\u5373\u4f7f\u52a0\u4e86\u7d22\u5f15，InnoDB \u5728 RR \u4e0b\u4ecd\u4f1a\u5bf9 secondary index \u52a0 Next-Key Lock（\u5e26\u95f4\u9699），\u6240\u4ee5\u63d2\u4e00\u4e2a\u5168\u65b0\u7684 status \u503c\u6709\u65f6\u4e5f\u4f1a\u88ab\u6321\u4f4f\u3002\u4f46\u5173\u952e\u662f\u2014\u2014\u6709\u7d22\u5f15\u65f6\u9501\u7684\u8303\u56f4\u662f"\u5339\u914d\u884c+\u76f8\u5173\u95f4\u9699"，\u6ca1\u7d22\u5f15\u65f6\u662f"\u5168\u8868\u6240\u6709\u884c"\u3002\u5927\u8868\u4e0a\u540e\u8005\u5c31\u662f\u751f\u4ea7\u4e8b\u6545\u3002<\/p>\n

        🔴 \u9762\u8bd5\u9898\u7b54\u6848：UPDATE\/DELETE \u7684 WHERE \u6761\u4ef6\u6ca1\u8d70\u7d22\u5f15，InnoDB \u4f1a\u5168\u8868\u626b\u63cf\u5e76\u5bf9\u626b\u63cf\u5230\u7684\u6bcf\u4e00\u884c\u52a0 X \u9501；\u867d\u7136 Server \u5c42\u4f1a\u8fc7\u6ee4\u4e0d\u5339\u914d\u7684\u884c，\u4f46\u5728 RR \u4e0b\u8fd9\u4e9b\u9501\u8981\u5230\u4e8b\u52a1\u63d0\u4ea4\u624d\u91ca\u653e，\u7ed3\u679c\u5c31\u662f\u9501\u4f4f\u5168\u8868\u6240\u6709\u884c\u3002\u6240\u4ee5"\u5927\u8868 UPDATE \u4e00\u5b9a\u8981\u770b\u6267\u884c\u8ba1\u5212\u8d70\u6ca1\u8d70\u7d22\u5f15"\u662f\u94c1\u5f8b\u3002<\/p>\n

        \n

        \u516d\u3001\u5b9e\u6218 5：\u7ecf\u5178\u4ea4\u53c9\u6b7b\u9501<\/h3>\n

        \u7ed3\u8bba：\u4e24\u4e2a\u4e8b\u52a1\u4ee5\u76f8\u53cd\u987a\u5e8f\u9501\u540c\u4e00\u6279\u884c，InnoDB \u81ea\u52a8\u68c0\u6d4b\u5230\u6b7b\u9501，\u56de\u6eda undo \u91cf\u5c0f\u7684\u90a3\u4e2a\u3002<\/p>\n

        \u7528\u8868 t2(id PK, val)，\u6570\u636e (1,1),(2,2)：<\/p>\n\n\u6b65\u9aa4\u4f1a\u8bdd A\u4f1a\u8bdd B<\/tr>\n\n\n\n\n\n
        1<\/td>\nBEGIN; UPDATE t2 SET val=1 WHERE id=1;<\/td>\n<\/td>\n<\/tr>\n
        2<\/td>\n<\/td>\nBEGIN; UPDATE t2 SET val=2 WHERE id=2;<\/td>\n<\/tr>\n
        3<\/td>\nUPDATE t2 SET val=1 WHERE id=2;（\u7b49 B \u7684 id=2）<\/td>\n<\/td>\n<\/tr>\n
        4<\/td>\n<\/td>\nUPDATE t2 SET val=2 WHERE id=1;（\u7b49 A \u7684 id=1）\u2192 \u6b7b\u9501<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        \u771f\u5b9e\u8f93\u51fa：<\/p>\n

        [A] BEGIN
        \n[A] UPDATE t2 SET val=1 WHERE id=1 -> OK
        \n[B] BEGIN
        \n[B] UPDATE t2 SET val=2 WHERE id=2 -> OK
        \n[A] UPDATE t2 SET val=1 WHERE id=2; （\u5f00\u59cb\u7b49 B \u7684 id=2 \u9501）
        \n[B] UPDATE t2 SET val=2 WHERE id=1
        \n !! ERROR: (1213, 'Deadlock found when trying to get lock; try restarting transaction')
        \n[A] UPDATE id=2 -> \u6210\u529f <– A \u7b49\u5230\u4e86，\u7ee7\u7eed\u8d70<\/p>\n

        🔴 \u5173\u952e：B \u7acb\u523b\u6536\u5230 1213 \u6b7b\u9501\u9519\u8bef\u5e76\u88ab\u56de\u6eda，A \u4e0d\u53d7\u5f71\u54cd\u3002\u8fd9\u5c31\u662f InnoDB \u7684\u6b7b\u9501\u68c0\u6d4b\u2014\u2014\u5b83\u5728\u7b49\u5f85\u56fe\u91cc\u53d1\u73b0\u4e86\u73af，\u4e3b\u52a8\u9009\u4e00\u4e2a\u4ee3\u4ef7\u5c0f\u7684\u4e8b\u52a1\u56de\u6eda\u6765\u6253\u7834\u73af\u3002<\/p>\n

        6.1 \u8bfb\u61c2\u6b7b\u9501\u62a5\u544a<\/h4>\n

        SHOW ENGINE INNODB STATUS\\\\G \u91cc LATEST DETECTED DEADLOCK \u6bb5（\u771f\u5b9e\u8f93\u51fa，\u5df2\u7cbe\u7b80 hex \u90e8\u5206）：<\/p>\n

        LATEST DETECTED DEADLOCK
        \n————————
        \n*** (1) TRANSACTION:
        \nTRANSACTION 2817, ACTIVE 1 sec starting index read
        \nUPDATE t2 SET val=1 WHERE id=2 <– \u4e8b\u52a11\u6b63\u5728\u6267\u884c\u7684SQL<\/p>\n

        *** (1) HOLDS THE LOCK(S):
        \nRECORD LOCKS … index PRIMARY of table `demo16`.`t2`
        \n trx id 2817 lock_mode X locks rec but not gap
        \n Record lock … 0: len 4; hex 80000001; asc ;; <– \u6301\u6709 id=1 \u7684\u9501<\/p>\n

        *** (1) WAITING FOR THIS LOCK TO BE GRANTED:
        \nRECORD LOCKS … trx id 2817 lock_mode X locks rec but not gap waiting
        \n Record lock … 0: len 4; hex 80000002; asc ;; <– \u6b63\u5728\u7b49 id=2 \u7684\u9501<\/p>\n

        *** (2) TRANSACTION:
        \nTRANSACTION 2818, ACTIVE 1 sec starting index read
        \nUPDATE t2 SET val=2 WHERE id=1 <– \u4e8b\u52a12\u6b63\u5728\u6267\u884c\u7684SQL<\/p>\n

        *** (2) HOLDS THE LOCK(S):
        \nRECORD LOCKS … trx id 2818 lock_mode X locks rec but not gap
        \n Record lock … 0: len 4; hex 80000002; asc ;; <– \u6301\u6709 id=2 \u7684\u9501<\/p>\n

        *** (2) WAITING FOR THIS LOCK TO BE GRANTED:
        \nRECORD LOCKS … trx id 2818 lock_mode X locks rec but not gap waiting
        \n Record lock … 0: len 4; hex 80000001; asc ;; <– \u6b63\u5728\u7b49 id=1 \u7684\u9501<\/p>\n

        *** WE ROLL BACK TRANSACTION (2) <– 🔴 \u56de\u6eda\u4e8b\u52a12（\u4ee3\u4ef7\u5c0f\u7684）<\/p>\n

        \u9010\u884c\u89e3\u8bfb：<\/p>\n

          \n
        • 80000001 \/ 80000002 \u662f\u5927\u7aef\u7f16\u7801\u540e\u7684 id \u503c（MySQL \u7528\u5927\u7aef\u5e8f\u5b58\u6574\u578b，\u65b9\u4fbf\u6bd4\u8f83），\u5373 id=1 \u548c id=2\u3002<\/li>\n
        • \u4e8b\u52a1 1 \u6301\u6709 id=1\u3001\u7b49 id=2；\u4e8b\u52a1 2 \u6301\u6709 id=2\u3001\u7b49 id=1\u2014\u2014\u4e00\u4e2a\u5b8c\u7f8e\u7684\u7b49\u5f85\u73af\u3002<\/li>\n
        • WE ROLL BACK TRANSACTION (2)：InnoDB \u6311 undo \u91cf\u5c0f\u7684\u4e8b\u52a1 2 \u56de\u6eda，\u8ba9\u4e8b\u52a1 1 \u7ee7\u7eed\u3002<\/li>\n<\/ul>\n
          \n

          \u4e03\u3001\u5b9e\u6218 6：\u95f4\u9699\u9501 + \u63d2\u5165\u610f\u5411\u9501\u6b7b\u9501<\/h3>\n

          \u8fd9\u662f RR \u4e0b\u6700\u9690\u853d\u7684\u6b7b\u9501，\u4e5f\u662f"\u4e24\u4e2a\u4e8b\u52a1\u90fd\u6ca1\u6539\u540c\u4e00\u884c，\u5374\u6b7b\u9501\u4e86"\u7684\u5143\u51f6\u3002<\/p>\n\n\u6b65\u9aa4\u4f1a\u8bdd A\u4f1a\u8bdd B<\/tr>\n\n\n\n\n\n
          1<\/td>\nBEGIN; SELECT * FROM t WHERE id=25 FOR UPDATE;（\u9501\u95f4\u9699(20,30)）<\/td>\n<\/td>\n<\/tr>\n
          2<\/td>\n<\/td>\nBEGIN; SELECT * FROM t WHERE id=25 FOR UPDATE;（\u4e5f\u9501\u95f4\u9699，\u6210\u529f）<\/td>\n<\/tr>\n
          3<\/td>\nINSERT (25,…);（\u7b49 B \u7684\u95f4\u9699\u9501）<\/td>\n<\/td>\n<\/tr>\n
          4<\/td>\n<\/td>\nINSERT (26,…);（\u7b49 A \u7684\u95f4\u9699\u9501）\u2192 \u6b7b\u9501<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u771f\u5b9e\u8f93\u51fa：<\/p>\n

          [A] BEGIN
          \n[A] SELECT * FROM t WHERE id=25 FOR UPDATE -> \u7a7a（\u95f4\u9699\u9501，\u6210\u529f）
          \n[B] BEGIN
          \n[B] SELECT * FROM t WHERE id=25 FOR UPDATE -> \u7a7a（\u95f4\u9699\u9501\u4e0d\u4e92\u65a5，\u6210\u529f）
          \n[A] INSERT (25,25,25); （\u5f00\u59cb\u7b49 B \u7684\u95f4\u9699\u9501）
          \n[B] INSERT (26,26,26)
          \n !! ERROR: (1213, 'Deadlock found …')
          \n[A] INSERT (25,25,25) -> \u6210\u529f<\/p>\n

          \u6b7b\u9501\u62a5\u544a\u5173\u952e\u6bb5：<\/p>\n

          *** (1) TRANSACTION:
          \nTRANSACTION 2826 … UPDATE
          \nINSERT INTO t (id,idx_key,val) VALUES (25,25,25)
          \n*** (1) HOLDS THE LOCK(S):
          \nRECORD LOCKS … trx id 2826 lock_mode X locks gap before rec <– A \u6301\u6709 (20,30) \u95f4\u9699\u9501
          \n*** (1) WAITING FOR THIS LOCK TO BE GRANTED:
          \nRECORD LOCKS … lock_mode X locks gap before rec insert intention waiting <– A \u60f3\u63d2\u5165，\u7b49B<\/p>\n

          *** (2) TRANSACTION:
          \nTRANSACTION 2827 … UPDATE
          \nINSERT INTO t (id,idx_key,val) VALUES (26,26,26)
          \n*** (2) HOLDS THE LOCK(S):
          \nRECORD LOCKS … trx id 2827 lock_mode X locks gap before rec <– B \u4e5f\u6301\u6709 (20,30) \u95f4\u9699\u9501
          \n*** (2) WAITING FOR THIS LOCK TO BE GRANTED:
          \nRECORD LOCKS … lock_mode X locks gap before rec insert intention waiting <– B \u60f3\u63d2\u5165，\u7b49A<\/p>\n

          🔴 \u4e3a\u4ec0\u4e48\u4f1a\u6b7b\u9501？ \u95f4\u9699\u9501\u4e4b\u95f4\u4e0d\u4e92\u65a5，\u6240\u4ee5 A \u548c B \u80fd\u540c\u65f6\u9501\u4f4f\u540c\u4e00\u4e2a\u95f4\u9699 (20,30)\u3002\u4f46 INSERT \u8981\u5f80\u95f4\u9699\u91cc\u585e\u6570\u636e，\u5fc5\u987b\u62ff\u5230"\u63d2\u5165\u610f\u5411\u9501"，\u800c\u63d2\u5165\u610f\u5411\u9501\u548c\u522b\u4eba\u6301\u6709\u7684\u95f4\u9699\u9501\u4e92\u65a5\u3002\u4e8e\u662f：A \u62ff\u7740\u95f4\u9699\u9501\u7b49 B \u7684\u95f4\u9699\u9501\u653e\u884c\u63d2\u5165，B \u62ff\u7740\u95f4\u9699\u9501\u7b49 A \u7684\u95f4\u9699\u9501\u653e\u884c\u63d2\u5165\u2014\u2014\u73af\u5f62\u6210，\u6b7b\u9501\u3002<\/p>\n

          \u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48\u5f88\u591a\u751f\u4ea7\u4e8b\u6545\u91cc"\u660e\u660e\u4e24\u4e2a\u4e8b\u52a1\u64cd\u4f5c\u7684\u662f\u4e0d\u540c\u4e3b\u952e，\u5374\u62a5\u6b7b\u9501"\u2014\u2014\u5b83\u4eec\u649e\u5728\u540c\u4e00\u4e2a\u95f4\u9699\u4e0a\u4e86\u3002<\/p>\n

          \n

          \u516b\u3001\u6392\u67e5 SOP（\u8d34\u5899\u4e0a）<\/h3>\n

          \u7ebf\u4e0a\u53d1\u73b0"Update \u5361\u4f4f"\u6216"\u5076\u53d1 1213 \u6b7b\u9501"，\u6309\u8fd9\u4e2a\u987a\u5e8f\u67e5：<\/p>\n

          — 1. \u73b0\u5728\u6709\u54ea\u4e9b\u4e8b\u52a1\u5728\u8dd1？\u8c01\u5728\u7b49\u9501？<\/span>
          \nSELECT<\/span> trx_id,<\/span> trx_state,<\/span> trx_started,<\/span> trx_query
          \nFROM<\/span> information_schema.<\/span>innodb_trx\\\\G<\/p>\n

          — 2. \u73b0\u5728\u5230\u5e95\u52a0\u4e86\u54ea\u4e9b\u9501？<\/span>
          \nSELECT<\/span> ENGINE_TRANSACTION_ID,<\/span> LOCK_TYPE,<\/span> LOCK_MODE,<\/span> LOCK_DATA
          \nFROM<\/span> performance_schema.<\/span>data_locks\\\\G<\/p>\n

          — 3. \u8c01\u5728\u7b49\u8c01\u7684\u9501？<\/span>
          \nSELECT<\/span> *<\/span> FROM<\/span> performance_schema.<\/span>data_lock_waits\\\\G<\/p>\n

          — 4. \u54ea\u4e2a\u4f1a\u8bdd\u5728\u7b49\u9501？State=Locked \u7684\u5c31\u662f<\/span>
          \nSHOW<\/span> PROCESSLIST;<\/span><\/p>\n

          — 5. \u5b9e\u5728\u6551\u4e0d\u56de\u6765，\u6740\u4f1a\u8bdd（\u8c28\u614e）<\/span>
          \nKILL<\/span> <<\/span>processlist_id><\/span>;<\/span><\/p>\n

          — 6. \u770b\u6700\u8fd1\u4e00\u6b21\u6b7b\u9501\u957f\u4ec0\u4e48\u6837<\/span>
          \nSHOW<\/span> ENGINE<\/span> INNODB<\/span> STATUS<\/span>\\\\G — \u627e LATEST DETECTED DEADLOCK \u6bb5<\/span><\/p>\n

          — 7. \u628a\u6240\u6709\u6b7b\u9501\u90fd\u8bb0\u5230 error log（\u751f\u4ea7\u5efa\u8bae\u5f00）<\/span>
          \nSET<\/span> GLOBAL<\/span> innodb_print_all_deadlocks=<\/span>ON<\/span>;<\/span><\/p>\n

          \u6392\u67e5\u987a\u5e8f\u53e3\u8bc0：PROCESSLIST \u627e\u8c01\u5361 \u2192 innodb_trx \u770b\u957f\u4e8b\u52a1 \u2192 data_locks \u770b\u52a0\u4e86\u4ec0\u4e48\u9501 \u2192 data_lock_waits \u987a\u7740\u7b49\u5f85\u94fe\u627e\u5230\u6e90\u5934 \u2192 \u6e90\u5934 SQL \u770b explain \u6709\u6ca1\u6709\u8d70\u7d22\u5f15\u3002<\/p>\n

          \n

          \u4e5d\u3001\u9501\u7b49\u5f85 vs \u6b7b\u9501（\u522b\u518d\u641e\u6df7）<\/h3>\n\n\u5bf9\u6bd4\u9879\u9501\u7b49\u5f85\u6b7b\u9501<\/tr>\n\n\n\n\n\n
          \u672c\u8d28<\/td>\n\u4e00\u4e2a\u4e8b\u52a1\u7b49\u53e6\u4e00\u4e2a\u4e8b\u52a1\u91ca\u653e\u9501<\/td>\n\u4e24\u4e2a\u4e8b\u52a1\u4e92\u76f8\u7b49，\u5f62\u6210\u73af<\/td>\n<\/tr>\n
          MySQL \u53cd\u5e94<\/td>\n\u4e00\u76f4\u7b49，\u76f4\u5230 innodb_lock_wait_timeout（\u9ed8\u8ba4 50s）\u8d85\u65f6\u62a5 1205<\/td>\n\u7acb\u523b\u68c0\u6d4b\u5230\u73af，\u4e3b\u52a8\u56de\u6eda\u4e00\u4e2a\u4e8b\u52a1\u62a5 1213<\/td>\n<\/tr>\n
          \u9519\u8bef\u7801<\/td>\n1205 Lock wait timeout exceeded<\/td>\n1213 Deadlock found when trying to get lock<\/td>\n<\/tr>\n
          \u4ee3\u7801\u8981\u505a\u4ec0\u4e48<\/td>\n\u91cd\u8bd5，\u6216\u4f18\u5316\u7d22\u5f15\u51cf\u5c11\u9501\u8303\u56f4<\/td>\n\u6355\u83b7 1213，\u91cd\u8bd5\u6574\u4e2a\u4e8b\u52a1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          🔴 \u5de5\u7a0b\u4e0a\u7684\u786c\u89c4\u77e9：\u4ee3\u7801\u91cc\u6355\u83b7\u5230 1213 \u6216 1205 \u5fc5\u987b\u91cd\u8bd5\u4e8b\u52a1，\u4e0d\u80fd\u8ba9\u7528\u6237\u770b\u5230"\u7cfb\u7edf\u5fd9"\u3002\u91cd\u8bd5\u51e0\u6b21\u8fd8\u5931\u8d25，\u518d\u53bb\u67e5\u6162 SQL \u548c\u7d22\u5f15\u3002<\/p>\n

          \n

          \u603b\u7ed3：\u4f60\u771f\u6b63\u9700\u8981\u8bb0\u4f4f\u7684 7 \u4ef6\u4e8b<\/h3>\n
        • \u770b\u9501\u7528 performance_schema.data_locks，LOCK_MODE \u56db\u79cd\u503c：X（Next-Key）\u3001X,REC_NOT_GAP（\u8bb0\u5f55\u9501）\u3001X,GAP（\u95f4\u9699\u9501）\u3001X,GAP,INSERT_INTENTION（\u63d2\u5165\u610f\u5411\u9501\u7b49\u5f85）\u3002<\/li>\n
        • \u552f\u4e00\u7d22\u5f15\u7b49\u503c\u547d\u4e2d \u2192 REC_NOT_GAP \u53ea\u9501\u90a3\u884c；\u7b49\u503c\u672a\u547d\u4e2d \u2192 GAP \u9501\u95f4\u9699；\u8303\u56f4\u67e5\u8be2 \u2192 Next-Key Lock \u9501\u4f4f\u5de6\u5f00\u53f3\u95ed\u533a\u95f4\u3002<\/li>\n
        • WHERE \u6ca1\u7d22\u5f15 = \u5168\u8868\u626b\u63cf\u52a0\u5168\u8868\u884c\u9501，data_locks \u91cc\u80fd\u770b\u5230\u6bcf\u4e00\u6761\u4e3b\u952e\u8bb0\u5f55\u90fd\u88ab X \u9501；\u5927\u8868\u4e0a\u8fd9\u662f\u4e8b\u6545，UPDATE \u524d\u5fc5\u987b\u770b explain\u3002<\/li>\n
        • \u95f4\u9699\u9501\u4e4b\u95f4\u4e0d\u4e92\u65a5，\u4f46\u548c\u63d2\u5165\u610f\u5411\u9501\u4e92\u65a5\u2014\u2014\u8fd9\u662f"\u4e24\u4e2a\u4e8b\u52a1\u6ca1\u6539\u540c\u4e00\u884c\u5374\u6b7b\u9501"\u7684\u6839\u56e0\u3002<\/li>\n
        • \u6b7b\u9501\u662f InnoDB \u4e3b\u52a8\u68c0\u6d4b\u3001\u4e3b\u52a8\u56de\u6eda undo \u5c0f\u7684\u4e8b\u52a1，\u9519\u8bef\u7801 1213；\u9501\u7b49\u5f85\u662f\u7b49\u8d85\u65f6\u624d\u62a5\u9519，\u9519\u8bef\u7801 1205\u3002<\/li>\n
        • \u6b7b\u9501\u62a5\u544a\u770b LATEST DETECTED DEADLOCK：\u8c01 holds \u4ec0\u4e48\u3001waiting \u4ec0\u4e48\u3001WE ROLL BACK TRANSACTION (n) \u56de\u6eda\u4e86\u8c01\u3002<\/li>\n
        • \u4ee3\u7801\u5fc5\u987b\u5bf9 1213\/1205 \u505a\u4e8b\u52a1\u91cd\u8bd5；\u6392\u67e5\u6309 PROCESSLIST \u2192 innodb_trx \u2192 data_locks \u2192 data_lock_waits \u987a\u5e8f\u3002<\/li>\n

          \u9a8c\u8bc1\u6e05\u5355<\/h3>\n
            \n
          • \u80fd\u590d\u73b0\u8bb0\u5f55\u9501：WHERE id=20 FOR UPDATE \u540e data_locks \u51fa\u73b0 X,REC_NOT_GAP | 20，\u6539 id=10 \u6210\u529f\u3001\u6539 id=20 \u963b\u585e<\/li>\n
          • \u80fd\u590d\u73b0\u95f4\u9699\u9501：WHERE id=25 FOR UPDATE \u540e\u51fa\u73b0 X,GAP | 30，\u63d2 25 \u963b\u585e\u3001\u63d2 35 \u6210\u529f<\/li>\n
          • \u80fd\u590d\u73b0 Next-Key：\u8303\u56f4\u67e5\u8be2\u540e data_locks \u51fa\u73b0 X | 30 \u548c X,GAP | 40，\u63d2 25\/35 \u90fd\u963b\u585e<\/li>\n
          • \u80fd\u590d\u73b0\u65e0\u7d22\u5f15\u9501\u5168\u8868：data_locks \u91cc 10\/20\/30\/40 \u5168\u88ab X \u9501；\u52a0\u7d22\u5f15\u540e\u8303\u56f4\u660e\u663e\u7f29\u5c0f<\/li>\n
          • \u80fd\u590d\u73b0\u4ea4\u53c9\u6b7b\u9501，\u4ece SHOW ENGINE INNODB STATUS \u91cc\u6307\u51fa\u8c01 holds id=1 \u7b49 id=2\u3001\u8c01 holds id=2 \u7b49 id=1<\/li>\n
          • \u80fd\u89e3\u91ca\u95f4\u9699\u9501+\u63d2\u5165\u4e3a\u4ec0\u4e48\u4f1a\u6b7b\u9501（\u95f4\u9699\u9501\u4e0d\u4e92\u65a5\u3001\u63d2\u5165\u610f\u5411\u9501\u4e92\u65a5）<\/li>\n
          • \u80fd\u533a\u5206 1205 \u9501\u7b49\u5f85\u8d85\u65f6\u548c 1213 \u6b7b\u9501，\u5e76\u8bf4\u51fa\u4ee3\u7801\u8be5\u600e\u4e48\u5904\u7406<\/li>\n<\/ul>\n

            \u53c2\u8003\u8d44\u6e90<\/h3>\n
              \n
            • MySQL 8.0 \u5b98\u65b9\u6587\u6863：InnoDB \u9501\u6a21\u5f0f https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-lock-modes.html<\/li>\n
            • MySQL 8.0：InnoDB \u6b7b\u9501\u68c0\u6d4b https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-deadlock-detection.html<\/li>\n
            • MySQL 8.0：performance_schema.data_locks https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/performance-schema-data-locks-table.html<\/li>\n
            • MySQL 8.0：performance_schema.data_lock_waits https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/performance-schema-data-lock-waits-table.html<\/li>\n
            • MySQL 8.0：innodb_print_all_deadlocks https:\/\/dev.mysql.com\/doc\/refman\/8.0\/en\/innodb-parameters.html#sysvar_innodb_print_all_deadlocks<\/li>\n<\/ul>\n
              \n

              \u4e0b\u4e00\u7bc7\u300a\u4e09\u5927\u65e5\u5fd7：undo\/redo\/binlog\u300b：\u9501\u8bb2\u5b8c\u4e86，\u79bb\u5f00"\u5e76\u53d1"\u8fdb\u5165"\u53ef\u9760\u6027"\u2014\u2014undo log \u600e\u4e48\u652f\u6491\u56de\u6eda\u548c MVCC \u7248\u672c\u94fe\u3001redo log \u600e\u4e48\u9760 WAL \u4fdd\u8bc1 crash \u4e0d\u4e22\u6570\u636e\u3001binlog \u4e09\u79cd\u683c\u5f0f\u6709\u5565\u533a\u522b\u3001\u4ee5\u53ca\u90a3\u6761\u7ecf\u5178\u7684"\u4e24\u9636\u6bb5\u63d0\u4ea4"\u4e3a\u4ec0\u4e48\u5fc5\u987b\u5b58\u5728\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

              \u3010\u8ba1\u7b97\u57fa\u7840｜MySQL16\u3011\u3010\u5de5\u7a0b\u5b9e\u6218\u3011\u884c\u9501\/\u95f4\u9699\u9501\/\u6b7b\u9501\u590d\u73b0\u6392\u67e5
              \n\u4e0a\u4e00\u7bc7\u628a\u4e8b\u52a1\u9694\u79bb\u548c MVCC \u7528\u5b9e\u9a8c\u8dd1\u901a\u4e86\u3002\u8fd9\u4e00\u7bc7\u662f\u5b83\u7684\\”\u9501\u7bc7\u5b9e\u6218\\”\u2014\u2014\u7ebf\u4e0a\u6700\u5e38\u89c1\u7684\u4e24\u7c7b\u4e8b\u6545：\u4e00\u6761 UPDATE \u628a\u6574\u4e2a\u5e93\u5199\u963b\u585e\u4e86，\u4ee5\u53ca\u62a5\u9519 ERROR 1213 (40001): Deadlock found when trying to get lock\u3002\u524d\u8005\u5341\u6709\u516b\u4e5d\u662f\\”WHERE \u6ca1\u8d70\u7d22\u5f15，\u884c\u9501\u9000\u5316\u6210\u8868\u9501\\”，\u540e\u8005\u662f\u4e24\u4e2a\u4e8b\u52a1\u52a0\u9501\u987a\u5e8f\u4ea4\u53c9<\/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":[11820,116,84],"topic":[],"class_list":["post-118327","post","type-post","status-publish","format-standard","hentry","category-server","tag-atomgit","tag-adb","tag-android"],"yoast_head":"\n\u3010\u8ba1\u7b97\u57fa\u7840\uff5cMySQL16\u3011\u3010\u5de5\u7a0b\u5b9e\u6218\u3011\u884c\u9501\/\u95f4\u9699\u9501\/\u6b7b\u9501\u590d\u73b0\u6392\u67e5 - 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