{"id":951,"date":"2012-08-13T00:53:55","date_gmt":"2012-08-12T15:53:55","guid":{"rendered":"http:\/\/a23187.yorozuyah.com\/blog\/?p=951"},"modified":"2012-08-13T02:10:37","modified_gmt":"2012-08-12T17:10:37","slug":"mysql%e3%81%aeinnodb%e3%81%a7lock%e5%be%85%e3%81%a1%e3%81%aesql%e3%82%92%e8%aa%bf%e3%81%b9%e3%82%8b","status":"publish","type":"post","link":"https:\/\/a23187.yorozuyah.com\/blog\/?p=951","title":{"rendered":"MySQL\u306eInnoDB\u3067Lock\u5f85\u3061\u306eSQL\u3092\u8abf\u3079\u308b"},"content":{"rendered":"

\u30ed\u30f3\u30c9\u30f3\u30aa\u30ea\u30f3\u30d4\u30c3\u30af\u3082\u3044\u3088\u3044\u3088\u9589\u4f1a\u5f0f\u304c\u8fd1\u3065\u3044\u3066\u6765\u3066\u3066\u3001\u5bdd\u4e0d\u8db3\u3060\u3063\u305f\u65e5\u3005\u304c\u7d42\u308f\u308b\u3068\u601d\u3046\u3068\u3001\u306a\u3093\u3060\u304b\u5bc2\u3057\u3044\u6c17\u6301\u3061\u3067\u3002<\/p>\n

\u7537\u5b50\u30b5\u30c3\u30ab\u30fc\u306f\u30c8\u30a5\u30fc\u30ed\u30f3\u56fd\u969b\u5927\u4f1a\u306e\u9803\u306f\u3069\u3046\u306a\u308b\u3053\u3068\u304b\u3068\u601d\u3044\u307e\u3057\u305f\u304c\u3001\u30aa\u30ea\u30f3\u30d4\u30c3\u30af\u3067\u306f\u3059\u3070\u3089\u3057\u3044\u8a66\u5408\u306e\u9023\u7d9a\u3067\u3001\u826f\u304b\u3063\u305f\u3067\u3059\u3002\u7279\u306b\u30a8\u30b8\u30d7\u30c8\u6226\u306e\u6e05\u6b66\u306e\u30c1\u30a7\u30a4\u30b9\u304b\u3089\u306e\u6c38\u4e95\u306e\u30b4\u30fc\u30eb\u306f\u6700\u9ad8\u3067\u3057\u305f\u3002<\/p>\n

\u307e\u3042\u3001\u6700\u5f8c\u306e\u8a66\u5408\u306f\u52dd\u3063\u3066\u307b\u3057\u304b\u3063\u305f\u3067\u3059\u304c\u30fb\u30fb\u30fb\u3002<\/p>\n

\u3055\u3066\u3001MySQL\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306e\u8a71\u3067\u3059\u304c\u3001\u3088\u304f\u3042\u308b\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3068\u3044\u3048\u3070\u3001innodb_buffer_pool\u306a\u3069\u306e\u30e1\u30e2\u30ea\u5468\u308a\u306e\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u3001\u30b9\u30ed\u30fc\u30af\u30a8\u30ea\u3092\u5229\u7528\u3057\u305f\u30af\u30a8\u30ea\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\u306a\u3069\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u57fa\u672c\u7684\u306b\u306f\u3069\u3061\u3089\u304b\u304c\u4e07\u5168\u3067\u3042\u308c\u3070\u307b\u307c\u554f\u984c\u306f\u7121\u3044\u304b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u305d\u3093\u306a\u306b\u96e3\u3057\u3044\u30af\u30a8\u30ea\u3067\u3082\u306a\u304f\u3001explain\u3067\u3082\u5358\u767a\u3067\u3082\u5b9f\u884c\u6642\u9593\u306b\u554f\u984c\u306f\u306a\u3044\u30af\u30a8\u30ea\u3067\u6027\u80fd\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u30ed\u30c3\u30af\u5f85\u3061\u3092\u8a98\u767a\u3059\u308b\u3088\u3046\u306a\u30af\u30a8\u30ea\u3067\u3059\u3002<\/p>\n

InnoDB\u306e\u30c6\u30fc\u30d6\u30eb\u306e\u5834\u5408\u306f\u66f4\u65b0\u7cfb\u306e\u30af\u30a8\u30ea\u3067\u3082\u57fa\u672c\u306f\u884c\u30ed\u30c3\u30af\u306a\u306e\u3067\u7c92\u5ea6\u306f\u4f4e\u3044\u3082\u306e\u306e\u3001\u8907\u6570\u884c\u306eUPDATE\u306a\u3069\u3067\u306f\u5f85\u305f\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

\u306a\u306e\u3067\u3001information_schema\u3092\u4f7f\u3063\u305f\u5f85\u3061\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u30af\u30a8\u30ea\u306e\u8abf\u67fb\u65b9\u6cd5\u3092\u7c21\u5358\u306b\u8a66\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u4f7f\u3046\u30c6\u30fc\u30d6\u30eb\u306f\u3053\u3061\u3089\u306b\u306a\u308a\u307e\u3059\u3002
\ninformation_schema.innodb_lock_waits\u3000\uff1a\u3000\u30ed\u30c3\u30af\u5f85\u3061\u60c5\u5831
\ninformation_schema.innodb_trx\u3000\uff1a\u3000\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u60c5\u5831<\/p>\n

\u30c6\u30fc\u30d6\u30eb\u306fCity\u30c6\u30fc\u30d6\u30eb\u3092InnoDB\u3067\u4f5c\u3063\u3066\u307e\u3059\u3002<\/p>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f31\u304b\u3089\u30b9\u30bf\u30fc\u30c8
\nmysql> set autocommit = 0;
\nQuery OK, 0 rows affected (0.00 sec)<\/p>\n

mysql> select * from City where id = 1;
\n+—-+——-+————-+———-+————+
\n| ID | Name | CountryCode | District | Population |
\n+—-+——-+————-+———-+————+
\n| 1 | Kabul | AFG | Kabol | 1780000 |
\n+—-+——-+————-+———-+————+
\n1 row in set (0.00 sec)<\/p>\n

mysql> update City set Population = Population + 1 where id = 1;
\nQuery OK, 1 row affected (0.00 sec)
\nRows matched: 1 Changed: 1 Warnings: 0<\/p>\n

mysql> select * from City where id = 1;
\n+—-+——-+————-+———-+————+
\n| ID | Name | CountryCode | District | Population |
\n+—-+——-+————-+———-+————+
\n| 1 | Kabul | AFG | Kabol | 1780001 |
\n+—-+——-+————-+———-+————+
\n1 row in set (0.00 sec)<\/p>\n

commit\u306f\u3057\u306a\u3044\u3067\u3001<\/p>\n<\/div>\n

\u6b21\u306b\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32\u3067\u30ed\u30c3\u30af\u3092\u767a\u751f\u3055\u305b\u307e\u3059\u3002<\/p>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32\u3092\u30b9\u30bf\u30fc\u30c8mysql> set autocommit = 0;
\nQuery OK, 0 rows affected (0.00 sec)mysql> select * from City where id = 1;
\n+—-+——-+————-+———-+————+
\n| ID | Name | CountryCode | District | Population |
\n+—-+——-+————-+———-+————+
\n| 1 | Kabul | AFG | Kabol | 1780000 |
\n+—-+——-+————-+———-+————+
\n1 row in set (0.00 sec)<\/p>\n

mysql> update City set Population = Population + 10 where id = 1;<\/p>\n

\u3053\u3053\u3067\u30ed\u30c3\u30af\u5f85\u3061\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n

\u30ed\u30c3\u30af\u5f85\u3061\u306e\u9593\u306binformation_schema\u3092\u78ba\u8a8d\u3002<\/p>\n

\u307e\u305a\u306f\u3001innodb_trx\u304b\u3089mysql> select * from innodb_trx\\G
\n*************************** 1. row ***************************
\ntrx_id: 24B1EC
\ntrx_state: LOCK WAIT
\ntrx_started: 2012-08-13 00:13:40
\ntrx_requested_lock_id: 24B1EC:96:4:2
\ntrx_wait_started: 2012-08-13 00:16:04
\ntrx_weight: 2
\ntrx_mysql_thread_id: 20247
\ntrx_query: update City set Population = Population + 10 where id = 1
\ntrx_operation_state: starting index read
\ntrx_tables_in_use: 1
\ntrx_tables_locked: 1
\ntrx_lock_structs: 2
\ntrx_lock_memory_bytes: 1248
\ntrx_rows_locked: 1
\ntrx_rows_modified: 0
\ntrx_concurrency_tickets: 0
\ntrx_isolation_level: READ COMMITTED
\ntrx_unique_checks: 1
\ntrx_foreign_key_checks: 1
\ntrx_last_foreign_key_error: NULL
\ntrx_adaptive_hash_latched: 0
\ntrx_adaptive_hash_timeout: 10000
\n*************************** 2. row ***************************
\ntrx_id: 24B10F
\ntrx_state: RUNNING
\ntrx_started: 2012-08-13 00:10:44
\ntrx_requested_lock_id: NULL
\ntrx_wait_started: NULL
\ntrx_weight: 3
\ntrx_mysql_thread_id: 20353
\ntrx_query: NULL
\ntrx_operation_state: NULL
\ntrx_tables_in_use: 0
\ntrx_tables_locked: 0
\ntrx_lock_structs: 2
\ntrx_lock_memory_bytes: 376
\ntrx_rows_locked: 1
\ntrx_rows_modified: 1
\ntrx_concurrency_tickets: 0
\ntrx_isolation_level: READ COMMITTED
\ntrx_unique_checks: 1
\ntrx_foreign_key_checks: 1
\ntrx_last_foreign_key_error: NULL
\ntrx_adaptive_hash_latched: 0
\ntrx_adaptive_hash_timeout: 10000
\n2 rows in set (0.00 sec)2\u3064\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u5b9f\u884c\u4e2d\u3068\u3044\u3046\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n

\u3057\u304b\u3082\u3001trx_id: 24B1EC\u306e\u65b9\u306ftrx_state: LOCK WAIT\u3068\u3044\u3046\u3053\u3068\u3067\u30ed\u30c3\u30af\u5f85\u3061\u306e\u3088\u3046\u3067\u3059\u3002<\/p>\n

\u305d\u3057\u3066\u3001innodb_lock_waits\u306e\u65b9\u3092\u898b\u308b\u3068\u3001<\/p>\n

mysql> select * from innodb_lock_waits;
\n+——————-+——————-+—————–+——————+
\n| requesting_trx_id | requested_lock_id | blocking_trx_id | blocking_lock_id |
\n+——————-+——————-+—————–+——————+
\n| 24B1EC | 24B1EC:96:4:2 | 24B10F | 24B10F:96:4:2 |
\n+——————-+——————-+—————–+——————+
\n1 row in set (0.00 sec)<\/p>\n

24B1EC\u306f24B10F\u306b\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n

\u305d\u3046\u3053\u3046\u3057\u3066\u3044\u308b\u3068\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32\u306e\u65b9\u304c\u30ed\u30c3\u30af\u5f85\u3061\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32
\nmysql> update City set Population = Population + 10 where id = 1;
\nERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transaction\u3053\u3053\u3067innodb_lock_waits\u3092\u898b\u308b\u3068\u30fb\u30fb\u30fbmysql> select * from innodb_lock_waits;
\nEmpty set (0.01 sec)<\/p>\n

\u306a\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n

trx\u306f\uff1f<\/p>\n

mysql> select trx_id from innodb_trx;
\n+——–+
\n| trx_id |
\n+——–+
\n| 24B1EC |
\n| 24B10F |
\n+——–+
\n2 rows in set (0.00 sec)<\/p>\n

\u307e\u30602\u3064\u3042\u308a\u307e\u3059\u3002
\n\u30ed\u30c3\u30af\u304c\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u3057\u305f\u3060\u3051\u3067\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u7d42\u308f\u3063\u305f\u308f\u3051\u3067\u306f\u306a\u3044\u3067\u3059\u3002<\/p>\n<\/div>\n

\u3053\u3053\u3067\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f31\u3092\u30b3\u30df\u30c3\u30c8\u3057\u3066\u307f\u308b\u3068\uff1f<\/p>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f31
\nmysql> commit;
\nQuery OK, 0 rows affected (0.00 sec)<\/div>\n

\u30b9\u30c6\u30fc\u30bf\u30b9\u306f\uff1f<\/p>\n

\n

mysql> select trx_id from innodb_trx;
\n+——–+
\n| trx_id |
\n+——–+
\n| 24B1EC |
\n+——–+<\/p>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32\u3060\u3051\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32\u3082\u30b3\u30df\u30c3\u30c8\u3067<\/p>\n

\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f32
\nmysql> select * from City where id = 1;
\n+—-+——-+————-+———-+————+
\n| ID | Name | CountryCode | District | Population |
\n+—-+——-+————-+———-+————+
\n| 1 | Kabul | AFG | Kabol | 1780001 |\u2605\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f31\u304c\u30b3\u30df\u30c3\u30c8\u3055\u308c\u3066\u307e\u3059\u3002
\n+—-+——-+————-+———-+————+
\n1 row in set (0.00 sec)mysql> commit;
\nQuery OK, 0 rows affected (0.00 sec)<\/div>\n
mysql> select trx_id from innodb_trx;
\nEmpty set (0.01 sec)\u305d\u3057\u3066\u8ab0\u3082\u3044\u306a\u304f\u306a\u3063\u305f\u30fb\u30fb\u30fb<\/div>\n

\u6b8b\u5ff5\u306a\u304c\u3089\u3001\u3069\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3067\u5f85\u305f\u3055\u308c\u3066\u3044\u308b\u304b\u3060\u3051\u3057\u304b\u308f\u304b\u308a\u307e\u305b\u3093\u304c\u3001\u3069\u306e\u30af\u30a8\u30ea\u3067\u5f85\u3061\u304c\u767a\u751f\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u306f\u3001innodb_lock_waits\u3092\u691c\u7d22\u3057\u3066\u3044\u308c\u3070\u308f\u304b\u308a\u305d\u3046\u3067\u3059\u3002<\/p>\n

\u307e\u305f\u3001\u3053\u306e\u65b9\u6cd5\u3067\u306f\u5168\u3066\u306e\u30ed\u30c3\u30af\u3092\u7db2\u7f85\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u304c\u3001global status\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u3067\u3001\u884c\u30ed\u30c3\u30af\u306e\u56de\u6570\u3092\u8abf\u3079\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u3002<\/p>\n

mysql> select * from global_status where variable_name like “innodb%lock%”;
\n+——————————-+—————-+
\n| VARIABLE_NAME | VARIABLE_VALUE |
\n+——————————-+—————-+
\n| INNODB_ROW_LOCK_CURRENT_WAITS | 1 |\u2605\u73fe\u5728\u306e\u884c\u30ed\u30c3\u30af\u5f85\u3061\u306e\u30af\u30a8\u30ea\u6570
\n| INNODB_ROW_LOCK_TIME | 2525715 |\u2605\u30ed\u30c3\u30af\u5f85\u3061\u6642\u9593\u306e\u5408\u8a08\uff08\u30df\u30ea\u79d2\uff09
\n| INNODB_ROW_LOCK_TIME_AVG | 1151 |\u2605\u30ed\u30c3\u30af\u5f85\u3061\u6642\u9593\u306e\u5e73\u5747\uff08\u30df\u30ea\u79d2\uff09
\n| INNODB_ROW_LOCK_TIME_MAX | 121268 |\u2605\u30ed\u30c3\u30af\u5f85\u3061\u6642\u9593\u306e\u6700\u5927\uff08\u30df\u30ea\u79d2\uff09
\n| INNODB_ROW_LOCK_WAITS | 2193 |\u2605\u30ed\u30c3\u30af\u5f85\u3061\u306e\u30af\u30a8\u30ea\u7dcf\u6570
\n+——————————-+—————-+
\n5 rows in set (0.03 sec)<\/div>\n","protected":false},"excerpt":{"rendered":"

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