You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
InnoDBã«ã¯ãã¼ã¿ã®å§ç¸®æ©è½ãããã¾ãããããã©ã¼ãã³ã¹ãä½ããã¨ãããã¾ã使ããã¦ãã¾ããããã ä»å¹´ã® Percona Live 㧠Oracle MySQL, MariaDB, ãã㦠Percona Server ãæ°ãã InnoDB Compression ãåºãã¦ãã¾ãããããã¯Fusion-ioã® R&D ãã¼ã ããã©ãã·ã¥ã¹ãã¬ã¼ã¸åãã® MySQL é«éåã®ä¸ç°ã§éçºããããããå ã«ãªã£ã¦ãã¾ããã¡ãªã¿ã«ç§ã¯ Fusion-io ã®ç¤¾å¡ã§ãã®ã§ãã®çºè¡¨ãã¯ã¯ãã«ãã¦å¾ ã£ã¦ããã®ã§ãããæè§ã³ã¼ããä¸è¬ã«ãªãªã¼ã¹ãããã®ã§ãã½ã¼ã¹ã³ã¼ããçºãã¦åä½ã調ã¹ããã¨ã«ãã¾ããã åèã«ããã®ã¯ MySQL Server Snapshots (labs.mysql.com) ã«ããMySQL with InnoDB PageIO Compression ã®ã½ã¼ã¹ã³ã¼ããããã³M
ãã®è¨äºã¯MySQL Casual Advent Calendar 2013 3æ¥ç®ã®è¨äºã§ãã ã¯ãã㫠以åã«SELECT ... FOR UPDATEã¨ããã¯ã®æå - walf443's blogã®è¨äºã«Twitterã§å°ãè¨åãããã§ãããããã®è£è¶³ã¨ããããInnoDBã®ããã¯ã®ç¯å²ã«ã¤ãã¦åã¯ããç解ãã¦ãã¾ããã¨ãã話ã§ãã MySQLã¨ããã°ãInnoDBããããã¯ã¼ã¯ãµã¼ãã¨ãã¦ä½¿ãããã®ãã¬ã¼ã ã¯ã¼ã¯ã§ãããSQLã¯InnoDBã®ã¤ã³ããã¯ã¹ã«ã¢ã¯ã»ã¹ããããã®DSLã¨ãã£ã¦ãéè¨ã§ã¯ãªãã§ãããã InnoDBã®ããã¯ã¨ã¯ã¤ã¾ãã¨ããã¤ã³ããã¯ã¹è¡ã®ããã¯ãªã®ã§ãInnoDBã®ããã¯ã®ç¯å²ãç解ããããã«InnoDBã®ã¤ã³ããã¯ã¹ã«ã¤ãã¦å°ãåç½®ããã¦ããã¾ã(ã ãã¶ç«¯æã£ããã©é·ããªã£ãâ¦)ã ã¯ã©ã¹ã¿ã¤ã³ããã¯ã¹ã¨ã»ã«ã³ããªã¤ã³ããã¯ã¹ ãã§ã«InnoDBã®ã¤ã³
æ²é¡ã®MySQL5.6ã®æ°æ©è½ã§éãã§ã¿ãã¡ã¢ã InnoDBãããã¡ãã¼ã«ã®å 容ããã¡ã¤ã«ã«æ¸ãåºãã¦ãããã¨ãåºæ¥ãæ©è½ã追å ãããã æ¸ãåºãã¿ã¤ãã³ã°ã¯æ£å¸¸çµäºæ(SET GLOBALã¾ãã¯my.cnfã§innodb_buffer_pool_dump_at_shutdown = 1ãè¨å®)ã¾ã㯠任æã®ã¿ã¤ãã³ã°ã§å³ææ¸ãåºã(SET GLOBAL innodb_buffer_pool_dump_now = 1;) èªã¿åºãã¿ã¤ãã³ã°ã¯èµ·åæ(my.cnfã«innodb_buffer_pool_load_at_startup = 1)ã¾ã㯠任æã®ã¿ã¤ãã³ã°ã§å³æèªã¿è¾¼ã¿(SET GLOBAL innodb_buffer_pool_load_now = 1;) ããã§ãmysqldãåèµ·åãã¦ãããã¡ãã¼ã«ã空ã£ã½ã«ãªã£ã¦ã ç´ æ©ãã¦ã©ã¼ã ã¢ããã§ããããã¨ãããã¨ãããã ç¹ã«ä½
HeatWave Use automated and integrated generative AI and machine learning (ML) in one cloud service for transactions and lakehouse scale analytics. Get faster insights from all your data with unmatched performance and deploy apps in your choice of cloud providers. Learn More » MySQL Enterprise Edition The most comprehensive set of advanced features, management tools and technical support to achieve
ãªã¼ãã³ã½ã¼ã¹ãã¼ã¿ãã¼ã¹ãå éããããã ã©ãã¼ãã¼ãã®ããã°ã§ããã«ã¬ã¼æ¥è¨ãå ¼ãã¦ã¾ãããªãèè ã¯2010-06-01ããæ¥æ¬ãªã©ã¯ã«ã«å¨ç±ãã¦ãã¾ãããæ¬ãµã¤ãï¼ããã°ãã¾ãã¯ã¦ã§ããµã¤ãï¼ã«ããã¦ç¤ºããã¦ããè¦è§£ã¯ãç§èªèº«ã®è¦è§£ã§ãã£ã¦ããªã©ã¯ã«ã®è¦è§£ãå¿ ãããåæ ãããã®ã§ã¯ããã¾ããã MySQL 5.1+InnoDB Plugin, 5.5以éã§ãµãã¼ãããã以ä¸ã®ä¸ã¤ã®æ å ±ã¹ãã¼ããã¼ãã«ã使ãã¨ãã©ã³ã¶ã¯ã·ã§ã³ã¨ããã¯ã«é¢ããæ å ±ãInnoDBããã¯ã¢ãã¿ãããç°¡åã§ããããããåå¾ãããã¨ãå¯è½ã§ãã | INNODB_LOCK_WAITS |ç¬èª: ããã¯å¾ ã¡æ å ± | INNODB_LOCKS |ç¬èª: ããã¯ç«¶åæ å ± | INNODB_TRX |ç¬èª: ãã©ã³ã¶ã¯ã·ã§ã³æ å ± é常ä¸ã¤ã®æ¥ç¶ã§ã¯ãã©ã³ã¶ã¯ã·ã§ã³ã®BEGIN; COMMIT;ãä½åº¦ãè¡ãã¾ããã¤ã¾ãä¸ã¤
InnoDBã¯ã¯ã©ã¹ã¿ã¤ã³ããã¯ã¹ã¨ããæ§é ã«ãªã£ã¦ãããä»æ¥ã¯ã¯ã©ã¹ã¿ã¤ã³ããã¯ã¹ãã©ããããã¨ãã¨ãããã¨ããçããã«ç解ãã¦é ãããããã£ã¨ãç解ãã¦é ããããã¤ã³ãã¯ãã»ã«ã³ããªã¤ã³ããã¯ã¹ã®ãªã¼ããã¼ãã«ã¯ä¸»ãã¼ã®å¤ãå«ã¾ãã¦ãããã¨ãããã¨ã ã 主ãã¼ã®æ§é InnoDBã®ä¸»ãã¼ã¯æ¬¡ã®å³ã®ããã«ããã¼ã¿ã主ãã¼ã®ãªã¼ããã¼ãã«å«ã¾ãããã¨ããæ§é ã«ãªã£ã¦ããããã®ãããªæ§é ãã¯ã©ã¹ã¿ã¤ã³ããã¯ã¹ã¨ããã ãã®ãããªæ§é ã«ãªã£ã¦ãããã¨ã«ã¯å©ç¹ã¨æ¬ ç¹ããããã大ããªå©ç¹ã¯ä¸»ãã¼ã®å¤ã§æ¤ç´¢ãããã¨é常ã«é«éã ã¨ãããã¨ã ã主ãã¼ã®ãªã¼ããã¼ãã«ãã©ãçããã¨ãã«ã¯ãæ¢ã«ãã¼ã¿ã®ãã§ãããå®äºãã¦ããããã¼ã¿ã¨ã¤ã³ããã¯ã¹ãå¥ã ã«æ ¼ç´ããã¦ããã¿ã¤ãã®ã¹ãã¬ã¼ã¸ã¨ã³ã¸ã³ã§ã¯ãã¤ã³ããã¯ã¹ãããã¼ã¿ã®ä½ç½®ãèªã¿åã£ã¦ããã®å¾ãã¼ã¿ãã¡ã¤ã«ãããã¼ã¿ããã§ããããããã®ããã«äºæ®µéã®æä½ã
ã¯ã¦ãªã°ã«ã¼ãã®çµäºæ¥ã2020å¹´1æ31æ¥(é)ã«æ±ºå®ãã¾ãã 以ä¸ã®ã¨ã³ããªã®éããä»å¹´æ«ãç®å¦ã«ã¯ã¦ãªã°ã«ã¼ããçµäºäºå®ã§ããæ¨ããç¥ãããã¦ããã¾ããã 2019å¹´æ«ãç®å¦ã«ãã¯ã¦ãªã°ã«ã¼ãã®æä¾ãçµäºããäºå®ã§ã - ã¯ã¦ãªã°ã«ã¼ãæ¥è¨ ãã®ãã³ãæ£å¼ã«çµäºæ¥ã決å®ãããã¾ããã®ã§ã以ä¸ã®éãã確èªãã ããã çµäºæ¥: 2020å¹´1æ31æ¥(é) ã¨ã¯ã¹ãã¼ãå¸æç³è«æé:2020å¹´1æ31æ¥(é) çµäºæ¥ä»¥éã¯ãã¯ã¦ãªã°ã«ã¼ãã®é²è¦§ããã³æ稿ã¯è¡ãã¾ãããæ¥è¨ã®ã¨ã¯ã¹ãã¼ããå¿ è¦ãªæ¹ã¯ä»¥ä¸ã®è¨äºã«ãããã£ã¦æç¶ãããã¦ãã ããã ã¯ã¦ãªã°ã«ã¼ãã«æ稿ãããæ¥è¨ãã¼ã¿ã®ã¨ã¯ã¹ãã¼ãã«ã¤ã㦠- ã¯ã¦ãªã°ã«ã¼ãæ¥è¨ ãå©ç¨ã®ã¿ãªãã¾ã«ã¯ãè¿·æãããããããã¾ãããã©ãããããããé¡ããããã¾ãã 2020-06-25 è¿½è¨ ã¯ã¦ãªã°ã«ã¼ãæ¥è¨ã®ã¨ã¯ã¹ãã¼ããã¼ã¿ã¯2020å¹´2æ28
InnoDB ã¯ããã©ã«ãã§ã¯åæI/O *1ã ãã©ã innodb_flush_method=nosyncã£ã¦ããé ããªãã·ã§ã³ããã£ã¦ããããæå¹ã«ãã㨠MyISAM ã¿ãã fsync ããªããªãããã£ã¦ã½ã¼ã¹ã³ã¼ãã¡ãè¦ããèªåãè¨ã£ã¦ãã ãã®è¨å®ãããããã®ã£ã¦ãã©ãããæã ããï¼ MySQL â Wikipedia ã«ãæ¸ãã¦ãããã©ãã¹ã¬ã¼ãéç¨ãã¦ã¦ãã¯ã©ãã·ã¥ããããªã«ããªã§æ°æéããããããã¼ã¿ä¸è²«æ§ãã§ãã¯ãããããã ã£ããããã¯ã¢ãããããªã¹ãã¢ãã¦åéãã¡ãããããããçãªåãã«ã¯ãããããªã®ããããã ã¨ã¯è¨ããfsync ããªãã£ã¦ãã¨ã¯ OS ã®ãã¼ã¸ãã£ãã·ã¥ã«æ¸è¾¼ã¿ãã¼ã¿ãæ»çãããã¨ã«ãªã â buffer_pool åãå¿ è¦ãåºã¦ãã â ç¡é§ãª I/O ãå¢ãããããã§ãè¨å®ããã¡ãªããããããã©ããã¯ç¥ããªããswappiness=0 ã«ãã¨
tmpdirãtmpfsã«ãã¦ã¦ããLOCK_openã2ç§éæ¡ã£ãã¾ã¾ã¨ãorz... innodb_file_per_tableããªãã«ãããããã£ã¨çç¶ãæ¹åããã ãªããç°å¢ã¯ MySQL 5.1.41 (linux, x86_64, innodb_plugin) åè: Slow DROP TABLE - Percona Database Performance Blog (thanks to id:hirose31)
All of Perconaâs open-source software products, in one place, to download as much or as little as you need.
InnoDBã¯MyISAMã¨æ¯è¼ãã¦å®å ¨(OSã¯ã©ãã·ã¥ãé»æºæãçºçãã¦ããã¼ãã«ãå£ããªã)åãæ¸ãè¾¼ã¿ãé ãããã¼ã¿ãã¼ã¹å±ããããããã¨ãããã¯å½ç¶ã®ãã¨ã§MyISAMããããããã ãã¨ãããã¨ã«ãªããã ããããããªããã¯ã¢ããæ©è½ã®ã¤ããRAIDã«ã¼ãã使ããã ãã¨ãã話ã«ãªããã§ããMyISAMã使ã£ã¦ããã¦ã§ãå±ããã®ç¾å ´ã§ã¯ãå ´åã«ãã£ã¦å¤å°ãã¼ã¿ãæ¶ãã¦ããã¾ããªããããå®ããã¼ãã¦ã§ã¢ã§å¤§éã®ã¢ã¯ã»ã¹ãæããã... ã£ã¦ä¹é¢ãããããããªãããªã¼ã¨æã£ã¦ãã ãã®ãããªå ´åã«ã¯ãmy.cnf ã® innodb_flush_log_at_trx_commit ãã©ã¡ã¼ã¿ã調æ´ãããã¨ã§ãMyISAMã«æ¯è©ããæ¸ãè¾¼ã¿é度ãå¾ããã¨ãã§ãã(ãã®ããããã¯ã©ãã·ã¥ãé»æºæã®å ´åã¯ãè¨å®ã«ãã£ã¦ç´è¿ï¼ç§ä»¥å ã®å¤æ´ã失ããã)ã ä»ã®ãã©ã¡ã¼ã¿ãå«ãã¦æ¸ãã¦ããã¨ããã¼ã¿ãã¼
Twitterã§è©±é¡ã«ãªã£ã¦ãã®ã§ç°¡åã«ã¾ã¨ãã¾ããã âMyISAMã«ããç¡ãæ©è½ã使ãããå ´åã¯MyISAMã使ããããªã ã»å ¨ææ¤ç´¢ (TritonnãSphinx) ã»GIS âInnoDBã®å©ç¹(MyISAMã®æ¬ ç¹) â²é害対å¿ç³» ã»ã¯ã©ãã·ã¥ãã¦ãåèµ·åããã ãã§ãªã«ããªãã§ãã ã»ã¯ã©ãã·ã¥ãªã«ããªã«ãããæéã¯ãã¼ãã«ãµã¤ãºã«æ¯ä¾ãããããªãã¨ã¯ãªããã³ãããæ¸ã¿ã®ãã¼ã¿ã¯ä¿®å¾©ã§ãã (巨大ãªMyISAMãã¼ãã«ã®REPAIRã«ã¯æ°æ¥åä½ã§æéãããããã¨ããã) ã»ãªã³ã©ã¤ã³ããã¯ã¢ãããã§ãã ã»INSERTãLOAD DATAãªã©ãå®è¡ãã¦ããéä¸ã§Ctrl+Cã§ãã®æ´æ°ç³»SQLæãæ¢ãã¦ãããã¼ãã«ã¯å£ããªãããä¸éå端ãªç¶æ ã§æ´æ°ããããã¨ãç¡ãããã¹ã¬ã¼ããæ¢ã¾ããã¨ãç¡ã â²æ§è½ç³» ã»è¡ã¬ãã«ããã¯ãªã®ã§ä¸¦åæ§ãé«ã(MyISAMã¯ãã¼ãã«ããã¯)ãã¾ãSEL
ãã¼ã¿ãã¼ã¹ã®éç¨ã§é¿ããããªãã®ããããã¯ç«¶åã«ãã£ã¦èµ·ããã·ã¹ãã ãã©ãã«ã¸ã®å¯¾å¿ã§ããã2æã¾ã§ã«çµããã¯ãã®ãããå¦çãæã«ãªã£ã¦ãçµãã£ã¦ããªããã¨ããè² è·ãé«ãããã§ããªãã®ã«ã·ã¹ãã ãç¡å¿çã«ãªã£ã¦ãããã¨ãã£ããã©ãã«ãçºçããã¨ããDBã¨ã³ã¸ãã¢ã¯ãããããã¯ç«¶åã«ãããã®ãªã®ãã©ãããåãåãã¦ãé©åã«å¯¾å¦ããªããã°ãªãã¾ããã ããã¾ã§InnoDBã¯ããã¯ç«¶åã«å¯¾ãã¦ã»ã¨ãã©æã¤æããªãã£ãã®ã§ãããæè¿ãããã対å¦æ¹æ³ãã§ã¦ãã¾ãããä»æ¥ã¯ãã®æé ã確èªãã¦ããããã¨æãã¾ãã åæ ä»åãç´¹ä»ããæé ã¯ãMySQLã®ä»¥ä¸ã®ãã¼ã¸ã§ã³ã対象ã«ãã¦ãã¾ãã MySQL 5.1ï¼InnoDB Plugin 1.0 MySQL 5.4 ãããªããã¼ãã«ãä¸ãã¦ãã¾ã£ã¦ç³ã訳ããã¾ãããããã¼ã¸ã§ã³5.0以ä¸ãç´ ã®5.1ã§ã¯ä½¿ãã¾ããã®ã§ã注æãã ããã以éã®å®è¡ä¾ã¯ãã¹ã¦
MySQLã®InnoDBã¹ãã¬ã¼ã¸ã¨ã³ã¸ã³ã¯è¡ããã¯ããµãã¼ããã¦ãã¾ãããããOracleã¨åãæè¦ã§ã¢ããªã±ã¼ã·ã§ã³ãä½ã£ã¦ããã¨ãæãã¬ã¨ããã§ãããããã¯ã«åºããããã¨ãããã¾ããããã¯InnoDBã®ããã¯ç¯å²ãOracleãããå¾®å¦ã«åºãããã§ãã å®éã®ä¾ã§ç¢ºèªãã¦ã¿ã¾ãããã mysql> select * from t; +----+------+ | c1 | c2 | +----+------+ | 10 | a | | 15 | a | | 20 | a | | 25 | a | | 30 | a | | 35 | a | | 40 | a | | 45 | a | | 50 | a | +----+------+c1åã¯ä¸»ãã¼ã«ãªã£ã¦ãã¾ãã1ã¤ãã®ã»ãã·ã§ã³ã§ä»¥ä¸ã®SQLãå®è¡ãã¾ãã mysql> set tx_isolation = 'repeatable-r
MySQL5.1ã®GAçãåºã¦ãã8ã¶æä½ããçµéãã¾ããããã¾ã 5.0(ãããã¯ãã以å)ãã¡ã¤ã³ã§ä½¿ã£ã¦ããæ¹ãå¤ãã®ã§ã¯ãªãã§ããããã5.1ã®ä½ãè¯ãã®ããã¾ãã¡åãããªãã¨ããæ¹ãå¤ãããããã¾ããããããªæ¹ã«ã¨ã£ã¦åãããããä¾ã®1ã¤ããã5.1ã§InnoDBã®AUTO_INCREMENTæ§è½ãå¤§å¹ ã«æ¹åããããã¨ããç¹ã§ããç§ã¯ä»äºæWebç³»ã®æè¡è ã®æ¹ã¨è©±ãããæ©ä¼ãããããã¾ãããæå¤ã¨ç¥ããã¦ããªãæ¹åãªã®ã§(ã¾ãã«ãã©ãã£ãã¯ã¨åææ¥ç¶æ°ã®å¤ãWebç³»ã·ã¹ãã ã®ããã®æ¹åãªã®ã«â¦)ãã®æ©ä¼ã«åãä¸ãããã¨ã«ãã¾ãã ç°¡åã«è¨ãã°ãAUTO_INCREMENTãæã¤ãã¼ãã«ã«å¯¾ãã¦INSERTãããã¯ã©ã¤ã¢ã³ãæ°ãæ°åãæ°ç¾ã¨å¢ãã¦ãã£ãæã«ãå¾æ¥ã¯ã¹ã«ã¼ããããææ°é¢æ°çã«è½ã¡ã¦ãã¾ã£ã¦ããã®ãã5.1ã§ã¯é«éãã¤å®å®ããããã«ãªãã¾ããã以ä¸ã«mysqlslapã®I
æè¿ RDBMS ã®ããªã¬ã¼ãè²ã æ¸ãã¦ããã®ã§ãããç¥ããªã人ã«ããªã¬ã¼ãä½ããã¡ãã¡èª¬æããã®ã«ç°¡åãªä¾ã¯ãªãããªãã¨ããã®ã¨ãMySQL ã®å¦çé度ã¯ããªã¬ã¼ã«ãã£ã¦ã©ã®ç¨åº¦å¤åããããã¨ãããã¨ã確èªããããã«ã以ä¸ã®ãããªå®é¨ãè¡ã£ã¦ã¿ã¾ããã InnoDB ã¯ãã°ãã°ããSELECT COUNT(*) ãé ãï¼ãã¨æ¹å¤ããã¾ããã§ã¯ãããªã¬ã¼ã使ã£ã¦è¡æ°ãå¥ã®ãã¼ãã«ã«ãã£ãã·ã¥ããã°ããã®ã§ã¯ãªãã§ããããï¼ã以ä¸ã®ããã«ã極ãã¦å°ããªãã¼ãã« t1 ãä½ãããã®è¡æ°ã t1_cnt ã«ãã£ãã·ã¥ãã¦ã¿ããã¨ã«ãã¾ãã mysql> create table t1 ( ->  id int unsigned not null primary key auto_increment, ->  v int unsigned not null -> ) engine=innodb
ããã«ã¡ã¯ãmixiéçºé¨ã«ã¦ã¢ããªã±ã¼ã·ã§ã³éçºããã¦ãã¾ãyouheiã§ãã ä»åã¯ãMySQL-5.0.45ã®InnoDBã§é£çªã管çãããã¼ãã«ã®ããã©ã¼ãã³ã¹æ¸¬å®ããã¦ããã®ã§ããããã®éã«å°ãå¤ãã£ããããããã¯åé¡ã«ééãã¾ããã®ã§ããã®ãããããã¿ã¨ãã¦æ¸ãã¦ã¿ããã¨æãã¾ãã ã¾ãã¯ãä»å使ç¨ãããã¼ã¿ãã¼ã¹ã®ã¹ãã¼ãã¯ä¸è¨ã®ãããªãã®ã§ãã CREATE TABLE num ( id bigint unsigned NOT NULL default '0' ) Engine=InnoDB; AUTO_INCREMENTã¯ä½¿ç¨ãã¦ãã¾ããã ããã«1ã¬ã³ã¼ãã ãç»é²ãã¾ãã INSERT INTO num (id) values (1); ããã¦å®éé£çªãåå¾ããéã«ã¯ã UPDATE num SET id = LAST_INSERT_ID(id+1); ã¨ãã£ãã¯ã¨ãªã
ãªãªã¼ã¹ãé害æ å ±ãªã©ã®ãµã¼ãã¹ã®ãç¥ãã
ææ°ã®äººæ°ã¨ã³ããªã¼ã®é ä¿¡
å¦çãå®è¡ä¸ã§ã
j次ã®ããã¯ãã¼ã¯
kåã®ããã¯ãã¼ã¯
lãã¨ã§èªã
eã³ã¡ã³ãä¸è¦§ãéã
oãã¼ã¸ãéã
{{#tags}}- {{label}}
{{/tags}}