Go鐃緒申database/sql.Stmt鐃塾ワ申鐃緒申鐃緒申鐃緒申咼鐃銃ワ申鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申鐃緒申 Go鐃祝緒申鐃銃誌申離僖奪鐃緒申鐃緒申鐃緒申鐃緒申泙鐃� 鐃緒申鐃緒申鐃緒申肇鐃俊ュー鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申蠅件申泙鐃緒申鐃緒申鐃�
鐃緒申鐃塾パッワ申鐃熟￥申 database/sql.Stmt 鐃緒申悒咫鐃緒申忙箸辰鐃緒申鐃緒申鐃緒申鐃叔緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃�16鐃緒申鐃緒申鐃淑常申離鐃緒申鐃緒申鐃緒申縫鐃緒申鐃緒申鐃緒申襪件申覆鐃緒申箸鐃緒申鐃緒申鐃緒申鐃緒申鐃処す鐃緒申鐃塾でわ申鐃緒申
鐃緒申鐃緒申鐃緒申鐃獣わ申鐃緒申鐃緒申鐃宿わ申鐃緒申辰鐃縦器申鐃緒申鐃緒申鐃塾わ申鐃夙￥申Go鐃祝パッワ申鐃緒申鐃緒申鐃緒申鐃殉わ申鐃殉での種申鐃緒申匆陲靴泙鐃緒申鐃�
鐃舜件申
鐃緒申鐃� TechEmpower 鐃緒申 FrameworkBenchmarks 鐃夙わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申文鐃緒申鐃�/鐃春レー鐃緒申錙種申鐃緒申鐃銃縁申鐃塾ワ申鐃竣ワ申鐃緒申辰謄戰鐃緒申鐃殉￥申鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申廛鐃緒申鐃緒申鐃緒申鐃緒申箸如鐃緒申鐃緒申Python鐃緒申連鐃塾ワ申鐃銃ナをしてわ申鐃殉わ申鐃緒申 Go鐃祝も興味鐃緒申鐃緒申鐃緒申里如鐃�Gin鐃夙わ申鐃緒申鐃春レー鐃緒申錙種申鐃緒申鐃緒申媛辰鐃緒申鐃緒申螢鰹申鐃緒申疋鐃俊ュー鐃祝誌申鐃獣わ申鐃緒申鐃所し鐃銃わ申鐃殉わ申鐃緒申
2014-05-01 鐃祝行わ申譴随申鐃緒申鐃塾ベワ申鐃緒申沺鐃緒申鐃� Round 9 鐃叔は￥申 PEAK Hosting 鐃緒申鐃渋行環駈申鐃祝加わ申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃塾環駈申鐃熟￥申鐃叔ュア鐃緒申 Xeon E5-2660 v2 鐃塾マワ申鐃緒申鐃� 10Gbit Ethernet 鐃緒申鐃緒申続鐃緒申鐃緒申箸鐃緒申鐃緒申魯鐃緒申鐃緒申撻奪鐃緒申覆鐃塾でわ申鐃緒申
鐃緒申鐃塾環駈申鐃叔￥申鐃緒申鐃緒申鐃峻思議な件申未鐃緒申个討鐃緒申泙鐃緒申鐃緒申鐃渋常申隆超鐃緒申任鐃�Java鐃緒申nginx鐃駿￥申鐃緒申鐃塾環駈申鐃緒申続鐃緒申鐃銃常申未砲弔鐃緒申討鐃緒申鐃緒申鐃緒申未鐃�Go鐃塾フレー鐃緒申錙種申鐃緒申鐃緒申鐃緒申造濬鐃縮わ申鐃緒申箸鐃緒申鐃�Scala, node.js, php 鐃塾件申鐃縮フレー鐃緒申錙種申鐃緒申砲泙鐃緒申蕕縁申討鐃緒申泙辰討鐃緒申鐃緒申里任鐃緒申鐃�
2014-11-02 鐃緒申 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申廛鐃所ク鐃緒申鐃緒申鐃緒申 鐃緒申鐃出場し鐃殉わ申鐃緒申鐃緒申鐃緒申鐃塾プワ申螢�鐃緒申鐃緒申鐃夙は￥申 *sql.DB 鐃緒申複鐃緒申鐃緒申鐃初ウ鐃緒申疋鐃緒申咼鐃緒申鐃緒申鐃術わ申鐃暑こ鐃夙でワ申鐃獣ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申鐃塾でわ申鐃緒申鐃緒申
鐃緒申鐃緒申鐃緒申蕕鰹申僚鐃緒申鐃緒申鐃祝￥申鐃夙随申个任鐃緒申鐃緒申鐃緒申鐃緒申離廛鐃緒申鐃緒申鐃緒申鐃緒申箸鐃獣縁申縫魯鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾わ申里任呂覆鐃緒申鐃緒申謄侫譟種申鐃緒ー鐃緒申鐃緒申 鐃緒申鐃緒申的鐃緒申 鐃緒申鐃緒申鐃宿のワ申鐃緒申廛鐃夙￥申鐃緒申鐃塾醐申鐃緒申的鐃淑ワ申鐃緒申鐃宿わ申鐃宿れく鐃初い鐃緒申鐃緒申能鐃緒申个鐃緒申里鐃緒申了鐃緒申鐃緒申佑鐃渋随申鐃緒申凌佑鐃緒申鷆，鐃緒申襪随申鐃塾わ申里任鐃緒申鐃� *sql.DB 鐃緒申複鐃緒申鐃緒申鐃塾わ申鐃淳計意図と異なり、鐃緒申鐃殉り現鐃緒申的鐃淑わ申里砲牢鐃緒申鐃緒申鐃緒申泙鐃緒申鐃叔わ申鐃緒申鐃緒申
database/sql 鐃緒申鐃淳計につわ申鐃緒申
鐃緒申鐃緒申鐃緒申鐃銃誌申鐃緒申董鐃� database/sql 鐃塾器申鐃緒申鐃淳計につわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃殉わ申鐃緒申 Go 鐃叔デ￥申鐃緒申鐃駿￥申鐃緒申鐃緒申箸鐃緒申廛鐃緒申鐃緒申鐃緒申鐃書いわ申鐃出醐申鐃塾わ申鐃緒申鐃緒申鐃熟わ申鐃塾ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃宿わ申鐃緒申鐃出わ申鐃銃わ申鐃緒申鐃緒申鐃緒申鐃緒申
database/sql 鐃熟￥申 PHP 鐃叔わ申鐃緒申 PDO 鐃塾よう鐃祝￥申鐃銃種申如鐃緒申鐃緒申戞鐃緒申鐃緒申鐃緒申鐃渋鰹申鐃緒申鐃宿ライ鐃出の常申鐃緒申錣居申蝓�鐃緒申鐃曙し鐃緒申鐃緒申鐃藷タフワ申鐃緒申鐃緒申鐃緒申鐃藷供わ申鐃殉わ申鐃緒申鐃純え鐃緒申 MySQL 鐃叔わ申鐃緒申鐃� go-sql-drivers/mysql 鐃緒申鐃緒申鐃緒申有名鐃淑ドライ鐃出になわ申泙鐃緒申鐃緒申罅種申鐃緒申鐃緒申牢鐃緒申鐃重�鐃祝はドライ鐃出わ申直鐃緒申鐃緒申鐃術わ申鐃暑こ鐃夙はわ申鐃殉わ申鐃緒申
database/sql 鐃緒申鐃醇心鐃祝なわ申里鐃� sql.DB 鐃叔わ申鐃緒申鐃緒申鐃緒申魯鐃緒申優鐃緒申鐃緒申鐃緒申廖鐃緒申鐃祝なってわ申鐃銃￥申鐃淑駕申鐃塾よう鐃淑使わ申鐃緒申鐃薯しまわ申鐃緒申
DB.Exec()鐃緒申DB.Query()鐃緒申直鐃旬ワ申鐃緒申鐃緒申鐃緒申蠅駕申鐃�DB.Prepare()鐃叔プワ申撻鐃緒申疋鐃緒申董鐃緒申肇鐃緒申箸鐃宿緒申鐃�Stmt鐃緒申鐃瞬ワ申鐃緒申鐃緒申鐃夙わ申鐃所、Stmt.Exec()鐃緒申Stmt.Query()鐃緒申箸鐃�DB.Begin()鐃叔トワ申鵐競鐃緒申鐃緒申鐃緒申鐃宿緒申鐃�Tx鐃緒申鐃瞬ワ申鐃緒申鐃緒申鐃夙わ申鐃所、Tx.Exec()鐃緒申Tx.Query()鐃緒申箸鐃�
鐃夙ワ申鵐競鐃緒申鐃緒申鐃緒申鐃夙わ申鐃緒申鐃緒申 Tx 鐃緒申鐃瞬ワ申鐃緒申鐃緒申鐃夙わ申 DB 鐃緒申鐃緒申鐃緒申鐃緒申奪鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申鐃緒申優鐃緒申鐃緒申鐃緒申鐃緒申飮鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃淑鰹申鐃塾常申鐃緒申 DB 鐃緒申鐃竣￥申鐃暑し鐃銃わ申鐃暑コ鐃粛ワ申鐃緒申鐃緒申鐃塾わ申鐃緒申鐃曙か鐃叔ワ申鐃緒申鐃所が鐃渋行わ申鐃曙、鐃醇ー鐃緒申鐃緒申鐃熟ワ申鐃粛ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃瞬わ申鐃夙わ申鐃叔わ申鐃殉わ申鐃緒申 (鐃緒申鐃緒申鐃塾ワ申鐃出￥申鐃叔わ申鐃銃わ申鐃淑わ申鐃醇ー鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃出縁申鐃緒申鐃暑た鐃潤、 Go 1.5 鐃叔はトワ申鵐競鐃緒申鐃緒申鐃緒申覆鐃緒申妊鐃緒申優鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃獣ワ申鐃緒申鐃緒申鐃夙わ申鐃銃使わ申 API 鐃緒申鐃宿加わ申鐃緒申觚�鐃緒申鐃淳でわ申鐃緒申)
1鐃瞬わ申鐃緒申法鐃緒申箸鐃緒申鐃順、 DB.Query() 鐃熟ドライ鐃出わ申鐃竣レー鐃緒申鐃循ワ申鐃緒申鐃緒申峇鐃緒申鐃緒申弍鐃緒申鐃緒申討鐃緒申覆鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃� DB.Prepare(), Stmt.Exec(), Stmt.Close() 鐃緒申圓鐃緒申泙鐃緒申鐃�1鐃緒申離鐃緒申鐃緒申鐃緒申3鐃緒申離薀�鐃緒申疋肇鐃獣プわ申発鐃緒申鐃緒申鐃緒申里鐃緒申鐃叔重�鐃祝わ申鐃緒申鐃緒申鐃祝なわ申泙鐃緒申鐃� go-sql-drivers/mysql 鐃緒申廛譟種申鐃緒申曠鐃緒申鐃瞬器申鐃緒申鐃出縁申鐃緒申鐃銃わ申鐃淑わ申 (鐃出縁申鐃緒申鐃暑た鐃緒申離廛鐃所ク鐃緒申鐃緒申鐃緒申 鐃緒申鐃所げ鐃銃わ申鐃銃居申鐃緒申鐃緒申任鐃�) 鐃塾で￥申 2鐃瞬わ申鐃緒申法鐃緒申鐃緒申鐃緒申鐃緒申能鐃緒申鐃出るこ鐃夙になわ申泙鐃緒申鐃�
2鐃瞬わ申鐃緒申法鐃緒申鐃緒申鐃術わ申鐃緒申鐃順、 Stmt 鐃緒申鐃銃ドライ鐃出わ申 prepare 鐃緒申鐃緒申鐃緒申未鐃� DB 鐃緒申離鐃緒申優鐃緒申鐃緒申鐃緒申箸鐃緒申弍鐃緒申鐃緒申鐃緒申鐃緒申鐃銃わ申鐃緒申鐃塾で￥申鐃醇ー鐃緒申鐃緒申鐃熟どわ申鐃緒申続鐃緒申 Prepare 鐃薯しわ申鐃塾わ申鐃薯気にわ申鐃緒申必鐃竣はわ申鐃緒申泙鐃緒申鵝�削申鐃緒申鐃緒申鐃緒申鐃熟わ申鐃緒申鐃緒申分鐃緒申鐃粛ッワ申鐃祝なってわ申鐃殉わ申鐃緒申
鐃緒申鐃塾よう鐃緒申鐃淳計になってわ申鐃暑た鐃緒申法鐃� DB 鐃緒申鐃塾わ申複鐃緒申鐃緒申鐃縦のはワ申鐃曙ギ鐃緒申蕁種申併箸鐃緒申鐃緒申如鐃�1鐃縦のデ￥申鐃緒申鐃駿￥申鐃緒申鐃緒申鐃緒申鐃緒申1鐃縦わ申 DB 鐃緒申鐃緒申鐃緒申鐃緒申能鐃緒申鐃緒申鐃緒申鐃緒申鐃暑す鐃緒申茲�鐃祝わ申鐃緒申里鐃緒申鐃緒申曚任鐃緒申鐃�
調鐃緒申
鐃殉わ申鐃緒申鐃緒申鐃楯わ申発鐃緒申鐃緒申鐃銃わ申鐃緒申 PEAK Hosting 鐃祝近い鐃縦駈申鐃緒申鐃術意わ申鐃緒申必鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃� AWS 鐃緒申 c3.8xlarge 鐃塾マワ申鐃緒申鐃�2鐃醇、鐃緒申張鐃粛ットワー鐃緒申鐃藷グわ申有鐃緒申鐃祝わ申鐃銃￥申同鐃緒申鐃� placement group 鐃緒申鐃緒申鐃瞬わ申鐃暑こ鐃夙で￥申32鐃緒申鐃緒申鐃塾マワ申鐃緒申鐃�10Gbit鐃塾逸申鐃所し鐃緒申鐃粛ットワー鐃緒申鐃緒申鐃緒申続鐃緒申鐃緒申鐃縦駈申鐃緒申鐃術意わ申鐃暑こ鐃夙わ申鐃叔わ申鐃殉わ申鐃緒申 Amazon Linux AMI 鐃緒申箸鐃緒申弌鐃緒申妊侫鐃緒申鐃夙で鰹申張鐃粛ットワー鐃緒申鐃藷グわ申有鐃緒申鐃祝なってわ申鐃緒申里燃擇任鐃緒申鐃� 鐃緒申鐃楯ットワ申鐃藷スワ申鐃藷スわ申鐃緒申鐃術わ申鐃緒申弌鐃�2鐃緒申鐃� c3.8xlarge 鐃熟わ申鐃緒申鐃緒申鐃緒申 $0.7/h 鐃叔借わ申襪鰹申箸鐃緒申任鐃緒申泙鐃緒申鐃�
鐃緒申鐃祝￥申鐃駿ワ申鐃緒申沺鐃緒申鐃緒申鬚�わ申鐃緒申鐃緒申鐃所が鐃銃醐申鐃緒申鐃暑こ鐃夙わ申鐃叔э申鐃緒申弔帖鐃� top 鐃緒申鐃殉ワ申匹鐃�CPU鐃緒申鐃緒申鐃術常申鐃緒申鐃緒申鐃叔э申鐃緒申泙鐃緒申鐃� Mutex 鐃緒申箸辰鐃緒申鐃緒申奪鐃緒申蓮鐃緒申鐃緒申奪鐃緒申鬚垢鐃緒申房鐃緒申鐃緒申任鐃緒申鐃緒申鐃緒申鐃緒申礇鰹申鐃緒申箸任鐃緒申鐃緒申鐃緒申鐃緒申腓件申鐃緒申鐃緒申呂鐃緒申鐃緒申鐃緒申鐃�CPU鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃書しまわ申鐃緒申 鐃緒申鐃緒申砲覆辰討鐃緒申鐃� Mutex 鐃緒申長鐃緒申鐃瞬ワ申鐃獣ワ申鐃緒申鐃緒申討鐃緒申鐃緒申鐃熟￥申動鐃緒申任鐃緒申襯刻申鐃獣ドわ申鐃緒申鐃緒申里鐃�CPU鐃緒申鐃緒申率鐃緒申鐃純く鐃淑り、短鐃緒申鐃瞬わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃祝にワ申鐃獣ワ申鐃緒申鐃緒申鐃緒申鐃熟ワ申鐃獣ワ申鐃塾駈申鐃緒申鐃夙�鐃緒申鐃緒申鐃駿わ申鐃純し鐃緒申鐃淑り、鐃緒申能鐃緒申鐃緒申鐃緒申鐃緒申鐃祝ワ申鐃緒申鐃緒申鐃暑し鐃銃なわ申鐃緒申砲鐃�CPU鐃緒申鐃緒申率鐃熟高く鐃淑る傾鐃緒申鐃祝わ申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃熟どわ申鐃初か鐃夙わ申鐃緒申鐃夙醐申圓鐃緒申箸鐃緒申鐃緒申鐃緒申箸鐃緒申鐃叔э申任鐃緒申泙鐃緒申鐃緒申鐃�
鐃叔醐申法鐃� net/http/pprof 鐃緒申鐃緒申鐃術わ申鐃銃￥申鐃緒申鐃緒申鐃緒申鐃緒申鐃所し鐃殉わ申鐃緒申 net/http/pprof 鐃緒申CPU鐃竣ワ申鐃春ワ申鐃緒申鐃緒申鐃熟わ申鐃緒申鐃緒申弔鐃緒申凌鐃緒申乃鐃叔緒申鐃緒申鐃緒申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃獣ワ申鐃緒申鐃緒申念鐃緒申鐃緒申鐃緒申立鐃縦のわ申 full stack dump 鐃叔わ申鐃緒申鐃渋際のワ申鐃緒申鐃獣ワ申鐃緒申鐃緒申廚鐃� 鐃緒申鐃緒申鐃緒申 鐃祝なわ申泙鐃緒申鐃�
鐃殉わ申鐃緒申多鐃緒申鐃緒申 goroutine 鐃緒申鐃淳まってわ申鐃緒申 Mutex.Lock() 鐃薯見つわ申鐃殉わ申鐃緒申鐃緒申鐃緒申両鐃緒申麓鐃緒申里茲�鐃淑ワ申鐃緒申鐃獣ワ申鐃夙レー鐃緒申鐃叔止まってわ申鐃緒申鐃順が多鐃緒申鐃塾わ申鐃緒か鐃緒申泙鐃緒申鐃� 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃宿でわ申 鐃緒申鐃緒申鐃緒申分 鐃祝なわ申泙鐃緒申鐃�
goroutine 81 [semacquire]: sync.(*Mutex).Lock(0xc2080c42d0) /home/ec2-user/local/go/src/sync/mutex.go:66 +0xd3 database/sql.(*Stmt).connStmt(0xc2080c4280, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) /home/ec2-user/local/go/src/database/sql/sql.go:1357 +0xa6 database/sql.(*Stmt).Query(0xc2080c4280, 0xc2089a1be8, 0x1, 0x1, 0x0, 0x0, 0x0) /home/ec2-user/local/go/src/database/sql/sql.go:1438 +0x120
鐃緒申鐃緒申鐃瞬醐申鐃緒申鐃祝駈申鼎鐃緒申討鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃淑�鐃緒申鐃夙人わ申鐃緒申鐃叔醐申鐃緒申鐃暑こ鐃夙はでわ申鐃殉わ申鐃藷。ワ申鐃獣ワ申鐃緒申鐃緒申蓮鐃緒申鐃緒申奪鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃駿とワ申鐃獣ワ申鐃緒申鐃緒申辰討鐃緒申鐃緒申鐃瞬の掛わ申鐃緒申鐃緒申鐃緒申鐃緒申砲覆鐃塾わ申鐃出わ申鐃銃￥申鐃緒申鐃緒申鐃獣ワ申鐃緒申鐃緒申廚任鐃緒申鐃緒申戮鐃渋随申鐃緒申鐃淑�鐃緒申多鐃緒申表鐃緒申鐃緒申鐃緒申襪�鐃緒申任鐃緒申鐃�
鐃緒申鐃緒申鐃叔￥申鐃緒申鐃緒申鐃銃縁申鐃緒申鐃緒申鐃緒申奪鐃緒申鐃緒申鐃竣わ申鐃緒申鐃緒申鐃緒申鐃緒申罎�鐃初、鐃緒申鐃緒申 Stmt.mu 鐃塾ワ申鐃獣ワ申鐃緒申鐃緒申辰討鐃緒申鐃緒申里鐃獣居申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃夙種申鐃塾ワ申鐃緒申鐃獣ワ申鐃緒申鐃緒申廚鐃緒申鐃緒申弔鐃緒申鐃殉わ申鐃緒申
goroutine 158 [semacquire]: sync.(*Mutex).Lock(0xc208096de0) /home/ec2-user/local/go/src/sync/mutex.go:66 +0xd3 database/sql.(*DB).connIfFree(0xc208096dc0, 0xc2083080c0, 0x0, 0x0, 0x0) /home/ec2-user/local/go/src/database/sql/sql.go:695 +0x67 database/sql.(*Stmt).connStmt(0xc2080c4280, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0) /home/ec2-user/local/go/src/database/sql/sql.go:1378 +0x316
Stmt.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申鐃塾わ申鐃緒申曚匹鐃銃縁申鐃緒申鐃緒申屬覆里任鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃叔削申鐃駿わ申 DB.mu 鐃塾ワ申鐃獣ワ申鐃緒申鐃峻ってわ申鐃暑こ鐃夙わ申鐃緒か鐃緒申泙鐃緒申鐃� Stmt.connStmt() 鐃緒申 DB.connIfFree() 鐃塾ワ申鐃緒申鐃宿わ申鐃宿わ申函鐃� connStmt() 鐃緒申 Stmt.css (prepare 鐃術みのワ申鐃粛ワ申鐃緒申鐃緒申鐃緒申 stmt 鐃塾ペワ申鐃緒申鐃緒申鐃緒申鐃緒申討鐃緒申鐃所ス鐃緒申) 鐃緒申鐃出わ申鐃銃ルー鐃竣わ申鐃縦つ￥申 connIfFree() 鐃緒申討喀个鐃緒申鐃� connIfFree() 鐃緒申鐃緒申鐃� DB.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申襪随申鐃祝￥申 DB.mu 鐃緒申鐃盾い鐃緒申鐃駿でワ申鐃獣ワ申鐃緒申鐃緒申討鐃緒申鐃塾わ申鐃緒か鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申両鐃緒申鐃� Stmt.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申鐃�1鐃縦わ申 goroutine 鐃緒申鐃緒申同鐃緒申鐃祝わ申鐃淑わ申鐃塾で￥申他鐃塾常申鐃緒申 DB.mu 鐃塾ワ申鐃獣ワ申鐃夙駈申鐃順し鐃銃わ申鐃緒申茲�鐃叔わ申鐃緒申鐃緒申鐃駿はワ申鐃緒申鐃獣ワ申鐃緒申鐃緒申廚里覆鐃緒申鐃緒申蕁� DB.mu 鐃塾ワ申鐃獣ワ申鐃緒申鐃緒申辰討鐃緒申里鐃獣居申鐃緒申泙鐃緒申鐃緒申鐃緒申鐃夙￥申 DB.addDep() 鐃塾ワ申鐃獣ワ申鐃緒申鐃緒申帽圓鐃緒申鐃緒申鐃緒申鐃殉わ申鐃緒申
# DB.mu 鐃緒申鐃緒申辰討鐃緒申鐃� DB.addDep goroutine 18 [runnable]: database/sql.(*DB).addDep(0xc208096dc0, 0x7f0932f0e4d8, 0xc2080c4280, 0x73d340, 0xc2082ec540) /home/ec2-user/local/go/src/database/sql/sql.go:362 database/sql.(*Stmt).Query(0xc2080c4280, 0xc2087cbbe8, 0x1, 0x1, 0x0, 0x0, 0x0) /home/ec2-user/local/go/src/database/sql/sql.go:1455 +0x49a # DB.mu 鐃緒申鐃峻ってわ申鐃緒申 DB.addDep. 鐃緒申鐃緒申鐃銃縁申鐃緒申鐃緒申鐃緒申奪鐃緒申鐃緒申鐃竣わ申多鐃緒申. goroutine 64 [semacquire]: sync.(*Mutex).Lock(0xc208096de0) /home/ec2-user/local/go/src/sync/mutex.go:66 +0xd3 database/sql.(*DB).addDep(0xc208096dc0, 0x7f0932f0e4d8, 0xc2080c4280, 0x73d340, 0xc2085f0540) /home/ec2-user/local/go/src/database/sql/sql.go:364 +0x38 database/sql.(*Stmt).Query(0xc2080c4280, 0xc20899fbe8, 0x1, 0x1, 0x0, 0x0, 0x0) /home/ec2-user/local/go/src/database/sql/sql.go:1455 +0x49a
鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃縦逸申鐃叔わ申鐃殉わ申鐃緒申鐃緒申
Stmt.connStmt()鐃緒申(鐃緒申鐃重�)長鐃緒申鐃緒申Stmt.mu鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申鐃塾で￥申Stmt鐃緒申鐃緒申鐃殉りた鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃銃逸申鐃緒申覆鐃緒申鐃�Stmt.connStmt()鐃熟件申鐃緒申鐃瞬わ申DB.connIfFree()鐃緒申討喀个鐃緒申鐃緒申鐃緒申鐃緒申鐃�DB.mu鐃塾ワ申鐃獣ワ申鐃緒申鐃緒申鐃順し鐃銃わ申鐃暑た鐃緒申鐃駿わ申鐃淑る。DB.mu鐃塾ワ申鐃獣ワ申鐃緒申鐃緒申鐃緒申鐃緒申DB.addDep()
鐃緒申鐃緒申1: DB.mu 鐃緒申分離鐃緒申鐃緒申
DB.addDep() 鐃緒申鐃宿わ申任澆鐃夙￥申鐃緒申鐃夙ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申妊螢緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃銃わ申鐃銃￥申鐃叔醐申縫螢緒申鐃緒申鐃緒申硫鐃緒申鐃緒申鐃峻ってわ申鐃緒申茲�鐃叔わ申鐃緒申
鐃緒申鐃夙ワ申鐃緒申鐃緒申箸伐鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃暑た鐃緒申鐃� map 鐃緒申鐃暑た鐃緒申鐃� DB.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申鐃緒申鐃渋常申鐃緒申討鐃緒申泙鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申立鐃緒申鐃緒申 Mutex 鐃緒申分離鐃叔わ申鐃殉わ申鐃緒申
DB.connIfFree() 鐃緒申 DB.mu 鐃緒申鐃緒申鐃獣ワ申鐃緒申鐃緒申魑�わ申鐃緒申鐃淑わ申鐃緒申仆鐃淑�鐃緒申速鐃緒申鐃淑わ申鐃叔緒申鐃緒申鐃緒申鐃緒申蝓�鐃緒申鐃緒申覆蘓駈申鐃緒申颪い鐃緒申鐃緒申鐃術刻申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申茲刻申襪鰹申箸鐃緒申任鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申鐃緒申鐃緒申鐃渋際にワ申鐃獣ワ申鐃緒申分離鐃緒申鐃銃みわ申鐃夙わ申鐃緒申鐃緒申2鐃緒申鐃緒申鐃駿わ申鐃緒申鐃緒申能鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 DB 鐃緒申鐃塾わ申複鐃緒申鐃緒申鐃獣てラウ鐃緒申疋鐃緒申咼鵑垢鐃塾わ申鐃緒申戮鐃夙まわ申鐃緒申能鐃緒申鐃緒申鐃淑り悪鐃緒申鐃叔わ申鐃緒申
DB.mu 鐃塾ワ申鐃獣ワ申鐃緒申鐃緒申鐃緒申茲件申討癲� Stmt.connStmt() 鐃緒申 Stmt.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申鐃緒申鐃渋�鐃緒申鐃殉わ申鐃駿わ申鐃塾わ申 Stmt.mu 鐃塾ワ申鐃獣ワ申鐃緒申鐃順が鐃緒申茲居申鐃銃なわ申鐃処う鐃叔わ申鐃緒申
Mutex 鐃緒申分離鐃熟パッワ申鐃緒申鐃所げ鐃縦つ￥申 Stmt.connStmt() 鐃塾刻申速鐃緒申鐃祝常申鐃出わ申鐃殉わ申鐃緒申
鐃緒申鐃緒申2: Stmt.connStmt() / DB.connIfFree() 鐃塾刻申速鐃緒申
Stmt.connStmt() 鐃緒申 Stmt.css 鐃緒申鐃出わ申鐃銃ルー鐃竣わ申 DB.connIfFree() 鐃緒申討喀个鐃緒申討鐃緒申鐃塾でわ申鐃緒申鐃緒申鐃緒申鐃塾ルー鐃竣わ申 prepare 鐃術みわ申鐃緒申続鐃緒申鐃緒申鐃緒申鐃銃わ申鐃緒申鐃初そ鐃緒申鐃緒申鐃緒申僂鐃緒申鐃夙わ申鐃緒申鐃緒申的鐃夙￥申 prepare 鐃術みわ申鐃緒申続鐃緒申 close 鐃緒申鐃緒申討鐃緒申鐃緒申鐃� Stmt.css 鐃緒申鐃緒申鐃緒申遒刻申鐃夙わ申鐃緒申2鐃縦わ申鐃緒申的鐃緒申鐃緒申鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申続鐃緒申 close 鐃緒申鐃緒申討鐃緒申襪�鐃宿わ申鐃緒申鐃緒申鐃緒申鐃術わ申鐃緒申討鐃緒申襪�鐃宿わ申鐃緒申鐃熟￥申 DB.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申鐃緒申鐃緒申鐃出￥申 DB 鐃塾ワ申鐃出を参照わ申鐃淑わ申鐃銃わ申鐃渋�鐃緒申判鐃緒申任鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申鐃叔￥申 Stmt.connStmt() 鐃緒申鐃緒申痢鐃� Stmt.css 鐃緒申鐃出わ申鐃緒申襦種申廚粒鐃渋�鐃緒申直鐃緒申 DB.mu 鐃緒申鐃緒申奪鐃緒申鐃緒申討鐃緒申泙鐃緒申鐃緒申覆鐃緒申鐃緒申鐃緒申鐃渋鰹申離鐃緒申鐃緒申奪鐃緒申鐃暑ー鐃緒申鐃緒申鐃縦常申楾圓鐃� DB.connIfFree() 鐃塾呼び出わ申鐃薯減らす鐃緒申鐃緒申鐃緒申圓辰鐃緒申箸鐃緒申鐃緒申鐃緒申鐃緒申戮鐃淑ｏ申鐃� DB 鐃塾ラウ鐃緒申疋鐃緒申咼鐃緒申同鐃緒申鐃緒申鐃駿わ申速鐃駿わ申鐃叔わ申茲�鐃祝なわ申泙鐃緒申鐃緒申鐃�
鐃緒申鐃緒申鐃緒申鐃緒申鐃縮随申箸鐃緒申討泙鐃緒申僖奪鐃緒申鐃緒申蠅駕申泙鐃緒申鐃� 鐃緒申鐃緒申
Go 鐃祝パッワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申泙鐃�
鐃夙りあ鐃緒申鐃緒申 Go 鐃緒申 Contribution Guideline 鐃緒申鐃宿みまわ申鐃順う鐃緒申 鐃淑駕申鐃緒申鐃緒申鐃縦まわ申鐃緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃�
鐃叔緒申鐃� Github Issue 鐃叔緒申鐃緒申鐃緒申鐃緒申泙鐃緒申鐃緒申鐃緒申砲砲弔鐃緒申胴鐃春わ申箸辰討鐃緒申鐃緒申泙鐃緒申鐃�
鐃緒申鐃緒申鐃緒申呂鐃緒申鐃緒申鐃祝￥申 Google 鐃緒申 CLA 鐃祝緒申名鐃緒申鐃銃わ申鐃緒申鐃殉わ申鐃順う鐃緒申 鐃緒申鐃緒申
Go鐃塾ワ申櫂鐃緒申肇鐃熟最駈申 Mercurial 鐃緒申鐃緒申 Git 鐃祝移行わ申鐃殉わ申鐃緒申鐃緒申鐃緒申Github鐃祝移行わ申鐃緒申鐃緒け鐃叔はわ申鐃緒申泙鐃緒申鐃� Github 鐃緒申 Issue Tracker 鐃夙￥申鐃緒申櫂鐃緒申肇鐃塾ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申僂鐃緒申鐃銃わ申鐃殉わ申鐃緒申鐃緒申鐃所ジ鐃淑ワ申離鐃楯ワ申鐃夙ワ申両鐃緒申鐃� https://go.googlesource.com/go 鐃淑ので￥申 github 鐃緒申鐃緒申 clone 鐃緒申鐃銃わ申鐃緒申覆鐃� git upstream set-url 鐃淑どわ申 origin 鐃塾醐申鐃緒申鐃緒申鐃緒申僂鐃緒申鐃宿�鐃竣わ申鐃緒申鐃緒申泙鐃緒申鐃�
Go 鐃塾ワ申鐃緒申鐃宿ワ申咼紂種申鐃� Gerrit 鐃叔行わ申鐃銃わ申鐃殉わ申鐃緒申鐃緒申鐃緒申鐃祝ワ申鐃緒申鐃緒申鐃緒申鐃緒申鐃銃ワ申鐃緒申鐃緒申鐃藷し￥申鐃緒申鐃殉ワ申疋薀わ申鐃縦￥申鐃暑か鐃緒申僖奪鐃緒申鐃緒申蠅駕申鐃塾わ申必鐃竣なパワ申鐃緒ー鐃宿わ申発鐃峻わ申鐃銃わ申鐃緒申鐃殉わ申鐃緒申
鐃緒申鐃祝￥申 git-codereview 鐃夙わ申鐃緒申鐃縦￥申鐃緒申鬟ぅ鵐好函鐃緒申襪件申泙鐃緒申鐃�
go get -u golang.org/x/review/git-codereview
鐃緒申鐃塾ツ￥申鐃緒申蓮鐃緒申僖奪鐃緒申鐃�1鐃緒申鐃淳ットのブワ申鐃緒申鐃夙わ申鐃緒申鐃緒申鐃叔器申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾パッワ申鐃緒申 gerrit 鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾でわ申鐃緒申 git 鐃祝器申鐃曙た鐃粛醐申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申伴鐃緒申里茲�鐃祝なわ申泙鐃緒申鐃�
git codereview change fix-abc鐃緒申git checkout -b fix-abc鐃緒申鐃緒申git codereview change鐃熟￥申鐃叔緒申離鐃緒申潺奪箸任鐃緒申鐃緒申git commit鐃緒申鐃緒申鐃緒申2鐃緒申鐃旬以降わ申git commit --amend鐃緒申鐃緒申. (commit鐃緒申同鐃緒申-a鐃緒申鐃緒申鐃術駕申能).git codereview sync鐃緒申git fetch origin && git rebase origin/master鐃緒申鐃緒申git codereview mail -diff鐃緒申git diff HEAD..master鐃緒申鐃緒申git codereview mail鐃緒申 Gerrit 鐃祝パッワ申鐃緒申鐃緒申鐃緒申
鐃術ッワ申鐃緒申鐃所げ鐃緒申肇鐃俊ュー鐃緒申鐃熟まわ申泙鐃緒申鐃� (Go 鐃塾鰹申発鐃熟とてわ申鐃夙�鐃叔￥申鐃緒申旦鐃祝パッワ申鐃緒申鐃所げ鐃緒申鐃初そ鐃緒申鐃緒申鐃塾わ申鐃緒申鐃祝ワ申鐃緒申鐃夙わ申鐃縦わ申鐃銃びっわ申鐃所し鐃殉わ申鐃緒申)
- 鐃緒申泙鐃緒申鐃緒申澤鐃�
- 鐃緒申鐃緒申鐃宿の緒申鐃緒申鐃緒申鐃緒申鐃淳ットワ申鐃緒申鐃塾緒申鐃緒申
- 鐃銃ワ申鐃夙の緒申鐃緒申
- 鐃緒申鐃緒申鐃夙の緒申鐃緒申
鐃夙わ申鐃緒申鐃緒申鐃緒申鐃叔￥申鐃緒申咼紂種申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申椶辰討鐃緒申鐃緒申鐃淑ｏ申鐃緒申鐃� Googler 鐃緒申鐃初繰鐃緒申鐃瞬わ申鐃緒申咼紂種申鐃緒申鐃緒申鐃殉わ申鐃緒申
鐃緒申咼紂種申鐃緒申未辰鐃緒申鐃緒申鐃�
鐃緒申咼紂種申僚鐃緒申鐃叔￥申 prepare 鐃術みわ申鐃緒申続鐃緒申優鐃処し鐃銃使わ申鐃夙わ申鐃緒申鐃緒申鐃緒申鐃緒申鐃塾わ申辰鐃緒申覆鐃緒申鐃緒申鐃緒申縫鐃緒申鐃竣ワ申鐃緒申澤廚砲覆鐃殉わ申鐃緒申鐃緒申 鐃緒申鐃緒申鐃� Github Issue 鐃塾誌申鐃緒申鐃緒申鐃緒申討鐃緒申鐃銃わ申鐃緒申鐃緒申鐃祝で￥申鐃緒申鐃緒申鐃夙ワ申鐃緒申鐃夙わ申鐃宿わ申任鐃緒申鐃緒申个鐃緒申澆鐃緒申鐃縮居申未併鐃緒申屬鐃淑わ申鐃緒申鐃熟わ申鐃叔わ申鐃緒申
鐃銃ワ申鐃夙につわ申鐃銃は￥申鐃緒申存鐃塾ベワ申鐃緒申沺鐃緒申鐃緒申鐃緒申単鐃祝緒申鐃緒申鐃緒申鐃銃わ申鐃緒申鐃塾でわ申鐃緒申鐃緒申平鐃緒申鐃緒申鐃塾ベワ申鐃緒申沺鐃緒申鐃緒申鐃� RunParallel 鐃緒申箸鐃緒申茲�鐃祝誌申摘鐃緒申鐃緒申董鐃緒申鐃緒申里泙泙鐃緒申鐃緒申鐃緒申鐃夙わ申鐃銃使わ申鐃緒申茲�鐃淑ワ申鐃緒申廛鐃薯コワ申鐃夙わ申鐃銃わ申蕕わ申泙鐃緒申鐃緒申鐃緒申鐃渋醐申離侫鐃緒申鐃緒申鐃塾上下鐃緒申鐃曙ガ鐃緒申鐃緒申鐃淑ら自分鐃塾緒申鐃緒申鐃緒申分鐃緒申譽�鐃緒申鐃緒申鐃淑緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒け鐃叔はなわ申鐃処う鐃叔わ申鐃緒申
鐃叔醐申鐃緒申鐃緒申蓮鐃緒申鐃緒申鐃緒申箸鐃緒申仂盜圓留鐃緒申暴颪�とわ申鐃熟種申鐃緒申鐃塾�鐃緒申鐃銃わ申鐃緒申鐃緒申鐃宿￥申長鐃緒申鐃淑っわ申鐃出象行の常申飽鐃銃逸申鐃緒申鐃淑わ申鐃緒申鐃緒申伴鐃曙か鐃緒申颪�始わ申鐃夙わ申鐃緒申鐃術醐申旅鐃淑醐申鐃緒申鐃緒申鐃緒申鵑靴覆鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申匹抜愀鐃緒申覆鐃緒申鐃重�鐃夙緒申鐃緒申鐃塾件申鐃緒申鐃瞬わ申鐃叔わ申鐃緒申鐃緒申鐃叔緒申的鐃祝種申鐃緒申鐃殉わ申鐃殉でにパッワ申鐃緒申鐃緒申鐃獣わ申鐃緒申鐃緒申鐃�13鐃緒申砲覆鐃殉わ申鐃緒申鐃緒申
鐃瞬っわ申鐃純け鐃銃醐申鐃緒申鐃出￥申調鐃緒申鐃緒申未鐃旬細わ申 Issue 鐃緒申鐃緒申陲垢鐃緒申鐃緒申鐃叔止わ申討鐃緒申鐃緒申董鐃緒申尊櫃僚鐃緒申鐃緒申鐃� Googler 鐃緒申任鐃緒申鐃銃わ申鐃殉っわ申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申任覆鐃緒申鐃俊ュー鐃緒申鐃緒申側鐃緒申擇鐃緒申辰鐃緒申任鐃緒申腓�鐃緒申鐃緒申鐃緒申任癲∧ｏ申鐃緒申鐃� Googler 鐃緒申鐃緒申鐃緒申寧鐃淑ワ申鐃緒申鐃宿ワ申咼紂種申鐃緒申鐃緒申鐃緒申箸鐃緒申鐃緒申里狼鐃緒申鼎雰亳鐃緒申任鐃緒申鐃緒申鐃緒申屬鐃緒申箸呂鐃獣とわ申鐃緒申鐃緒申廚噺鐃緒申錣削申鐃緒申埜鐃殉でワ申咼紂種申鐃緒申佞鐃緒申鐃獣てわ申鐃獣て器申鐃春わ申鐃銃わ申鐃殉わ申鐃緒申
