voicefromoldsoul blogspot.com

Voice from An Old Soul

Voice from An Old Soul. 決定MySQL Cluster 的效能的因素 - 在韓國的PoC的經驗談. 過年前一星期去了趟韓國協助那裡的同事為當地的大客戶做MySQL Cluster PoC它的情境是一自個現有跑在另一個資料庫的應用系統移植過來測試的環境架了一個有4個data node, 3個SQL node的MySQL Cluster原有的應用系統有許多複雜的SQL命令有derive tablejoin的base table和derrived 達62個也有的table有text格式的欄位這兩點是我比較擔心的果然執行這些SQL命令所需要的時間由0.x秒增加到5 6秒而導入3萬多行到一個有text欄位的table需要2 3個小時為此檢查這些SQL命令發現其中有些重複的join甚至還有些會産生cartesian product經過以下的調優使PoC獲得還不錯的結果. 在SQL node使用thread pool plugin 在my.cnf設plugin-loadthread pool.so. 透過MySQL的SQL MODE參數可以影響MySQL的行.
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Voice from An Old Soul

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Voice from An Old Soul. 決定MySQL Cluster 的效能的因素 - 在韓國的PoC的經驗談. 過年前一星期去了趟韓國協助那裡的同事為當地的大客戶做MySQL Cluster PoC它的情境是一自個現有跑在另一個資料庫的應用系統移植過來測試的環境架了一個有4個data node, 3個SQL node的MySQL Cluster原有的應用系統有許多複雜的SQL命令有derive tablejoin的base table和derrived 達62個也有的table有text格式的欄位這兩點是我比較擔心的果然執行這些SQL命令所需要的時間由0.x秒增加到5 6秒而導入3萬多行到一個有text欄位的table需要2 3個小時為此檢查這些SQL命令發現其中有些重複的join甚至還有些會産生cartesian product經過以下的調優使PoC獲得還不錯的結果. 在SQL node使用thread pool plugin 在my.cnf設plugin-loadthread pool.so. 透過MySQL的SQL MODE參數可以影響MySQL的行.

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This web page voicefromoldsoul.blogspot.com states the following, "決定MySQL Cluster 的效能的因素 - 在韓國的PoC的經驗談." We saw that the webpage said " 過年前一星期去了趟韓國協助那裡的同事為當地的大客戶做MySQL Cluster PoC它的情境是一自個現有跑在另一個資料庫的應用系統移植過來測試的環境架了一個有4個data node, 3個SQL node的MySQL Cluster原有的應用系統有許多複雜的SQL命令有derive tablejoin的base table和derrived 達62個也有的table有text格式的欄位這兩點是我比較擔心的果然執行這些SQL命令所需要的時間由0." It also said " 在SQL node使用thread pool plugin 在my."

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