1. 程式人生 > >The Auto-extending innodb_system data file './ibdata1' is of a different size 6400 pages (rounded do

The Auto-extending innodb_system data file './ibdata1' is of a different size 6400 pages (rounded do

Mark一個解決的問題:

ibadat1 是 共享表空間檔案,在使用資料庫時,會自動增大

包含:

  • Data dictionary  
  • Double write buffer 
  • Insert buffer
  • Rollback segments
  • UNDO space
  • Foreign key constraint system tables

(前幾個東東和innodb引擎寫資料、回滾等流程有關)

mysql資料庫每頁資料 16K, 由於初始化資料庫時,已經使用了 12M ,我在使用 my.cnf啟動時,

設定了 100M = 16K*6400頁,因此報錯,調整成 12M 可以正常啟動

innodb_data_file_path = ibdata1:12M:autoextend

未解決問題: 雖然說ibdata1 資料檔案 mysql會自動增大,但自動擴充套件在高併發時,是否會造成效能消耗?有多少影響?本人並不清楚,希望有路過的大神提點一下

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