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MYSQL Architecture and Parameters

Philip Zhong

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Oracle Architecture

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MYSQL Architecture

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Comparing Different Storage Engines

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INNODB Architecture

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INNODB Architecture

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System Table space Internal Data Dictionary

Undo

Insert Buffer

Doublewrite Buffer

MySQL Replication Info

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INNODB Transaction Isolation Levels

• READ UNCOMMITED - Rarely used, can use if you are fine with dirty reads but performance improvement is limited

• READ COMMITED – Results of all committed transactions become visible to the next statement. May be more efficient than higher isolation levels. Allows old versions to be purged faster

• REPEATABLE READ – Default. Reads within transactions are fully repeatable, no phantom rows

• SERIALIZABLE - Makes all selects locking selects, avoid when possible

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INNODB Parameters

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My.cnf

My_temp.txt

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Thank you.