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MYSQL Architecture and Parameters



Philip Zhong



© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   1
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   2
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   3
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   4
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   5
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   6
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   7
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   8
 Internal Data Dictionary

 Undo

 Insert Buffer

 Doublewrite Buffer

 MySQL Replication Info




© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   9
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   10
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   11
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   12
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   13
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   14
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   15
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   16
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   17
• 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


© 2011 Cisco and/or its affiliates. All rights reserved.      Cisco Confidential   18
© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   19
My_temp.txt




© 2011 Cisco and/or its affiliates. All rights reserved.                 Cisco Confidential   20
Thank you.




© 2011 Cisco and/or its affiliates. All rights reserved.   Cisco Confidential   21

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Mysql architecture&parameters

  • 1. MYSQL Architecture and Parameters Philip Zhong © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1
  • 2. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2
  • 3. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3
  • 4. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4
  • 5. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5
  • 6. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6
  • 7. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 7
  • 8. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 8
  • 9.  Internal Data Dictionary  Undo  Insert Buffer  Doublewrite Buffer  MySQL Replication Info © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 9
  • 10. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 10
  • 11. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 11
  • 12. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 12
  • 13. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 13
  • 14. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 14
  • 15. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 15
  • 16. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 16
  • 17. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 17
  • 18. • 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 © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 18
  • 19. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 19
  • 20. My_temp.txt © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 20
  • 21. Thank you. © 2011 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 21