# MySQL Version upgrade

**URL:** <https://forums.percona.com/t/mysql-version-upgrade/4622>\
**Category:** General Questions\
**Created:** [December 22, 2015, 3:34am UTC](https://forums.percona.com/t/mysql-version-upgrade/4622 "2015-12-22T03:34:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![purvvv](https://avatars.discourse-cdn.com/v4/letter/p/4bbf92/32.png) [@purvvv](https://forums.percona.com/u/purvvv)\
**Post date:** [December 22, 2015, 3:34am UTC](https://forums.percona.com/t/mysql-version-upgrade/4622/1 "2015-12-22T03:34:12Z")

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Hello all,  
Recently i have changed the MySQL version from 5.2 to 5.6.26, but i am facing some I/O issues. In 5.6 the disk I/O has increase tremendously.  
70% of my tables are of MyISAM and rest InnoDB. I have 2 GB of RAM, and Compact Flash of 30GB to Work with. Can anyone help me in reducing the IO and tell me the right configuration.

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**Author:** ![mirfan](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/mirfan/32/16890_2.png) [@mirfan](https://forums.percona.com/u/mirfan)\
**Post date:** [April 1, 2017, 2:42am UTC](https://forums.percona.com/t/mysql-version-upgrade/4622/2 "2017-04-01T02:42:10Z")

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Can you post pt-summary / pt-mysql-summary outputs to review your existing configuration ? As this would help to advise proper configuration tuning.