0
votes
0answers
366 views

Error 'Unknown table engine 'InnoDB'' on query. after restarting mysql

I have mysql DB on server S1 (mysql version 5.1.41-3ubuntu12.7-log), i have created master-slave for this DB on server S2 (mysql version 5.1.54-1ubuntu4-log). the DB on S1 was using one data file ...
7
votes
4answers
3k views

Modifying columns of very large mysql tables with little or no downtime

I periodically need to make changes to tables in mysql 5.1, mostly adding columns. Very simple with the alter table command. But my tables have up to 40 million rows now and they are growing fast... ...