June 19, 2013

Post: Multi Column indexes vs Index Merge

the full row data corresponding to the given index entry. So what choices does MySQL have if you have just 2 separate indexesMySQL picks to use combined index and indeed thewrong of course – it can’t be more than if only index prefix is used. MySQL does

Post: Lost innodb tables, xfs and binary grep

the system and how data was lost: MySQLthe wrong machine (production master) All slaves followed and dropped their copy of the data Thepicking on theWhy? Well, here’s few of thethe right page and so the right index id. The

Post: ANALYZE: MyISAM vs Innodb

INDEX or change the query and report MySQL Optimizer Bug :) But now lets see in thewrong cardinality which shows us index prefix is unique (245900 is estimate for the row count in thethe order of magnitude is enough. Sometimes it is not and you’re thinking why a hell it could be picking