Tagged Questions
1
vote
1answer
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How does mysql deal with queries that touches myisam and innodb tables?
In our mysql database, we use both myisam and innodb tables, though there are more myisam tables.
QUESTIONS
If a query involves both myisam and innodb tables, will the query use table lock or row ...
2
votes
1answer
243 views
inner join on PK with extra criteria slow despite indices?
Given the two tables below I am struggling to understand:
why is the third query slow even though first two queries are fast
what exactly is EXPLAIN saying
can I do anything to significantly speed ...
2
votes
1answer
360 views
MySQL 5.5.8 InnoDB Foreign Key, JOIN performance
We are using aws/rds, MySQL 5.5.8. all InnoDB.
For performance purposes, we have merged some data-elements into varchar fields; mini-sized int and date type fields; added covering indexes; ...
