Really Large Queries: Advanced Optimization Techniques: Wednesday, February 27, 2013 10 a.m. PST
Do you have a query you never dared to touch?
Do you know it’s bad, but it’s needed?
Does it fit your screen?
Does it really have to be that expensive?
Do you want to do something about it?
During the next Percona webinar on February 27, I will present some techniques that can be useful when troubleshooting such queries. We will go through case studies (each case study is made from multiple real-world cases). In these cases we were often able to reduce query execution time from 10s of seconds to a fraction of a second.
More info:
Imagine a query that barely fits your monitor screen such as a 7 table join. In this webinar, we will discuss filling the gap between reading explain output and optimizing really large queries. Practical techniques used to address real-world situations will be shared, while pointing out common mistakes organizations often make. The talk will cover topics including:
• How to start optimizing large queries
• The use of denormalization
• The effect of join order
Interested? Register here.
Peter,
Can you have a look at this: http://stackoverflow.com/questions/15619755/why-would-adding-a-duplicate-index-make-mysql-use-the-correct-index-not-the-dup
Hi Tony,
You can also post this to our MySQL discussion forums http://www.perconaforum.com/index.php?t=thread&frm_id=10&
I’ll be adding a general MySQL category in a few weeks but in the meantime this would be the best place to post it.