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MySQL caching methods and tips

 | April 4, 2011 |  Posted In: Insight for Developers, MySQL

“The least expensive query is the query you never run.” Data access is expensive for your application. It often requires CPU, network and disk access, all of which can take a lot of time. Using less computing resources, particularly in the cloud, results in decreased overall operational costs, so caches provide real value by avoiding […]

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Sharing an auto_increment value across multiple MySQL tables

 | October 4, 2010 |  Posted In: Benchmarks, Insight for Developers, MySQL

The title is SEO bait – you can’t do it. We’ve seen a few recurring patterns trying to achieve similar – and I thought I would share with you my favorite two: Option #1: Use a table to insert into, and grab the insert_id:

Option #2: Use a table with one just row:

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Instrumentation and the cost of Foreign Keys

 | September 20, 2010 |  Posted In: Insight for Developers, MySQL

I occasionally get in to light arguments healthy discussions with students about whether or not to use Foreign Key constraints on InnoDB tables.  My standard response has always been: “it depends on how much of a tradeoff you are willing to make for performance. In some situations the cost can be considerable”. .. that’s when […]

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UDF -vs- MySQL Stored Function

 | September 6, 2010 |  Posted In: MySQL

Few days ago I was working on a case where we needed to modify a lot of data before pushing it to sphinx – MySQL did not have a function to do the thing so I thought I’ll write MySQL Stored Function and we’ll be good to go. It worked! But not so well really […]

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Why message queues and offline processing are so important

 | August 10, 2010 |  Posted In: Insight for Developers, MySQL

If you read Percona’s whitepaper on Goal-Driven Performance Optimization, you will notice that we define performance using the combination of three separate terms. You really want to read the paper, but let me summarize it here: Response Time – This is the time required to complete a desired task. Throughput – Throughput is measured in […]

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