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Using MySQL triggers and views in Amazon RDS

 | July 2, 2014 |  Posted In: Insight for DBAs, MySQL

I recently had an opportunity to migrate a customer from a physical server into Amazon’s RDS environment. In this particular case the customers’ platform makes extensive use of MySQL triggers and views.  I came across two significant issues that prevented me from following Amazon’s documentation, which basically states “use mysqldump” but doesn’t call out a […]

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Here’s my favorite secret MySQL 5.6 feature. What’s yours?

 | September 5, 2013 |  Posted In: MySQL

MySQL 5.6 has a great many new features, including, but certainly not limited to a number of performance improvements. However, besides the widely talked-about features such as InnoDB support for full text search, optimizer, performance schema improvements and GTID, there are also a few tiny improvements that nobody cared to mention. One such feature is…

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MySQL Partitioning – can save you or kill you

 | December 11, 2010 |  Posted In: Insight for DBAs, MySQL

I wanted for a while to write about using MySQL Partitioning for Performance Optimization and I just got a relevant customer case to illustrate it. First you need to understand how partitions work internally. Partitions are on the low level are separate table. This means when you’re doing lookup by partitioned key you will look […]

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Getting History of Table Sizes in MySQL

 | December 8, 2010 |  Posted In: Insight for DBAs, MySQL

One data point which is very helpful but surprisingly few people have is the history of the table sizes. Projection of data growth is very important component for capacity planning and simply watching the growth of space used on partition is not very helpful. Now as MySQL 5.0+ has information schema collecting and keeping this […]

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Replication of MEMORY (HEAP) Tables

 | October 15, 2010 |  Posted In: Insight for DBAs, MySQL

Some Applications need to store some transient data which is frequently regenerated and MEMORY table look like a very good match for this sort of tasks. Unfortunately this will bite when you will be looking to add Replication to your environment as MEMORY tables do not play well with replication.

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The story of one MySQL Upgrade

 | October 8, 2010 |  Posted In: Insight for DBAs, MySQL

I recently worked on upgrading MySQL from one of very early MySQL 5.0 versions to Percona Server 5.1. This was a classical upgrade scenario which can cause surprises. Master and few slaves need to be upgraded. It is a shared database used by tons of applications written by many people over more than 5 years […]

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Cache Miss Storm

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

I worked on the problem recently which showed itself as rather low MySQL load (probably 5% CPU usage and close to zero IO) would spike to have hundreds instances of threads running at the same time, causing intense utilization spike and server very unresponsive for anywhere from half a minute to ten minutes until everything […]

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Estimating Replication Capacity

 | July 20, 2010 |  Posted In: Insight for DBAs, MySQL

It is easy for MySQL replication to become bottleneck when Master server is not seriously loaded and the more cores and hard drives the get the larger the difference becomes, as long as replication remains single thread process. At the same time it is a lot easier to optimize your system when your replication runs […]

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