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Latest articles from our experts:

Tips for avoiding malware from a lesson learned

In a recent article on the Percona blog, I recommended readers to a tool called CamStudio for making technical screen recordings. The blog post was very popular and got 300+ Facebook likes in a short …

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Oracle license revenue and the MySQL ecosystem

Oracle was in the news recently with the story of its license revenue declining as much as 17% in the recent quarter. This is blamed on transitioning to the cloud in some publications, but others, …

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Percona XtraDB Cluster (PXC): How many nodes do yo...

A question I often hear when customers want to set up a production PXC cluster is: “How many nodes should we use?” Three nodes is the most common deployment, but when are more nodes needed? …

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Percona Monitoring Plugins 1.1.5 release

Percona is glad to announce the release of Percona Monitoring Plugins 1.1.5. Changelog: Added more DB instance classes to pmp-check-aws-rds.py (issue 1398911) Added configurable query period and average time to pmp-check-aws-rds.py (issue 1436943) Added region …

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Q&A: High availability when using MySQL in the clo...

Last week I hosted a webinar on using MySQL in the cloud for High Availability (HA) alongside 451 Research analyst Jason Stamper. You can watch the recording and also download the slides (free) here. Just …

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Getting EXPLAIN information from already running q...

When a new version of MySQL is about to be released we read a lot of blog posts about the performance and scalability improvements. That’s good but sometimes we miss some small features that can …

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Update on the InnoDB double-write buffer and EXT4 ...

In a post, written a few months ago, I found that using EXT4 transactions with the “data=journal” mount option, improves the write performance significantly, by 55%, without putting data at risk. Many people commented on …

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Speed up GROUP BY queries with subselects in MySQL

We usually try to avoid subselects because sometimes they force the use of a temporary table and limits the use of indexes. But, when is good to use a subselect? This example was tested over …

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Percona XtraDB Cluster: Quorum and Availability of...

Percona XtraDB Cluster (PXC) has become a popular option to provide high availability for MySQL servers. However many people are still having a hard time understanding what will happen to the cluster when one or …

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Percona Live Europe 2015! Call for speakers; regis...

Percona Live is moving from London to Amsterdam this year and the event is also expanding to three full days. Percona Live Europe 2015, September 21-23, will be at the Mövenpick Hotel Amsterdam City Centre. …

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InnoDB Posts

Using Cgroups to Limit MySQL and MongoDB memory us...

Quite often, especially for benchmarks, I am trying to limit available memory for a database server (usually for MySQL, but recently for MongoDB also). This is usually needed to test database performance in scenarios with …

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Update on the InnoDB double-write buffer and EXT4 ...

In a post, written a few months ago, I found that using EXT4 transactions with the “data=journal” mount option, improves the write performance significantly, by 55%, without putting data at risk. Many people commented on …

Read More
 


Insight for DBAs Posts

MySQL is crashing: a support engineer's point of v...

In MySQL QA Episode #12, “MySQL is Crashing, now what?,” Roel demonstrated how to collect crash-related information that will help Percona discover what the issue is that you are experiencing, and fix it. As a Support …

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MySQL Quality Assurance: A Vision for the Future b...

Welcome to the final – but most important – episode in the MySQL QA Series. In it, I present my vision for all MySQL Quality Assurance – for all distributions – worldwide. Episode 13: A Better …

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