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MySQL benchmarking: Know your baseline variance!

 | November 26, 2014 |  Posted In: Benchmarks, MySQL

Often enough I find MySQL benchmark results where the difference between results is 1% or even less and some conclusions are drawn. Now it is not that 1% is not important – especially when you’re developing the product you should care about those 1% improvements or regressions because they tend to add up. However with […]

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Percona XtraDB Cluster 5.6.21-25.8 is now available

 | November 25, 2014 |  Posted In: Events and Announcements, MySQL, Percona Software, Percona XtraDB Cluster

Percona is glad to announce the new release of Percona XtraDB Cluster 5.6 on Novmeber 25th 2014. Binaries are available from downloads area or from our software repositories. We’re also happy to announce that Ubuntu 14.10 and CentOS 7 users can download, install, and upgrade Percona XtraDB Cluster 5.6 from Percona’s software repositories. Based on […]

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(More) Secure local passwords in MySQL 5.6 and up

 | November 25, 2014 |  Posted In: MySQL, Security

I log into a lot of different servers running MySQL and one of the first things I do is create a file in my home directory called ‘.my.cnf’ with my credentials to that local mysql instance:

This means I don’t have to type my password in every time, nor am I tempted to include […]

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Percona Server 5.6.21-70.1 is now available

 | November 24, 2014 |  Posted In: Events and Announcements, MySQL, Percona Server, Percona Software

Percona is glad to announce the release of Percona Server 5.6.21-70.1 on November 24, 2014. Download the latest version from the Percona web site or from the Percona Software Repositories. Based on MySQL 5.6.21, including all the bug fixes in it, Percona Server 5.6.21-70.1 is the current GA release in the Percona Server 5.6 series. Percona Server is […]

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Schema changes in MySQL for OpenStack Trove users

 | November 24, 2014 |  Posted In: MySQL, OpenStack

People using OpenStack Trove instances can hit a common issue in the MySQL world: how to perform schema change operations while minimizing the impact on the database server? Let’s explore the options that can allow online schema changes. Summary With MySQL 5.5, pt-online-schema-change from Percona Toolkit is your best option for large tables while regular […]

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Google Compute Engine adds Percona XtraDB Cluster to click-to-deploy process

 | November 21, 2014 |  Posted In: Cloud and MySQL, MySQL, MySQL DBaaS, Percona XtraDB Cluster

I’m happy to announce that Google has added Click-to-deploy functionality for Percona XtraDB Cluster (PXC) on Google Cloud Compute nodes. This gives you the ability to rapidly spin up a cluster for experimentation, performance testing, or even production use on Google Compute Engine virtual machines. What is Percona XtraDB Cluster? Percona XtraDB Cluster is a […]

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Sys Schema for MySQL 5.6 and MySQL 5.7

 | November 20, 2014 |  Posted In: Insight for DBAs, MySQL

Performance Schema (P_S) has been available since MySQL 5.5, more than 4 years ago. It is still difficult to see production servers with P_S enabled, even with MySQL 5.6 where the feature is enabled by default. There have been several complaints like the overhead, that the fix is a work in progress, and the ease […]

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How a set of queries can be killed in MySQL using Percona Toolkit’s pt-kill

 | November 19, 2014 |  Posted In: Insight for DBAs, MySQL, Percona Software, Percona Toolkit

You might have encountered situations where you had to kill some specific select queries that were running for long periods and choking the database. This post will go into more detail with an example of report query offloading. Report query (select) offloading to a slave server is a common practice to reduce the workload of the […]

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Avoiding MySQL ALTER table downtime

 | November 18, 2014 |  Posted In: Insight for DBAs, MySQL, Percona Managed Services, Percona Remote DBA

MySQL table alterations can interrupt production traffic causing bad customer experience or in worst cases, loss of revenue. Not all DBAs, developers, syadmins know MySQL well enough to avoid this pitfall. DBAs usually encounter these kinds of production interruptions when working with upgrade scripts that touch both application and database or if an inexperienced admin/dev […]

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MySQL’s INNODB_METRICS table: How much is the overhead?

 | November 18, 2014 |  Posted In: Benchmarks, InnoDB, MySQL

Starting with MySQL 5.6 there is an INNODB_METRICS table available in INFORMATION_SCHEMA which contains some additional information than provided in the SHOW GLOBAL STATUS output – yet might be more lightweight than PERFORMANCE_SCHEMA. Too bad INNODB_METRICS was designed during the Oracle-Sun split under MySQL leadership and so it covers only InnoDB counters. I think this […]

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