How to monitor ALTER TABLE progress in MySQL
While working on a recent support issue as a Percona Support Engineer, I got one question from a customer asking how to monitor ALTER TABLE progress. Actually, for MySQL 5.5 and prior versions, it’s...
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Percona XtraBackup 2.1.8 is now available
Percona is glad to announce the release of Percona XtraBackup 2.1.8 on March 6th, 2014. Downloads are available from our download site here and Percona Software Repositories.This release is the...
View ArticleNew mydumper 0.6.1 release offers performance and usability features
One of the tasks within Percona Remote DBA is to ensure we have reliable backups with minimal impact. To accomplish this, one of the tools our team uses is called mydumper. We use mydumper for logical...
View ArticleIntroducing backup locks in Percona Server
TL;DR version: The backup locks feature introduced in Percona Server 5.6.16-64.0 is a lightweight alternative to FLUSH TABLES WITH READ LOCK and can be used to take both physical and logical backups...
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Tools and tips for analysis of MySQL’s Slow Query Log
MySQL has a nice feature, slow query log, which allows you to log all queries that exceed a predefined about of time to execute. Peter Zaitsev first wrote about this back in 2006 – there have been a...
View ArticlePercona Server with TokuDB: Packing 15TB into local SSDs
Two weeks ago we released an Alpha release of Percona Server with TokuDB. Right now I am on a final stage of evaluation of TokuDB for using in our project Percona Cloud Tools and it looks promising....
View ArticleNotes from the Newb
Notes from the Newb.I’m relatively new to MySQL having come from the world of embedded micro-databases, and though I’m pretty familiar with a number of database systems, I’ve discovered that I have a...
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A conversation with 5 Facebook MySQL gurus
Facebook, the undisputed king of online social networks, has 1.23 billion monthly active users collectively contributing to an ocean of data-intensive tasks – making the company one of the world’s top...
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Innodb redo log archiving
Percona Server 5.6.11-60.3 introduces a new “log archiving” feature. Percona XtraBackup 2.1.5 supports “apply archived logs.” What does it mean and how it can be used?Percona products propose three...
View ArticleEncrypted and incremental MySQL backups with Percona XtraBackup
We’ve recently received a number of questions on how to implement incremental MySQL backups alongside encryption with Percona XtraBackup. Some users thought it was not initially possible because with...
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How to identify and cure MySQL replication slave lag
Here on the Percona MySQL Support team, we often see issues where a customer is complaining about replication delays – and many times the problem ends up being tied to MySQL replication slave lag. This...
View ArticleRow-based replication, MySQL 5.6 upgrades and temporal data types
Whither your rollback plan?MySQL 5.6 upgrades are in full swing these days and knowing how to safely upgrade from MySQL 5.5 to 5.6 is important. When upgrading a replication environment, it’s important...
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Why ALTER TABLE runs faster on Percona Server 5.5 vs. MySQL 5.5
Some of us Perconians are at OpenStack summit this week in Atlanta. Matt Griffin, our director of product management, tweeted about the turbo-hipster CI talk about their experience of ALTER TABLEs...
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How to improve InnoDB performance by 55% for write-bound loads
During April’s Percona Live MySQL Conference and Expo 2014, I attended a talk on MySQL 5.7 performance an scalability given by Dimitri Kravtchuk, the Oracle MySQL benchmark specialist. He mentioned at...
View ArticleInstalling Percona XtraDB Cluster 5.6 with the Docker open-source engine
In my previous post, I blogged about using Percona Server with Docker and have shown you how fast and easy it was to create a virtual environment with just a few commands.This time I will be showing...
View ArticleSemi-Sync replication performance in MySQL 5.7.4 DMR
I was interested to hear about semi-sync replication improvements in MySQL’s 5.7.4 DMR release and decided to check it out. I previously blogged about poor semi-sync performance and was pretty...
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Location for InnoDB tablespace in MySQL 5.6.6
There is one new feature in MySQL 5.6 that didn’t get the attention it deserved (at least from me ) : “DATA DIRECTORY” for InnoDB tables.This is implemented since MySQL 5.6.6 and can be used only at...
View ArticleHow MySQL ‘queries’ and ‘questions’ are measured
MySQL has status variables “questions” and “queries” which are rather close but also a bit different, making it confusing for many people. The manual describing it might not be very easy to...
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Do not trust vmstat IOwait numbers
I’ve been running a benchmark today on my old test box with conventional hard drives (no raid with BBU) and noticed something unusual in the CPU utilization statistics being reported.The benchmark was...
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Percona Toolkit 2.2.8 is now available
Percona is glad to announce the release of Percona Toolkit 2.2.8 on June 4th, 2014 (Downloads are available here and from the Percona Software Repositories). This release is the current GA (Generally...
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