Percona Cloud Tools January 2014 status update
Percona Cloud Tools, a new service currently in beta, applies Percona’s MySQL expertise to identify the best opportunities for application performance improvement.The first component of Percona Cloud...
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Analyzing WordPress MySQL queries with Query Analytics
This blog, MySQLPerformanceBlog.com, is powered by WordPress, but we never really looked into what kind of queries to MySQL are used by WordPress. So for couple months we ran a Query Analytics (part of...
View ArticlePERFORMANCE_SCHEMA vs Slow Query Log
A couple of weeks ago, shortly after Vadim wrote about Percona Cloud Tools and using Slow Query Log to capture the data, Mark Leith asked why don’t we just use Performance Schema instead? This is an...
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You spoke, we listened: Percona Cloud Tools accelerates query reviews
The Percona Cloud Tools beta service continues to grow its query analysis capabilities with new features for reviewing queries. These enhancements will:Provide better visibility into the query...
View ArticleHow rows_sent can be more than rows_examined?
When looking at queries that are candidates for optimization I often recommend that people look at rows_sent and rows_examined values as available in the slow query log (as well as some other places)....
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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 ArticleHow to log slow queries on Slave in MySQL 5.0 with pt-query-digest
Working as a Percona Support Engineer, every day we are seeing lots of issues related to MySQL replication. One very common issue is slave lagging. There are many reasons for slave lag but one common...
View ArticleUsing Apache Hadoop and Impala together with MySQL for data analysis
Apache Hadoop is commonly used for data analysis. It is fast for data loads and scalable. In a previous post I showed how to integrate MySQL with Hadoop. In this post I will show how to export a table...
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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...
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Percona Server 5.5.37-35.0 is now available
Percona Server version 5.5.37-35.0Percona is glad to announce the release of Percona Server 5.5.37-35.0 on May 6th, 2014 (Downloads are available here and from the Percona Software Repositories). Based...
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Percona Server 5.6.17-65.0 is now available
Percona Server version 5.6.17-65.0Percona is glad to announce the release of Percona Server 5.6.17-65.0 on May 6th, 2014. Downloads are available here and from the Percona Software Repositories.Based...
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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...
View ArticleUsing MySQL 5.6 Performance Schema in multi-tenant environments
Hosting a shared MySQL instance for your internal or external clients (“multi-tenant”) was always a challenge. Multi-tenants approach or a “schema-per-customer” approach is pretty common nowadays to...
View ArticleGetting to know TokuDB for MySQL
During last April’s Percona Live MySQL Conference and Expo, TokuDB celebrated it’s first full-year as an open source storage engine. I still remember reading the official announcement and the...
View ArticleWhy %util number from iostat is meaningless for MySQL capacity planning
Earlier this month I wrote about vmstat iowait cpu numbers and some of the comments I got were advertising the use of util% as reported by the iostat tool instead. I find this number even more useless...
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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 ArticleClik here to view.
Percona Server 5.5.37-35.0 is now available
Percona Server version 5.5.37-35.0Percona is glad to announce the release of Percona Server 5.5.37-35.0 on May 6th, 2014 (Downloads are available here and from the Percona Software Repositories). Based...
View ArticleClik here to view.
Percona Server 5.6.17-65.0 is now available
Percona Server version 5.6.17-65.0Percona is glad to announce the release of Percona Server 5.6.17-65.0 on May 6th, 2014. Downloads are available here and from the Percona Software Repositories.Based...
View ArticleClik here to view.
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...
View ArticleUsing MySQL 5.6 Performance Schema in multi-tenant environments
Hosting a shared MySQL instance for your internal or external clients (“multi-tenant”) was always a challenge. Multi-tenants approach or a “schema-per-customer” approach is pretty common nowadays to...
View Article