Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

I spent all of this week at O’Reilly Velocity EU London. I gave a tutorial, a talk and generally networked with attendees (besides my normal evangelical duties). I’ll write some thoughts on it later (probably in a couple of weeks, as Open Source Summit Europe happens next week – and Percona has a booth there).

This will be a quick, short post.

Releases

A few security releases this past week, with some bug fixes as well:

• …

Percona latest blog poll asks how you currently host applications and databases. Select an option below, or leave a comment to clarify your deployment!

With the increased need for environments that respond more quickly to changing business demands, many enterprises are moving to the cloud and hosted deployments for applications and software in order to offload development and maintenance overhead to a third party. The database is no exception. Businesses are turning to using database as a service (DBaaS) to handle their data needs.

DBaaS provides some obvious benefits:

• Offload physical infrastructure to another vendor. It is the responsibility of whoever is providing the DBaaS service to maintain the physical environment – including hardware, software and best …

Welcome to the first day of the Percona Live Open Source Database Conference Europe 2017: Tutorials day! Technically the first day of the conference, this day focused on provided hands-on tutorials for people interested in learning directly how to use open source tools and technologies.

Today attendees went to training sessions taught by open source database experts and got first-hand experience configuring, working with, and experimenting with various open source technologies and software.

The first full day (which includes opening keynote speakers and breakout sessions) starts Tuesday 9/26 at 9:15 am.

Some of the tutorial topics covered today were:

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Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Percona Live Europe Dublin

Are you affected by the Ryanair flight cancellations? Have you made alternative arrangements? Have you registered for the community dinner? Even speakers have to register, so this is a separate ticket cost! There will be fun lightning talks in addition to food and drink.

You are, of course, already registered for Percona Live Europe Dublin, …

Join Percona’s CTO Vadim Tkachenko @VadimTk and Altinity’s Co-Founder, Alexander Zaitsev as they present Supercharge Your Analytics with ClickHouse on Thursday, September 14, 2017, at 10:00 am PDT / 1:00 pm EDT (UTC-7).

Reserve Your Spot

ClickHouse is a real-time analytical database system. Even though they’re only celebrating one year as open source software, it has already proved itself ready for serious …

In this post, we will discuss how to fix cardinality for InnoDB tables manually.

As a support engineer, I often see situations when the cardinality of a table is not correct. When InnoDB calculates the cardinality of an index, it does not scan the full table by default. Instead it looks at random pages, as determined by options innodb_stats_sample_pages, innodb_stats_transient_sample_pages and innodb_stats_persistent_sample_pages, or …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Percona Live Europe 2017 in Dublin

Have you registered for Percona Live Europe Dublin? We have announced some awesome keynotes, and our sponsor list is growing (and we’re always looking for more!).

There will also be a community dinner (Tuesday, September …

Join Percona’s Product Manager, Michael Coburn as he presents Using Percona Monitoring and Management to Troubleshoot MySQL Performance Issues on Thursday, September 7, 2017, at 10:00 am PDT / 1:00 pm EDT (UTC-7).

Reserve Your Spot

Successful applications often become limited by MySQL performance. Michael will show you how to get great MySQL performance using Percona Monitoring and Management (PMM). There will be a demonstration of how to leverage the combination of the …

Welcome to the second day of the Percona Live Open Source Database Conference 2017, and the second set of Percona Live keynotes! It’s a bit rainy outside today, but that isn’t bothering the Percona Live attendees (we’re all indoors learning about new open source technologies)!

Day two of the conference kicked off with another four keynote talks, all of which discussed issues and technologies that are addressed by open source solutions:

The Open Source Database Business Model is Under Siege

Paul Dix (InfluxData)

Paul Dix’s keynote may have ruffled a few feathers, as he looked at possible futures for the open …

In this blog, we’ll look at how to achieve better-than-linear scaling.

Scalability is the capability of a system, network or process to handle a growing amount of work, or its potential to be enlarged to accommodate that growth. For example, we consider a system scalable if it is capable of increasing its total output under an increased load when resources (typically hardware) are added: https://en.wikipedia.org/wiki/Scalability.

It is often accepted as a fact that systems (in particular databases) can’t scale better than linearly. By this I mean when you double resources, the expected performance doubles, at best (and often is less than doubled).  

We can attribute this assumption to Amdahl’s law (https://en.wikipedia.org/wiki/Amdahl%27s_law), and later …