I had the chance to work on an interesting case last week, and I thought I’d share what I think is a little known goodie from Percona Toolkit for MySQL called pt-query-digest.

One customer was suffering from periods of high load on their database server, leading to degraded application performance, and sometimes even short moments of downtime. As usual with these cases, we set up pt-stalk to trigger a capture if Threads_running went above a known ‘good’ value for this workload, so we would have lots of diagnostics information to review even if we couldn’t be logged in to the server at the time the problem happened.

As I began reviewing …

One of the first things we do when preparing a client’s infrastructure for Galera deployment is see whether their schema is suitable.

• Avoiding quirks and edge cases, we can say that Galera simply requires all tables to be InnoDB and also have a PRIMARY KEY (obviously having a PK in InnoDB is important anyway, for InnoDB-internal reasons).
• We want to know about FULLTEXT indexes. With recent InnoDB versions also supporting FULLTEXT we need to check not just whether a table has such an index, but actually which engine it is.
• Spatial indexes. While both InnoDB and MyISAM can deal with spatial datatypes (POINT, GEOMETRY, etc), only MyISAM has the spatial indexes.

Naturally, checking a schema in the server is more effective than going through other sources and possibly missing bits. On the downside, the only viable way to get this info out of MariaDB is INFORMATION_SCHEMA, but because of the way …

We’re ironing out a kink that’s preventing Planet MySQL from aggregating VividCortex’s blog feed, so while that’s in progress, I’ll post a quick note on what we’re up to at VividCortex, for the Planet MySQL readers. VividCortex is a monitoring and analysis product for MySQL, provided as Software-As-A-Service, with agents that run in your systems and report back to our APIs. The agents are super-efficient and non-obtrusive (you’ve probably noticed my posts about Go recently).

Hey you!

As said in the part 1 of this article, I will be covering here:

• How to create a openconnect init script

So, concerning the init script I will be posting parts of the script first, and then will put a link for download at the end.

First of all, we need the shebang (#!/bin/bash) and then global variables that will be used along the script:

# Path variables
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

# VPN Variables
IFACE="sslvpn"
VPN_USER="vpn_user"
VPN_HOST="sslvpn.yourdomain.com"
VPN_PASS="vpn_password"
PID="/var/run/openconnect.pid"
TEMP_LOG="/tmp/status.txt"
INFO="Usage: $(basename "$0") (start|stop|status|restart)"

You can also define most of these options in a …

This is a nice blog post from Asher Feldman, Site Architect, Wikipedia on how Wikipedia Adopts MariaDB. If you’re using English or German Wikipedia, or using Wikidata, you’re currently being served by MariaDB 5.5.

3Ci processes over a billion transactions a month. More than 100 million unique U.S. consumers have engaged with a business through our platform. All that activity creates massive amounts of data. The Data Team at 3Ci is responsible for keeping our offerings running at optimal performance and for making sense of our data. They manage MySQL [...] …

If you are a MySQL support customer, the recent release of My Oracle Support (MOS) 6.5 has some features which may interest you (if you’re not a customer, this post likely won’t interest you). MOS 6.5 was introduced on 06 April, and with it came the ability to opt in to receive service request (SR) update details via email. This was a feature some MySQL Support customers missed after the migration to MOS. Thanks to feedback from MySQL Support customers and others with similar needs, this feature has now been implemented. Because email is an inherently insecure delivery mechanism, not all customers will wan this, and the feature requires customers to explicitly opt in before SR update content is sent via email.  Coupled with the MOS Mobile interface, Support customers have a number of flexible ways to access and manage SRs.

The second major enhancement is the ability to …

Percona is glad to announce the release of Percona XtraBackup 2.1.0 for MySQL beta on April 22, 2013. Downloads are available from our download site here. For this BETA release, we will not be making APT and YUM repositories available, just base deb and RPM packages

This is an BETA quality release and is not intended for production. If you want a high quality, generally available release, the current stable version should be used (currently 2.0.6 in the 2.0 series at the time of writing).

This release contains all of the features and bug fixes in …

Even frequent visitors to bugs.mysql.com can sometimes miss the little note in the bottom right corner of each page:

Page generated in 0.017 sec. using MySQL 5.6.11-enterprise-commercial-advanced-log

That text changed this past weekend, going from MySQL Enterprise 5.6.10 to 5.6.11.  But more importantly, the collection of MyISAM tables which support the bugs system were also converted to InnoDB.  There’s a little story to tell here about eating this particular helping of dogfood which also amplifies changelog comments, so here it is:

We like to keep bugs.mysql.com on a current release of MySQL, and we started looking to upgrade from 5.5.27 shortly after GA.  In doing so, …

MySQL replication enables data to be replicated from one MySQL database server (the master) to one or more MySQL database servers (the slaves). However, imagine the number of use cases being served if the slave (to which data is replicated) isn't restricted to be a MySQL server; but it can be any other database server or platform with replication events applied in real-time! 
This is what the new Hadoop Applier empowers you to do.
An example of such a slave could be a data warehouse system such as Apache Hive, which uses HDFS as a data store. If you have a Hive metastore associated with HDFS(Hadoop Distributed File System), the Hadoop Applier can populate Hive tables in real time. Data is …