Disclaimer: I’m not specially an expert of benchmarking, this post is to compare different options. All comments and advices are welcome.

I’m not telling you anything new, the show processlist command is a fantastic command line tool for instant check.
But what about monitor your databases with this command embedded in a tool?

Just have a look at this graph:

With 5K queries per seconds, how much will be hidden with a show processlist executed every seconds? Probably a lot.
So, I wanted to test which alternatives could be efficient to retrieve all the queries during a time lapse.

Test procedure and configuration

I used sysbench 0.5 (with oltp.lua) to make my tests on different configurations and …

August 6, 2014 By Severalnines

Well over a thousand sessions have been submitted for the OpenStack Summit and two of them includes our good selves! We’ve submitted two talks with partners of ours: 

• ClusterControl: Efficient and reliable MySQL Management, Monitoring, and Troubleshooting for OpenStack HA)
• Deploying Databases for OpenStack

… and would love it if the talks were included in the final agenda. For that to happen, we need a few more of your votes today!

The OpenStack Summit is a five-day conference for developers, users, and …

July 22, 2014 By Severalnines

We just wanted to make it official: Severalnines ClusterControl now supports MariaDB 10!

As most of you know will know by now, MariaDB 10 is the newest and most advanced version of the popular MariaDB relational database system. Whilst remaining application-compatible with the MySQL database, it adds many new capabilities to address the most challenging web and enterprise application use cases. Cluster deployments would be based on MariaDB Galera Cluster 10, which is a complete merge of MariaDB 10.0.12 and Galera Cluster. 

ClusterControl for MariaDB Clusters

ClusterControl gives you the power to deploy, manage, monitor and scale entire MariaDB Galera clusters efficiently and …

Now it’s time to setup proper monitoring to avoid unpleasant surprises in future.

There are two major problems the monitoring solves: alerting and trending. Alerting is to notify a responsible person about some major event like service stopped working. Trending is to track the change of something over time – disk or memory usage over time, replication lag etc.

This post will be about alerting with Nagios.

The major problem with most of Nagios setups I’ve seen is excessive amount of false positives. This kills whole idea of monitoring. The matter is when an admin gets a false alert they tend to mute it, explicitly or implicitly. They either filter alerts out or don’t treat them seriously. In general case the alert must be worth to wake up the admin in the middle of the night. If the alert isn’t worth as much the real problem will be ignored sooner or …

Amazon micro instances is the great start option for small websites. Learn how to contain oom-killer that may make wrong decision.

oom-killer as MySQL vs Apache arbiter

When it comes to competition for memory oom-killer steps in. I run Apache and MySQL on the same box. This you should probably never do, but I thought that on my tiny setup they will get along. That’s not true. It started when first users came in. The system ran quickly out of memory:

Feb  5 03:48:26 app-01 kernel: [3313052.688189] httpd invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
Feb  5 03:48:26 app-01 kernel: [3313052.688203] httpd cpuset=/ mems_allowed=0
Feb  5 03:48:26 app-01 kernel: [3313052.688208] Pid: 21297, comm: httpd Not tainted 3.4.73-64.112.amzn1.x86_64 #1
Feb  5 03:48:26 app-01 kernel: [3313052.688214] Call Trace:
Feb  5 03:48:26 app-01 kernel: [3313052.688226]  [] dump_header.constprop.6+0x7e/0x1b0
Feb  5 03:48:26 app-01 …

GUI monitoring tools for MySQL are not always suitable for all our needs or situations. Most of them are designed to provide historical views into what happens to our database over time rather then real-time insight into current MySQL server status. Excellent free tools for this include Cacti, Zabbix, Ganglia, Nagios, etc. But each of them needs to be properly configured to provide details on what is going on in our MySQL instances. And setting up one of these monitoring solutions is neither quick nor trivial (well, maybe with the exception of Ganglia).

MySQL Workbench provides …

Here are 3 recent ' oops... wish I hadn't done that :/ ' mistakes I've made since joining moz that you might as well avoid (I'm sure there will be more, but they better not be the same)

Reviewing config files for MySQL, but not all of the defaults 

    We recently migrated a few MySQL databases to a new datacenter, and took advantage of the migration to upgrade the MySQL version(s) at the

Today, just like many times before, I needed to configure a monitoring server for MySQL using Cacti and awesome Percona Monitoring Templates. The only difference was that this time I wanted to get it to run with 1 min resolution (using ganglia and graphite, both with 10 sec resolution, for all the rest of our monitoring in Swiftype really spoiled me!). And that’s where the usual pain in the ass Cacti configuration gets really amplified by the million things you need to change to make it work. So, this is a short checklist post for those who need to configure a Cacti server with 1 minute resolution and setup Percona Monitoring Plugins on it.

Configuring Cacti for 60-seconds polling

First of all, we need to take a Cacti server, which by default is configured to do polling …

Many application developers would know of New Relic. A SaaS performance and monitoring tool targeted towards your web application monitoring including PHP, Ruby, Java, .Net, Python and Node.

With the release today (June 19, 2013) of the New Relic Platform, custom monitoring of data stores including MySQL are now possible. Try it now free. This link will provide you a free standard account (no cost, no billing details necessary), that enables you to perform application monitoring, server monitoring, MySQL instance monitoring and monitoring of many other products via many plugins.

Over the next few posts I will be discussing some of the design decisions I made for this MySQL plugin. New Relic has certain …

We have had some success with the introduction of Glimpsee last month. Merci !
I would like to thanks all of you who have registered and those who are interested in Glimpsee without even really knowing what’s going on.
It is really important for us to feel enthusiasm about our work, because we work hard to provide a tool that could improve your life.

We hope to offer a public beta release of Glimpsee before the end of the year and many more surprises before. Meanwhile, we would like to offer you an incomplete FAQ about Glimpsee, enjoy :
 

What is Glimpsee?

Glimpsee is a smart dashboard for lazy DBA (devops included) The dashboard provides, as Software-as-a-Service, a new way to view the status …