1. install Cmake

wget  http://www.cmake.org/files/v2.8/cmake-2.8.10.1.tar.gz
tar xvfz cmake-2.8.10.1.tar.gz
cd cmake-2.8.10.1/
./configure
gmake -j3


2. install libaio

gmake -wget  http://www.kernel.org/pub/linux/kernel/people/bcrl/aio/libaio-0.3.92.tar.gz
tar xvfz libaio-0.3.92.tar.gz
cd libaio-0.3.92/
make prefix=/usr/
make prefix=/usr/ installj3 install

3. install MariaDB 5.5.28
go to https://downloads.mariadb.org/mariadb/5.5.28/ OR

wget https://downloads.mariadb.org/f/mariadb-5.5.28/kvm-tarbake-jaunty-x86/mariadb-5.5.28.tar.gz/from/http:/mariadb.ulak.net.tr/
tar xvf mariadb-5.5.28.tar.gz
cd mariadb-5.5.28/

the build will fail :

root@bubu:[Tue Nov 27 10:15:45]:[/opt/installs/mariadb-5.5.28]$ ./BUILD/compile-pentium-max
testing pentium3 ... ok
+++ /bin/rm -rf configure
+++ /bin/rm -rf CMakeCache.txt …

If you’ve ever used non-opensource code, or applications that you don’t have complete control over, then you may have run into situations you need to alter data on a per-row basis but been unable to do so for lack of application SQL access. The solution to this type of problem is to use a MySQL TRIGGER, which allows us to execute arbitrary SQL commands when defined events occur. Why is this useful and how does it work? Well…

For example, I have a freeRADIUS server that uses MySQL as a backend for the user authentication, and one of my server applications (HostBill) provides a freeRADIUS plugin that allows my users to manage their RADIUS accounts; however the default freeRADIUS schema lacks a DATETIME column on the user table. When a user is created (INSERT) or has their password changed (UPDATE) I have no row data that tells me the dates when these operations were issued. Typically this would be a trivial change: issue an ALTER TABLE …

If you're planning to attend UKOUG in Birmingham on Dec 3-5, here's your guide to know more about Oracle's MySQL.

There's a MySQL stream on Monday 5th and we've a great list of sessions, including:

• Rich Mason's keynote on how to Deploy, Scale and Save with Linux, Virtualization and MySQL
• Keith Hollman on stage to discuss how to Embrace Database Diversity
• Mark Swarbrick's lecture on Tips & Tricks for MySQL …

Since the latest changes made recently within InnoDB code (MySQL 5.6) to improve OLTP Read-Only performance + support of full text search (FTS), I was curious to compare it now with MyISAM..

While there was no doubt that using MyISAM as a storage engine for a heavy RW workloads may become very quickly problematic due its table locking on write design, the Read-Only workloads were still remaining favorable for MyISAM due it's extreme simplicity in data management (no transaction read views overhead, etc.), and specially when FTS was required, where MyISAM until now was the only MySQL engine capable to cover this need.. But then FTS came into InnoDB, and the open question for me is now: is there still any reason to use MyISAM for RO OLTP or FTS wokloads from performance point of view, or InnoDB may now cover this stuff as well..

For my test I will use:

• Sysbench for OLTP RO workloads
…

Last month Ubuntu 12.10 was released and we tried to install MySQL Workbench on it. So we went to http://www.mysql.com/downloads/workbench/ and downloaded the .deb file for the most recent Workbench version (5.2.44 as of this writing). We then opened the .deb file with the Ubuntu Software Center application and tried to install it. Unfortunately the following message appeared:

Dependency is not satisfiable: libctemplate0

The problem here is that the libctemplate package provided by Ubuntu 12.10 corresponds to a higher version (libctemplate2). Installing this version instead wouldn’t work since MySQL Workbench is linked against the older one. We’ll handle this dependency issue in future releases, but here’s a workaround:

Download the …

Remote MySQL Performance and Query Monitoring

There may be the situation that you have to monitor a MySQL server remotely. There are some linux tools to do performance and query monitoring locally, and these tools can also used to monitor remotely - but only unencrypted ! Also often MySQL is only listening on the loopback interface, so it is even not reachable remotely over the net (which is very good seen from the security viewpoint). But there is an easy solution in the Linux world.

Woooo, just wrapped up another night of #DBHangOps, check out the video:

For those of you who aren’t familiar with this awesome series of videos, it’s a bi-weekly meeting of MySQL DBAs via a Google Hangout to simply talk about databases (specifically MySQL). The discussions range anywhere from silly stories to awesome learnings and even little gotchas to know about when working with MySQL operationally. If you’re interested in catching when the next #DBHangops will happen, check MySQL planet for a blog post about it, or check this twitter search.

We look forward to talking with you!

This post is the following part #2 of the previous one - in fact Vadim's comments bring me in some doubts about the possible radical difference in implementation of AIO vs normal I/O in Linux and filesystems. As well I've never used Sysbench for I/O testing until now, and was curious to see it in action. From the previous tests the main suspect point was about random writes (Wrnd) performance on a single data file, so I'm focusing only on this case within the following tests. On XFS performance issues started since 16 concurrent IO write processes, so I'm limiting the test cases only to 1, 2, 4, 8 and 16 concurrent write threads (Sysbench is multi-threaded), and for AIO writes seems 2 or 4 write threads may be more than enough as each thread by default is managing 128 AIO write requests..

Few words about Sysbench …

I write a fair number of scripts on this site and have posted a lot of code over the years. Generally if I am not pasting the code to be viewed on the webpage then I link to a file that a user can download; which leads to a lot of mish-mash code that doesn’t have a home. I’ve always kept the code files in a private SVN repo over the years but have recently moved them all to BitBucket Git repositories. So here they are: lots of code samples and useful bits of programming to save time.

Generic Shell Scripts: https://bitbucket.org/themattreid/generic-bash-scripts/src
Generic Python Scripts: https://bitbucket.org/themattreid/generic-python-scripts/src
Generic MySQL Stored Procs: …

This Week in Website Performance is a weekly feature of the Monitis.com blog. It summarizes recent articles about website performance. Why? Because your friends at Monitis.com care.

NoSQL or Traditional Database: From an APM Perspective There Isn’t Really Much Difference

Author: Michael Kopp.

If your application is executing more statements or downloading more data than is necessary, no amount of backend tuning will have your site running at the highest level of performance. This article serves as a reminder that the application accessing the data can be …