Long before there was the official Query Analyzer (QUAN), a component of MySQL Enterprise, SQL analysis was possible using MySQL Proxy.

The following is an introduction to logging and query analysis with MySQL Proxy.

Get MySQL Proxy

You need to first download MySQL Proxy. In this example I am using the Linux RHEL5 64bit OS and Version 0.7.2

$ wget http://dev.mysql.com/get/Downloads/MySQL-Proxy/mysql-proxy-0.7.2-linux-rhel5-x86-64bit.tar.gz/from/http://mirror.trouble-free.net/mysql_mirror/
$ tar xvfz mysql-proxy-0.7.2-linux-rhel5-x86-64bit.tar.gz
$ ln -s mysql-proxy-0.7.2-linux-rhel5-x86-64bit mysql-proxy
$ export PATH=`pwd`/mysql-proxy/sbin:$PATH
$ mysql-proxy --help-all

Pre-requisites

MySQL Proxy uses TCP/IP, so it is important you connect via the actual …

Finland-based NetHawk today announced it has selected Sun Microsystems’ MySQL Embedded Database Server software in order to meet its stringent requirements for application speed, scalability and 24x7 availability – at half the cost of other databases.

The other day I found a nice surprise on my inbox. Jay Pipes asked me if I'd like to try fixing a small bug on Drizzle. It looked pretty simple, and the bug report included a big part of the fix. I accepted without a doubt.
I decided to first change trans_prealloc_size from uint32_t to uint64_t. That was done on drizzled/session.h. Then, I went to drizzle/set_var.cc and changed sys_trans_prealloc_size from …

I am trying to understand the sources of replication delay on a slave that replicates from a busy master and handles many concurrent clients. Replication delay was growing quickly, so I began making innodb_thread_concurrency smaller until I set it to 2. What else can I do? Each time I install a new binary with a few fixes, the delay picks up as the server uses O_DIRECT and it takes a while to warm the buffer cache.

There are many sources of replication delay. One of them is the enforcement of innodb_thread_concurrency. This limits the number of threads that concurrently run within InnoDB. The replication thread that replays SQL statements is subject to this limit. It does not receive special treatment. When many statements run concurrently, the replication thread may spend too much time waiting in a queue to enter …

Update: As explained in “MySQL Cluster 7.0.7 binaries released” you can now download the compiled binaries for your particular platform. I am going to leave this entry in place as it will hopefully be useful for future releases but for 7.0.7 you should refer to that other post.

You’ll need to wait for the pre-built binaries but you can now download the source code and build it for yourself to get started. This article explains where to get it and how to build, install and test the installation.

In this example, I’ve used Ubuntu.

The first step is to download the compressed tar ball containing the source code by pointing your browser to …

Track your running miles using Apache Wicket, GlassFish, NetBeans, MySQL, and YUI Charts

An earlier blog introduced an application that provides basic tracking of your running distance and generate charts to monitor progress. The idea is to build the same application using different Web frameworks and deploy on GlassFish and then evaluate each framework based upon a pre-defined critieria. The first version was built using JRuby and Ruby-on-Rails. This blog announces the completion of the Apache …

The following is from a clients server:

$ cat /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql

log_slow_queries=/var/lib/mysql/slow-queries.log

# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

max_connections = 600

# myisam options
key_buffer_size = 16M
myisam_sort_buffer_size = 16M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = …

Installing Nginx With PHP5 And MySQL Support On Fedora 11

Nginx (pronounced "engine x") is a free, open-source, high-performance HTTP server. Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption. This tutorial shows how you can install Nginx on a Fedora 11 server with PHP5 support (through FastCGI) and MySQL support.

Couple of days ago, during the training session one of the trainee(experienced in other DBMS) was really curious to know on how to setup & use Scheduled tasks in MySQL. I was also equally interested to spend some time on "Event Scheduler" as I was also getting a chance to show that how MySQL is equipped with the rich features but unfortunately the discussion ended before taking off. Most of the ppl felt its just a matter of one line adding to the crontab  & job is done. So most of users were not aware of the fact that MySQL has added a feature which could do what the Unix crontab  (also known as a “cron job”) or the Windows Task Scheduler can.


MySQL Events are tasks that run according to a schedule due to this can also be referred as scheduled events. When you create an event, you are creating a named database object containing one or more SQL statements to be executed at one or more regular intervals, beginning …

Track your running miles using Apache Wicket, GlassFish, NetBeans, MySQL, and YUI Charts

An earlier blog introduced an application that provides basic tracking of your running distance and generate charts to monitor progress. The idea is to build the same application using different Web frameworks and deploy on GlassFish and then evaluate each framework based upon a pre-defined critieria. The first version was built using JRuby and Ruby-on-Rails. This blog announces the completion of the Apache …