Posts tagged mysql
Review: MySQL for Python by Albert Lu...
Packt Publishing recently sent me a copy of MySQL for Python to review and after reading through the book I must say that I’m rather impressed at the variety of topics that the book covers.
It starts off with the basics of setting up MySQL for your testing/development needs by going over several of the common installation and configu [...]
Simple Python: a job queue with threa...
Every so often you need to use a queue to manage operations in an application. Python makes this very simple. Python also, as I’ve written about before, makes threading very easy to work with. So in this quick program I’ll describe via comments, how to make a simple queue where each job is processed by a thread. Integrating this [...]
A simple load test script in Python
Lately I’ve had to do some environment load testing so I wrote this quick script. It can be modified as needed but the basic idea is that it spawns $x threads (–threads) and then sends two connections (or however many you want with –per-connection=) per thread to the URL (–url=). You can have it wait a configurable t [...]
MySQL analytics: information_schema p...
If you’ve ever needed to know how the data and index percentages per table engine were laid out on your MySQL server, but didn’t have the time to write out a query… here it is!
select
(select (sum(DATA_LENGTH)+sum(INDEX_LENGTH))/(POW(1024,3)) as total_size from tables) as total_size_gb,
(select sum(INDEX_LENGTH)/(POW(1024 [...]
Easy MySQL: transaction isolation and...
Clients often ask what the differences are between the various InnoDB isolation levels, or what ACID means. Here are some simple explanations for those that have not yet read the manual and committed it to memory.
READ UNCOMMITTED
Every select operates without locks so you don’t get consistency and might have dirt reads, which are pot [...]
Easy Python: multi-threading MySQL qu...
There are many times when writing an application that single threaded database operations are simply too slow. In these cases it’s a matter of course that you’ll use multi-threading or forking to spawn secondary processes to handle the database actions. In this simple example for Python multi-threading you’ll see the how s [...]
Easy Python: display LVM details in X...
If you need to work with LVM in your scripts but haven’t found a good method to access details about Logical Volume Groups, here’s a simple Python script that will print the details about any volumes on your system. This could be useful for writing a partition check script for your MySQL data directory (if you’re not using [...]
Easy MySQL: how to backup databases t...
Here’s a simple answer to a simple question. “How do I run a backup of MySQL to another machine without writing to the local server’s filesystem?” – this is especially useful if you are running out of space on the local server and cannot write a temporary file to the filesystem during backups.
Method one ̵ [...]
How to: rotate wordpress posts into h...
If you’re using the new Arthemia theme for WordPress you might notice that there are two areas of the theme that can have articles promoted to; namely Headline and Featured sections. This is controlled by category association. Basically you have a post and if you want it in the Headline area of the theme you attach the category “ [...]
N900 – control all of your acco...
If you own a Nokia N900 cellular device you might be interested in the ability to control all of your IM accounts from the command line. For those that do not know, the N900 runs Maemo Linux and is capable of running MySQL embedded if you so choose. Here’s a quick script I wrote to provide that functionality for IM accounts. It’ [...]
