MySQL

High Performance MySQL

Convert MySQL MyISAM tables to InnoDB

Convert MyISAM to InnoDB for better database performance. In the earlier days of MySQL, the default storage engine for your database tables was “MyISAM”. InnoDB is the engine to use now, and MyISAM is no longer actively developed. Therefore all MySQL optimizations are for InnoDB, and it’s recommended to switch from MyISAM to this InnoDB storage engine for your MySQL database tables. Follow this tutorial on how to convert from MyISAM to InnoDB.

High Performance MySQL

How to flush MySQL query cache from time to time

Flush MySQL query_cache to prevent fragmentation of free query cache memory space. Flushing the query cache with flush query cache does not delete or clear the query cache. You have to use reset query cache to fully clear MySQL’s query cache.

How to: Test MySQL database connectivity in ASP.NET, PHP, ASP

Test MySQL database connectivity in ASP.NET, PHP, ASP; Simple MySQL connection test from your website with ASP.NET, PHP & classic ASP. Whenever you need a MySQL connectivity test from a website or server, it’s handy to have various test scripts nearby. Whether it is because you are setting up a new website or you have just installed a new server and are running your tests.

WordPress wp_options table autoload micro-optimization

The autoload feature loads and caches all autoloaded options, if available, or all options. The default option is to autoload, and over time when the wp_options table grows, this degrades performance. Today I noticed a slow MySQL query coming from a WordPress database (WordPress wp_options table). This made me investigate and to optimize the WordPress wp_options table “autoload” feature.
Learn how to add an index and optimize WordPress’ wp_options table for faster database results.

High Performance MySQL

Check, repair and optimize MySQL tables with mysqlcheck

Check, repair and optimize MySQL tables with mysqlcheck. The mysqlcheck client is a command line table maintenance program for MySQL. Mysqlcheck checks, repairs, optimizes, or analyzes MySQL tables. In this post I’ll show you how to use mysqlcheck to optimize all MySQL tables using a cronjob.

How to compare MD5 and SHA1 hashes in MySQL

Some web scripting languages, such as classic ASP, don’t have native string hashing functions – like MD5 or SHA1. This makes it quite difficult to hash or encrypt user supplied input, and to perform string comparison to compare hashes. Let’s make MySQL do the string comparison and hash calculations for us!

Optimize all MySQL tables with PHP/MySQLi multi_query

PHP script to make your MySQL database smaller, leaner and faster! The PHP MySQLi extension supports multiple queries, which are concatenated by a semicolon, with mysqli->multi_query. We use this to optimize all MySQL tables, in a single multi-query statement. Neat! Optimizing MySQL tables is important to keep tables small and fast. This boosts MySQL, PHP and website performance and we all love that, don’t we?

Security?

Block WordPress comment spammers manually

Learn to block WordPress comment spammers manually. The less spammers hit your WordPress blog, the better your blog performs, is one of my opinions. A second is, the less unnecessary plugins you use on your WordPress blog, the better. So, a little while ago I decided to remove plugins like Stop Spammer Registration Plugin and do its work myself. Here is why & how.

WordPress CMS admin password reset

How to reset your WordPress password? If you’ve lost or forgotten your WordPress admin password, you can easily reset the password. Either use the following MySQL statement to reset your WordPress admin password, or change it through functions.php