Use Firebug with FirePHP to analyze the SQL queries made by WordPress. Ideal for development and avoid performance issues.
Manages your WordPress database.
The Plugin Debug Objects provides a large number of information: query, cache, cron, constants, hooks, functions and many more.
View debugging and performance information on database queries, hooks, conditionals, HTTP requests, redirects and more.
Plugin shows in the admin bar the number of SQL queries, the amount of time in seconds and memory load.
Adminer is a full-featured MySQL management tool written in PHP. This plugin include this tool in WordPress.
Helper plugin that provides conditional functions for detecting a variety of mobile devices & tablets. Perfect accompaniment to CSS Media Queries.
Quickly shows the template used for current page, number of queries, and execution time for PHP code.
List query-actions only for admins; for debug purposes
Admin-only tool for checking execution times and error output of current theme/plugins
Extreme Advanced debugging plugin for seeing the verbose of the verbose debug info. Tech Support, Server Admins, WordPress Developers, Plugin Develop
Monitor Scripts, Styles, Queries, and more during Development
Displays information on both front and back ends during development, such as memory usage, number of database queries and more.
Connect your google webmaster tools to your admin area.
Outputs some database query information on page load for logged in admins. Output is located as an html comment in the footer and also in the console.
Caches multiple users automatically on post and comment pages to radically reduce mysql queries for plugins that get_userdata.
Allows users to set normally private query vars through GET, POST or cookies. For exapmle, exclude posts from a specific category.
Displays a list of each page's SQL queries and the functions calling them that can be searched and sorted by time, type, etc.
Shortcode to count number of posts that match a given set of criteria; provides link to query to display list of matching posts
Takes incoming queries from search engines and adds these queries as tags to that post.
Cloud-O-Google Queries is a filter to display keyword clouds based on search engine queries.
Used to profile MySQL queries for performance; with backtrace information for each query (caller functions, lines, file names etc.)
This plugin will give you the total number of queries to the db per page, as well as the total time it took to render those queries out to the page.
Adds information about the loop query and custom queries in the frontend