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  • Archive for the Debugging Category


    A Practical SPEED-UP Story for Large MySQL Installation

    Published June 10th, 2010

    Background
    One of our customer runs a large (in our camp at least) MySQL system with tables exceeding 30-50M records storing online transaction data. They use daily cron job to create data summary from these transaction tables which runs nightly and produces summary data on MEMORY tables for quick access by thousands of other companies to [...]

    Debugging a MySQL Issue with PHP Using XMP instead of PRE

    Published June 26th, 2009

    Recently, I was helping a co-worker debug a MySrQL issue with an old app that started breaking after the dev team switched the app’s textareas to TinyMCE editor.  Typically, for quick-and-dirty debugging sessions that we want to wrap in minutes, we use a simple dumpQuery() function in PHP that prints out any query used in [...]

    Using mytop to Interactively Monitor MySQL Processes

    Published November 8th, 2008

    How to use mytop and ajaxMyTop to monitor mysql processes.

    Using SHOW FULL PROCESSLIST to Debug PHP Query

    Published October 30th, 2008

    How to debug MySQL queries using SHOW FULL PROCESSLIST and a comment trick.