How to optimise your WordPress database

As your site grows, you add posts and pages, users accounts - your WordPress database will also grow - containing previous versions of posts and pages as well as other 'transient' data. All of this extra weight in the database can slow your site, so it's a good idea to give it a regular clean.

The easiest way to do that is by using the LiteSpeed Database Optimiser - part of the LiteSpeed cache plugin that we strongly recommend running on any WordPress site you host on our LiteSpeed servers.

  1. Please ensure you take a backup of your site prior to running any database optimisation - whilst it should be fine, bad things can happen if your sites database breaks - and it's always best to have a backup you know you can restore from.
  2. Access the database optimiser by selecting LiteSpeed Cache > Manage from the left hand menu. Then click the DB Optimiser tab.
  3. You'll notice that some of the buttons have blue check-marks while others have red crosses. The check-marks indicate that the area has already been cleaned-up. If you see a red cross, that is your opportunity to do some optimization.
    Clean All
    Press this button to clean up everything at once. It executes all of the listed clean-ups, except for Optimize Tables and Clean CSS/JS Optimizer.
    Post Revisions
    Removes all old post revisions from the database. You will sacrifice your ability to go into any of your post and restore previous versions of them. Only the currently-published version of each post will be saved.
    Auto Drafts
    When you edit a post, WordPress automatically saves drafts now and then. This is to protect you in case you unexpectedly lose your connection, or your computer crashes. If you know that all of your posts are either published or saved correctly as drafts, then it is safe to remove the automatic drafts.
    Trashed Posts
    This option permanently deletes any posts or pages that have been placed in the Trash.
    Spam Comments
    There should be no need to keep comments that have been marked as spam. This option erases them permanently.
    Trashed Comments
    This option permanently deletes any comments that have been placed in the Trash.
    Trackbacks & Pingbacks
    When other blogs link to you, it can create trackbacks or pingbacks. Some WordPress themes display these in the comments section. If displaying these external links is not important to you, press this button to clear them from the database.
    Expired Transients
    Transients are the result of a form of caching that can happen in the WordPress database with the results of remote API calls. This option clears all of the expired transients from the database.
    All Transients
    This option clears all of the transients in the database, whether expired or not. NOTE: It is normal for there to still be some transients left after cleaning. Transients are caused by plugins, and are regenerated every time you reload a page.
    Optimize Tables
    Use this button to optimize the database tables. NOTE: This function is not included in a Clean All.
    Clean CSS/JS Optimizer
    If you use the Minification and/or Combination functions for CSS and/or Javascript, you can clean up the related data with this button. NOTE: This function is not included in a Clean All.

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