Does the job!

I have used this plugin on 5 different multi-site wordpress and have achieved awesome results. Here’s the best one:

• 13779 revisions deleted
• database size reduced from 297MB to 65MB = 22% of original size!!
• this lead to an 11% speed gain (server side execution time to generate the page)
• we had such good results, because we had no limit on the number of revisions per post a few years back. wordpress does not automatically clean the revisions. The revisions for a post, only get cleaned up when you actually work on a post. In our case we had revisions from 2015 that were still encumbering the database.
  

Those are the settings I used:
Delete revisions of:?POST, PAGE, USER_REQUEST, WP_BLOCK, WP_TEMPLATE, WP_TEMPLATE_PART, WP_GLOBAL_STYLES, WP_NAVIGATION, WP_FONT_FAMILY, WP_FONT_FACE
Delete revisions older than:?720 days
Maximum number of - most recent - revisions to keep per post / page:?25
Delete trashed items:?YES
Delete spammed items:?YES
Delete unused tags:?YES
Delete transients:?NO
Delete pingbacks and trackbacks:?YES
Clear oEmbed cache:?NO
Keep a log:?YES
Optimize InnoDB tables:?YES
Number of excluded tables:?0

I’ve reviewed the plugin’s source code and tested it extensively and found out a few issues in the source code that I have shared with the maintainers. Overall, I think this plugin is safe to use, provided you backup your database before and that you fully understand what you’re doing.