One of the websites I manage Digital Signage Blog was not displaying correctly (posts were not displaying, menu was missing links to the categories and only displaying pages) and after some investigation, I discovered one of the database tables (the categories table – wp_term_taxonomy) was corrupted. I attempted to repair the database by using these instructions How to check and repair MySQL tables using MySQLcheck and How to repair WordPress databases but both instructions didn’t work.
When I ran the repairs using the above methods there were no errors being reported that the database was corrupted. The only way I figured out that one of the tables was actually corrupted was to login to phpMyAdmin and saw the status of the table being in use.

When I tried repairing that particular table using phpMyAdmin and it reported ‘Can’t create new tempfile:..’ and the ‘Operation failed’

So to fix this I had to login to my VPS and use the SSH terminal to issue the following commands. Firstly go to the database files
cd /var/lib/mysql/[name_of_your_database]
Then use this command to fix it:
myisamchk -r -f wp-term_taxonomy.MYI
This was the result, it fixed 3 indexes.

Here’s a video of how to do this:
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