In reply to Milan Petrovic.

I thought about that, however, I have not added any new plugins to my site since I moved it to Siteground just over a month ago, I never saw these files at any of my other hosts, just a myriad of other problems, hence the move. Right now my site is loading faster than ever, and all my plugins are working.

Only 2 things happened to my site recently; my move to SG, and WP update to 4.9.2

What I think was happening was somewhat normal, something similar to what will happen if you enable WP debug in your config.php file. You only really do this if you have an actual problem, which I don’t, otherwise you will fill up storage space for no good reason.

I have read about this occurrence all over, even on Drupal and Magento installations, so no, I don’t think it was a bug in WP.

As it is right now, SG have set the dump value to zero, and my site is still flying like there is no tomorrow, and this is shared hosting :-)