Site very slow; trouble with wp_posts and wp_commentmeta

All,

At my site https://bowilliams.com/ I started getting “Error establishing a database connection” intermittently a few days ago. Its frequency has increased to the point that that’s what happens most of the time. I can usually get my site to work eventually, but it’s very slow.

I’ve Repaired, and Repaired & Optimized following directions here:

https://www.wpbeginner.com/wp-tutorials/how-to-fix-the-error-establishing-a-database-connection-in-wordpress/

Here are the reported errors:

wp_posts: Size of indexfile is: 11239424 Should be: 11237376
wp_commentmeta: Table ‘wmwmsblo_wrdp1.wp_commentmeta’ doesn’t exist

Originally the WordPress database repair tool reported wp_commentmeta as crashed. I dropped it with PHPMyAdmin and reinstalled WordPress 3.5.2, thinking that would fix it. When it didn’t, I decided I’d better stop doing things I didn’t fully understand and get real help.

The handful of times I’ve had WordPress problems over the years I’ve been able to muddle through, often with the help of this site. This time I give up. Please help me.

Thanks much,
Bo