Could

Can I split a huge wp_postmeta table across different databases or servers?

Can I split a huge wp_postmeta table across different databases or servers?

No. This is not practically possible primarily because there is no single interface to this table where you could implement the functionality you need, and even if you could, it would introduce some extremely gnarly problems.

Codes Basic CPT Question About Categories
Basic CPT Question About Categories
What are the 3 categories of CPT codes? What types of procedures or services are included in each of the CPT code categories? What are Category I CPT ...
Popup Trigger popup on click product image in WordPress
Trigger popup on click product image in WordPress
How do I add a pop up to a button click in WordPress? How do I make an image popup in WordPress? How do you pop everything on click? Which plugin is u...
Slow Wordpress slow query
Wordpress slow query
WordPress can be prone to slower queries on the wp_posts table, if you have a large amount of data, and many different custom post types. If you are f...