wp_postmeta table over 10.1GB!

Hello,

Currenty my wp_postmeta table has over 2.639.261 rows and size over 10.1GB.

Strange is that at some time I had over 10 million rows but the size remains exactly the same. After optimizing the table, the rows becomes around 2.5m rows, but again, the size remains the same.

If I look into the table in my phpmyadmin, I have over 105.000 pages to scroll through, but if I select for example the page 104.000, result is empty..

It seems that it has some “ghost” rows which I can’t delete with any plugin.

Can you guide me with this issue?

Thanks a lot