WP admin page really slow

Hi, I have tried few times, and the same issue always presist when on DO.

my setup is, I have DO 2CPU/4G server running Nginx, and with managed Mysql 1G/2CPU for database.

I had the similar setup with exactly same wordpress install, same plugin, same DB on Linode which run 2CPU/4G for web server, and 1CPU/2G for mysql server.

the issue which i am facing right now is, whenever i moved back to DO with managed mysql instance, the wordpress admin page is loading really slow, and especially when open posts, or bulk saving posts. I can easily save 100 posts with no issue when the same setup in Linode, but always timed out in DO because just slow.

I noticed people is reporting the similar issue on this post: https://www.digitalocean.com/community/questions/wordpress-admin-loading-slow-publishing-saving-post-too

I must say, this is not a plugin issue, and the exactly same install ( i used rsync to move in between ) are working fine under Linode.

I like the managed DB, but i really want could be wrong here.

Andy