Optimization easyengine wordpress

I am running on a linode 1gb plan and installed easyengine and migrated my database and files, I have a high traffic site. and from time to time I still encounter database error is there a way to lessen this issue since from my old configuration I don’t usually encounter this and I expected even when I am on a high traffic peak on my site it will not go down but unfortunately it seems likely having more downtime from time to time.

is there a settings I need to add on the easyengine to optimize it more? kindly enlighten and advice some tweaks for this thanks