Spiders from china...etc cause a huge load, i dropped mine drastically by blocking them, here's something i created to do that
https://vborg.vbsupport.ru/showthread.php?t=268208 thats the vb4 version but there is a vb3 version too, try it, block the chinese bots like:
baidu
soso
sogou
yeti
yandex
omgili
Youdao
psbot
speedy
spinn3r
ichiro
To name a few

, within 30 minutes you should see the load on your server drop.