Slow down crawling or limit usage.

I have cloud hosting from hostinger and i am using it for my website. It has been a while since i am using your plugin and all is good only problem is that takes too much toll on my server even when i have reduced the no of posts per crawl. After talking to hostinger support they told my to find a way to slow down the crawler speed so that it doesn't peak the ram usage. I would really appreciate it if you could help me adjust the plugin so that it doesn't exceed hosting usage. It's a multisite installation with main domain vagarylife.com and indexofnews.com as sub-site. You can visit indexofnews.com/wp-login.php and i have created a editor credentials for you to take a look and set. Please email me so that i can provide it to you.