Facing an issue with Magento 2.2.9 version

I am facing an issue with Magento 2.2.9 version.

My sites get down every 2-3 days. It doesn't show any error on upfront, the browser keeps on loading for a very long time, but no data appears. When I check the apache error logs I found Max Request Workers limit exhausted. For the last 10 days, I am increasing the same the frequency is increased to 5days but still getting down. The site was launched 45 days ago, running perfectly for 30 days. Even we have not observed any hike in the traffic. The site is hosted at AWS plan is t2.2xlarge.

Please help!