@Ritesh I suspect the issue is the low side of your memory to begin with, but wanted to also add that if you add more memory and still experience issues where it seems the memory or CPU usage is constantly high, you can reach out to Vultr's support as the issue may be on the hypervisor where some "noisy neighbours" may be happening which is starving your VM of resources. I had a similar issue a few months ago and they addressed it on their end after a few days.
