i have basic droplet in which i am hosting website. i see spikes in Disk I/O in all of sudden and then ram usage goes down to 0 and same goes for Memory and CPU and after a min it goes back to normal. i have checked nginx logs if some application is crashing, there were few errors which i have already solved those were related to missing images, but i am not able to find any root cause of it or the process which is causing it.
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