In our servers we have a habit of dropping caches at midnight.
sync; echo 3 > /proc/sys/vm/drop_caches
When I run the code it seems to free up lots of RAM, but do I really need to do that. Isn't free RAM a waste?
I have created a VPC in aws with a public subnet and a private subnet. The private subnet does not have direct access to external network. S...
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