Linux doesn’t use the whole cache clearing technique from too full to make it clean and happy

introduce

Today, I saw the cloud server, the memory is full, I am a little depressed, do it

And then do the following. Mm-hmm

Let’s find out what’s occupying our king’s land free-m

or top

• Above several methods look after
• First, pS-9 xxoo deleted a bunch of useless processes

Look at top and find that I rely incredibly have so much spare memory

Looks like I’m gonna have to do something big here

The command to clear the cache hit it

• echo 1 > /proc/sys/vm/drop_caches
• echo 2 > /proc/sys/vm/drop_caches
• echo 3 > /proc/sys/vm/drop_caches

I don’t know what these three commands mean, but the memory is smaller, who knows comment comment

After doing it, I was happy ^_^

Let’s use top again

^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ happy memory a lot less ^_^ ^_^ ^_^

nip

ok

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