Solving MySQL suddenly occupy all memory problems

Pocketed a while ago on migrating from virtual host to an independent VPS,Maintenance of this all is my own。For performance,If your environment,Nature does not use the old configuration。

I use Ubuntu Server 16.04 + PHP 7.0 + Nginx + MySQL 5.7 In short,Stepped on a lot of holes。

Now,To record[……]

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