amazing plugin

We had caching through nginx handling most pages, but for logged in users or GET queries pages took 10-15s to load even with no load on the machine. I tried messing with thread pools, memcached/redis, and various other things before installing Query Monitor and seeing that a single query to the postmeta table (which only had 260k entries!) would take 2-3 seconds by itself. After installing this plugin and creating a key for that single table, our pages now load in half a second. Thanks so much!