4 ms·

Because you can echo 3 | sudo tee /proc/sys/vm/drop_caches but sudo echo 3 > /proc/sys/vm/drop_caches won't work.

• julian37 15y ago
  Right, that's what I was missing. That makes sense, and come to think about it, is a very useful addition to my toolbox. Thanks pdw and jochu!
• tmhedberg 15y ago
  You can also accomplish the same thing with: sudo sysctl -w vm.drop_caches=3