Also once you install w3 total cache and activate it, you still have to enable object caching within the plugin.
Thanks mariuspass !
This worked for me as well (on a fairly large WP Multisite) – deleting the plugin and reinstalling. Thanks!
I have a similar question and woudl love to have seen the code that was moderated out of this thread. Wkayh or Ble1frei – do either of you have an example of this code you could post? Thanks