I recently installed Full Page Cache by Mirasvit, but I had a couple of issues:
- Pages became really static, home page and electronic chart were always the same, same username for everybody, same products. Same happened on the back office. I had to disable it.
- Load on the server and CPU consumption is exactly the same, speed is the same
I tried to install Memcache, but I had problem with pages not refreshable, I had to force refresh to see the real page, not the last, even in the backend.
I would like to try Redis.