Ok, I read the post that you mentioned and the supported articles too.
I am a little bit confused.
In the post that you mentioned, I understand that it is not a good idea to use caching plugings. Instead, the use of memcached and varnish requires much deeper understanding and knowledge than installing a wp plugin.
But in
this post I found information and video, on how to enable caching with W3 Total Cache.
What do you recommend and what is your suggestion between these options?
Is it a good practice to use W3 Total Cache or not?