I had pressed the same optimize website button around 36 hrs back and i did not come up with any errors. Also even though i was used W3 total cache from quite sometime now, my web page loading was 4+sec (only faster than 4% websites). Now my website is loading in less than a second according to loadimpact.com. I am not sure but probably the problem was, I was using database caching and object caching which are not recommended in shared hosting. I disabled it. Something clicked to reduce the load time so much. I don’t know what but i am happy.
Shakir
