No works fine for me with 10.000 visitors hits

If you have http caching set up there should be no issue at with that level of traffic. I’d even be surprised if the php cache couldn’t handle that. I’d expect that there’s something else going on here. Maybe you’re running a plugin that issues a no cache global, which Gator Cache is compliant with. For an issue like this I’d have to take a look at your setup to determine the bottleneck and I do provide consulting services. Otherwise if there is any certain plugin or customizations your site provides, please let me know and I’ll take a look at the compatibility.