Dear Squid Users, I found the following squid configure options online, but I did not find enough information about them. What do they mean? Is it better to build my squid with these options? --disable-poll --enable-epoll , I know this would disable poll and enable epoll, which both wait for some event on a file descriptor, but is it useful to disable poll and enable epoll with squid? --enable-async-io=64 --with-aufs-threads=64 , I think this option is implicitly included in the previous one. How many aufs threads should I use? I read it is related to the number of cache directories, would you please explain how it is related? Is 64 a good value knowing that I configured squid with the following cache_dirs: cache_dir aufs /mnt/cachedrive2 1426227 128 512 cache_dir aufs /mnt/cachedrive3 1426227 128 512 cache_dir aufs /mnt/cachedrive4 1426227 128 512 cache_dir aufs /mnt/cachedrive5 427008 128 256 --with-aio Thanks in advance for your help! Regards, Firas Best regards, Firas