Squid - cache_peer

[viswa <waytoviswa@xxxxxxxxx>]

hello everyone

i have four squid servers with WCCP configuration and working good. i 
like to improve caching performance, now i simply using the cache_peer 
for server1 following :

cache_peer server2 sibling 3128 3130 proxy-only
cache_peer server3 sibling 3128 3130 proxy-only
cache_peer server4 sibling 3128 3130 proxy-only

i request u to for best cache_peer with options

Thanks
-Viswa