[CentOS] htdocs on NFS share / any pitfalls?

Hi all,

i have a new setup where the htdocs directory for the webserver 
is located on a nfs share. Client has cachefilesd configured. 
Compared to the old setup (htdocs directory is on the local disk)
the performance is not so gratifying. The disk is "faster" compared 
to the ethernet link but the cache should at least compensate this
a bit. Do they exist more pitfalls for such configurations?

Thanks

LF

PS: checking httpd's caching system now ...