Strange behaviour when read over NFS

Hi everone,

I have a strange problem during these days when I tried to service jpg,png,gif files from freenas to nginx(ubuntu) over NFS.

I've never tried before service chunky files like png on NFS. When I bring online our systems to serve static content from freenas, write operations occurs on disks while only reading be in question.

I did not know whats under the hood in arc calculations. Maybe last access times of files should written on disks so these write operations comes from that...

Strange behaviour when read over NFS