I am running iTunes 12 on a Mac Mini (OSX El Capitan). Previously I was using a USB external drive to hold my library. I have upgraded to a Synology NAS drive with RAID so that I have redundancy in the disks.
My iTunes library has now moved onto the NAS. Since I did this iTunes is running very slow. It takes around 20 minutes just to open, hangs frequently and is slow to update the metadata on music files.
The Mac Mini and Synology NAS are connected to the same router using a Gigabit ethernet connection. I store the iTunes ITL file on the local drive (SSD). I have a mapped network share from the Mac to the NAS using SMB (which I find to be more reliable than AFP).
Any ideas how I can speed it up? Surely Gigabit ethernet speeds are faster than USB 3?