TrueNAS SCALE ZFS & App Sizer

Calculate system RAM requirements for ZFS ARC caching (50% max default), k3s/Docker app workloads, and network throughput capacity.

Total Pool Storage (TB)

Active Apps / Containers (e.g., Plex, Nextcloud)

Simultaneous SMB / NFS Users

Primary NIC Interface Speed

Recommended System RAM

64 GB

ZFS ARC RAM Max

32 GB

Max Network Throughput

1.16 GB/s