I have a large 100s TB ZFS system that is suffering from slow read performance - it has 768GB RAM, but only uses a tiny fraction of that for metadata (<5%).
With ZFS on linux on another very similar system I'm able to double the read performance by increasing the "zfs_arc_meta_min" module parameter. This forces the arc to cache a LOT more metadata (>10x) and the performance boost is huge for our workflow which consists mainly of sequential read.
As far as I can tell there is no "arc_meta_min" tunable on freenas. Is there a similar way force freenas zfs to cache more metadata (11.1-U5)?
With ZFS on linux on another very similar system I'm able to double the read performance by increasing the "zfs_arc_meta_min" module parameter. This forces the arc to cache a LOT more metadata (>10x) and the performance boost is huge for our workflow which consists mainly of sequential read.
As far as I can tell there is no "arc_meta_min" tunable on freenas. Is there a similar way force freenas zfs to cache more metadata (11.1-U5)?