Mar 24, 2022 · ZFS REQUIRES ram. The more ram you feed ZFS, the better ZFS will perform. If ZFS does not have enough RAM, it will perform very, very badly, and could cause other …

Jul 10, 2015 · One of the more beneficial features of the ZFS filesystem is the way it allows for tiered caching of data through the use of memory, read and write caches. ­By optimizing …

Dec 10, 2025 · ZFS has several features to help improve performance for frequent access data read operations. One is Adaptive Replacement Cache (ARC), which uses the server memory …

Jan 4, 2023 · Not really related to IO at all. I’m going to evaluate using LVM on ZFS, more specifically ZVOL to see if the performance can be helped. There is an obvious problem …

Nov 22, 2023 · Hello, My system has 48GB of memory but half of it is used by the ZFS Cache. I need to run more VMs but in their menu its says that only 5 GiB is available for me to use. …

Apr 16, 2023 · I use ZFS on my laptop on a single disk, because I still have snapshot feature, easy ZFS to ZFS backup and ARC cache available that way. So there are valid use cases for …

Mar 9, 2021 · Hi guys-We a large 500 TB pool with 4x 8 TB nvme cache drives. From what I can see with zpool iostat -v, they are barely touched. What optimizations can I do to force more …

Jun 9, 2020 · I having problem with ZFS cache taking 11.9 of 14 MB of memory. Why would you think this is a problem? FreeNAS isn't Windows, where having memory free is crucial for …

Dec 8, 2022 · I have a scale 22.02 system with 32G of ram and about 12TB usable space (18TB raw). When I first installed I saw the cache memory usage usually around 15G, which was as …

Mar 4, 2016 · To improve read performance, ZFS utilizes system memory as an Adaptive Replacement Cache (ARC), which stores your file system’s most frequently and recently used …