Feb 18, 2025 · One is Adaptive Replacement Cache (ARC), which uses the server memory (RAM). The other is second level adaptive replacement cache (L2ARC), which uses cache …

Sep 11, 2021 · zfs_arc_max; zfs_arc_sys_free; By default, TrueNAS has zfs_arc_max as 0, which defaults to 50%. zfs_arc_sys_free is interesting because it tells zfs to keep at least this …

May 5, 2020 · I have a question regarding zfs cache. It's nearly consuming 40Gb of RAM and bringing the system to a crawl. I wasn't aware ZFS cache consumed this much memory. Is …

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. …

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 …

Jun 9, 2020 · I having problem with ZFS cache taking 11.9 of 14 MB of memory. How can I point ZFS cache to use ssd instead. My Freenas box configuration 1. Dell Pentium(R) Dual-Core …

Jun 27, 2023 · Just a correction, ZFS does not use memory (ram) as “traditional” write-back cache. This would create a risk for data integrity if a system lost power. Edit: Yes, ZFS …

Also whats about my ZFS-RAM usage: Can I expect to reduce it in that way? ZFS will try to use all RAM up to the specified limit. Changing pool config doesn't change this behaviour. In fact, …

Aug 21, 2023 · It works great with my dual NVME cache pool. From what I've read, compression actually improves read & write speed. I'm guessing since it's using your CPU for that and well, …

Feb 11, 2022 · ZFS is inherently copy on write, so if you write a block, it creates a new block to store the new data. The old data remains at its old location, and is marked unused (this is how …