20.02.2019 3:49, Mike Tancsa wrote: > On 2/19/2019 2:35 PM, Mike Tancsa wrote: >> dd if=/dev/zero of=/tanker/test bs=1m count=100000 > > The box has 32G of RAM. If I do a > > # sysctl -w vfs.zfs.arc_max=12224866304 > vfs.zfs.arc_max: 32224866304 -> 12224866304 > # > > after WIRED memory is at 29G, it doesnt immediately reclaim it and there > is memory pressure. Booting the box with > vfs.zfs.arc_max=12224866304 > keeps WIRED at 15G
Can you repeat your test with additional vm.v_free_min=131072 (512M) or 262144 (1G)? For me, it makes kernel reclaim unused UMA memory quickly: first it goes from WIREE to FREE for a moment, then re-used as needed. _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
