On 01/08/2018 07:24, Mark Martinec wrote: > I have now upgraded this host from 11.1-RELEASE-p11 to 11.2-RELEASE > and the situation has not improved. Also turned off all services. > ZFS is still leaking memory about 30 MB per hour, until the host > runs out of memory and swap space and crashes, unless I reboot it > first every four days. > > Any advise before I try to get rid of that faulted disk with a pool > (or downgrade to 10.3, which was stable) ? > > Mark > > > 2018-07-23 17:12, myself wrote: >> After upgrading an older AMD host from FreeBSD 10.3 to 11.1-RELEASE-p11 >> (amd64), ZFS is gradually eating up all memory, so that it crashes every >> few days when the memory is completely exhausted (after swapping heavily >> for a couple of hours). >> >> This machine has only 4 GB of memory. After capping up the ZFS ARC >> to 1.8 GB the machine can now stay up a bit longer, but in four days >> all the memory is used up. The machine is lightly loaded, it runs >> a bind resolver and a lightly used web server, the ps output >> does not show any excessive memory use by any process.
When you say all used up - you mean the amount of wired ram goes higher than about 90% physical ram? You can watch the wired amount in top, or calculate it as vm.stats.vm.v_wire_count * hw.pagesize ZFS ARC is marked as wired, there is also vm.max_wired which limits how much the kernel can wire, this defaults to 30% ram, so about 1.2G for you. It seems these two wired values don't interact and can add up to more than physical ram. I have reported this in bug 229764 Try the patch at https://reviews.freebsd.org/D7538 it has given me the best arc related memory improvements I have seen since 10.1, I now see arc being released instead of swap being used. -- FreeBSD - the place to B...Software Developing Shane Ambler _______________________________________________ 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"
