2017-12-01 17:53 GMT+08:00 Shane Ambler <free...@shaneware.biz>: > On 01/12/2017 13:43, Allan Jude wrote: > > On 2017-11-30 22:10, Dustin Wenz wrote: > >> I am using a zvol as the storage for the VM, and I do not have any ARC > >> limits set. However, the bhyve process itself ends up grabbing the vast > >> majority of memory. > >> > >> I’ll run a test tomorrow to get the exact output from top. > >> > >>   - .Dustin > >> > >> On Nov 30, 2017, at 5:28 PM, Allan Jude <allanj...@freebsd.org > >> <mailto:allanj...@freebsd.org>> wrote: > >> > >>> On 11/30/2017 18:15, Dustin Wenz wrote: > >>>> I'm using chyves on FreeBSD 11.1 RELEASE to manage a few VMs (guest > >>>> OS is also FreeBSD 11.1). Their sole purpose is to house some > >>>> medium-sized Postgres databases (100-200GB). The host system has 64GB > >>>> of real memory and 112GB of swap. I have configured each guest to > >>>> only use 16GB of memory, yet while doing my initial database imports > >>>> in the VMs, bhyve will quickly grow to use all available system > >>>> memory and then be killed by the kernel: > >>>> > >>>>   kernel: swap_pager: I/O error - pageout failed; blkno 1735,size > >>>> 4096, error 12 > >>>>   kernel: swap_pager: I/O error - pageout failed; blkno 1610,size > >>>> 4096, error 12 > >>>>   kernel: swap_pager: I/O error - pageout failed; blkno 1763,size > >>>> 4096, error 12 > >>>>   kernel: pid 41123 (bhyve), uid 0, was killed: out of swap space > > That's the type of errors I see when wired jumps high. I'm not seeing > this from bhyve but when your watching top, keep an eye on the wired > amount. > > -- > FreeBSD - the place to B...Sharing Devices > > Shane Ambler > > _______________________________________________ > freebsd-virtualization@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization > To unsubscribe, send any mail to "freebsd-virtualization- > unsubscr...@freebsd.org" >
As Allan said, it is likely to be your ARC cache holding memory and unfortunately right now all these swap out doesn't play well with the combination of zfs + bhyve. Try to tune your vfs.zfs.arc_max to a minimum where you give memory space enough to your VM. What I'm doing now is, launch a VM get the amount of memory and remove it from vfs.zfs.arc_max, as soon as the VM stops, I give the memory back to vfs.zfs.arc_max. Best, -- -- Marcelo Araujo (__)ara...@freebsd.org \\\'',)http://www.FreeBSD.org <http://www.freebsd.org/> \/ \ ^ Power To Server. .\. /_) _______________________________________________ freebsd-virtualization@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
