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 > > The OOM condition seems related to doing moderate IO within the VM, though > nothing within the VM itself shows high memory usage. This is the chyves > config for one of them: > > bargs -A -H -P -S > bhyve_disk_type virtio-blk > bhyve_net_type virtio-net > bhyveload_flags > chyves_guest_version 0300 > cpu 4 > creation Created on Mon Oct 23 16:17:04 CDT 2017 by > chyves v0.2.0 2016/09/11 using __create() > loader bhyveload > net_ifaces tap51 > os default > ram 16G > rcboot 0 > revert_to_snapshot > revert_to_snapshot_method off > serial nmdm51 > template no > uuid 8495a130-b837-11e7-b092-0025909a8b56 > > > I've also tried using different bhyve_disk_types, with no improvement. How is > it that bhyve can use far more memory that I'm specifying? > > - .Dustin >
Can you show 'top' output. What makes you think bhyve is using the memory? Are you using ZFS? Have you limited the vfs.zfs.arc_max to leave some free RAM for the bhyve instances? -- Allan Jude _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "[email protected]"
