Hello,
I'm seeing a strange issue when copying a file via the shell from a mounted CIFS share (on an external NAS) to the local ZFS Pool. It hammers the CPU and causes high CPU usage in the VMs on the host causing them to hang.
You can see one of the VMs that's affected below, hitting 245% CPU usage when the copy starts, if I stop the copy it returns to normal. At first I thought it was because the processes were sharing the same CPU cores, but as you can see, they are not.
CPU is a 20 x Intel(R) Xeon(R) CPU E5-2640 v4 @ 2.40GHz (1 Socket) so not the more modern and up to date CPU, but copying a file shouldn't do this, should it?
Any idea where to start with this?
I'm seeing a strange issue when copying a file via the shell from a mounted CIFS share (on an external NAS) to the local ZFS Pool. It hammers the CPU and causes high CPU usage in the VMs on the host causing them to hang.
You can see one of the VMs that's affected below, hitting 245% CPU usage when the copy starts, if I stop the copy it returns to normal. At first I thought it was because the processes were sharing the same CPU cores, but as you can see, they are not.
CPU is a 20 x Intel(R) Xeon(R) CPU E5-2640 v4 @ 2.40GHz (1 Socket) so not the more modern and up to date CPU, but copying a file shouldn't do this, should it?
Any idea where to start with this?