I am receiving the above panic error on my system while downloading a torrent at about 1-1.5MB a sec. My setup is a Windows 7 64 bit machine running uTorrent which points to my freenas share as its storage. I can move large files from my windows box to storage with no issues. This includes thousands of small files or several large (50-60GB). I seem to only receive the panic in the uTorrent situation. The difference in the two situations is I am simultaneously reading and writing with uTorrent as apposed to simply writing when moving files off my Windows machine. Here is my setup:
All new hardware
FreeNAS 8.3 x64
8GB RAM
6 2TB drives in three 2 drive pairs as one volume (ZFS) (CIFS share)
SUPERMICRO AOC-USAS2-L8i PCI Express SATA / SAS Eight-Port Internal RAID Adapter
When I built the system I ran auto-tune before moving any data to the drives. I had no issues moving files but running uTorrent would panic. I re-installed FreeNAS and did not tune. The same issues occurs. I tried editing loader.conf with the following, but still have the panic issue.
vm.kmem_size="1536M"
vm.kmem_size_max="2048M"
vfs.zfs.arc_min="256M"
vfs.zfs.arc_max="1024M"
#vfs.zfs.prefetch_disable="1"
#vfs.zfs.zil_disable="0"
vfs.zfs.txg.timeout="30"
vfs.zfs.vdev.max_pending="35"
vfs.zfs.vdev.min_pending="4"
vfs.zfs.txg.write_limit_override=1073741824
I'm not a *nix guy but can muddle through vi if forced. Any ideas on fixing this issue?
Just for the heck of it I ran autotune again with the settings below and same issue
sysctl:
net.inet.tcp.sendbuf_max 2097152 Generated by autotune
kern.ipc.maxsockbuf 2097152 Generated by autotune
net.inet.tcp.recvbuf_max 2097152 Generated by autotune
tuneables:
vfs.zfs.arc_max 4211862497 Generated by autotune
vm.kmem_size_max 5849809024 Generated by autotune
vm.kmem_size 4679847219 Generated by autotune
All new hardware
FreeNAS 8.3 x64
8GB RAM
6 2TB drives in three 2 drive pairs as one volume (ZFS) (CIFS share)
SUPERMICRO AOC-USAS2-L8i PCI Express SATA / SAS Eight-Port Internal RAID Adapter
When I built the system I ran auto-tune before moving any data to the drives. I had no issues moving files but running uTorrent would panic. I re-installed FreeNAS and did not tune. The same issues occurs. I tried editing loader.conf with the following, but still have the panic issue.
vm.kmem_size="1536M"
vm.kmem_size_max="2048M"
vfs.zfs.arc_min="256M"
vfs.zfs.arc_max="1024M"
#vfs.zfs.prefetch_disable="1"
#vfs.zfs.zil_disable="0"
vfs.zfs.txg.timeout="30"
vfs.zfs.vdev.max_pending="35"
vfs.zfs.vdev.min_pending="4"
vfs.zfs.txg.write_limit_override=1073741824
I'm not a *nix guy but can muddle through vi if forced. Any ideas on fixing this issue?
Just for the heck of it I ran autotune again with the settings below and same issue
sysctl:
net.inet.tcp.sendbuf_max 2097152 Generated by autotune
kern.ipc.maxsockbuf 2097152 Generated by autotune
net.inet.tcp.recvbuf_max 2097152 Generated by autotune
tuneables:
vfs.zfs.arc_max 4211862497 Generated by autotune
vm.kmem_size_max 5849809024 Generated by autotune
vm.kmem_size 4679847219 Generated by autotune