I have a FreeNAS server that I know is low on RAM for its storage only 8gb of RAM for 15TB, but its worked well for my needs so far. I run zraid2 pools with a single large ZFS volume.
I just updated to 9.2.0-Release and I'v noticed that at seemingly random times during large reads that are running along at 400-600mb/s it will suddenly drop to less than 100mb/s and stay there. When it happens the only way I've found to restore performance is to reboot the FreeNAS. All of this IO is taking place on an iSCSI connection to a single Windows 7 box also with an Intel NIC connected to the same switch. I've had this setup in place for well over a year and never noticed any slowdowns until I updated to 9.2.0.
I've tried various things to get performance back including 'netif restart' and stoping/starting the iSCSI service. Short of a reboot nothing seems to work.
Does anybody have any ideas of how I can investigate further? What info I should post to help see if this is a configuration/hardware issues vs. some bug.
Thanks for any advice.
I just updated to 9.2.0-Release and I'v noticed that at seemingly random times during large reads that are running along at 400-600mb/s it will suddenly drop to less than 100mb/s and stay there. When it happens the only way I've found to restore performance is to reboot the FreeNAS. All of this IO is taking place on an iSCSI connection to a single Windows 7 box also with an Intel NIC connected to the same switch. I've had this setup in place for well over a year and never noticed any slowdowns until I updated to 9.2.0.
I've tried various things to get performance back including 'netif restart' and stoping/starting the iSCSI service. Short of a reboot nothing seems to work.
Does anybody have any ideas of how I can investigate further? What info I should post to help see if this is a configuration/hardware issues vs. some bug.
Thanks for any advice.