I realize this doesn't apply to your specific issue, but I often see recommendations to disable RSS. Just wanted to throw this out there for those who may not be aware. Applies to Virtual Machines on vSphere: https://kb.vmware.com/kb/2008925.
I specifically encountered this issue running a copy of Network Observer on a VM. The amount of inbound traffic caused CPU utilization to go crazy. Since this was multi-CPU VM, enabling RSS resolved the issue. - Sean On Thu, May 12, 2016 at 10:33 AM, Scott Schneider < [email protected]> wrote: > Thanks for all the suggestions. > > I disabled RSS and Chimney offload, it made no difference. It is a 4 port > Qlogic (Broadcom) 1 GB card in the server. I updated the drivers to latest > on Dell’s site. When I put a second network card in the backup server and > put it on a separate closed switch (only the 2 servers attached to the > switch), I get the same slow throughput. > > The folder I am using for the test has 31 GB, 13694 folders and 517798 > files. It is consistently slow. A folder that copies quickly has 18 GB, > 31768 files and 795 folders. > > I see there is a firmware update for the Qlogic card. I may be able to try > that after hours. > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Rene de Haas > *Sent:* Thursday, May 12, 2016 1:47 PM > *To:* [email protected] > *Subject:* Re: [NTSysADM] RE: Windows 2008 R2 server > > > > Yes, I read about those as well, however since it's only certain folders > my guess is it's something else. > > Does it matter at what time you do the copy? Any file in that folder? To > which server? > > > > On Thu, May 12, 2016 at 6:31 PM, Kennedy, Jim < > [email protected]> wrote: > > Check the nic settings. Disable RSS and Chimney offload. > > > > https://support.microsoft.com/en-us/kb/951037 > > > > > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Scott Schneider > *Sent:* Thursday, May 12, 2016 12:07 PM > *To:* [email protected] > *Subject:* [NTSysADM] Windows 2008 R2 server > > > > Has anyone ever run across a really poor performance copying specific > folders from 2008 R2? We have a 1 GB backbone with HP switches. I did my > test copying to a windows 2012 R2 fully patched server (which is the same > Dell backup server using Arcserve). Both servers are fully patched. The > production server is a file server, and also an app server, using apache > and a canned Oracle database. Max connections are 50 endpoints. I noticed > the performance hit running our nightly backups. Overall throughput crawled > to around 1 GB per minute, it used to run at about 3 GB per minute. I set > up a private network for copying/backup and the speed didn’t improve. I > then experimented with trying individual folder copies. That is when I > noticed some folders would copy at 80 to 100 MB per second, while others > would copy at 7 to 8 MB per second. > > A second almost identical server Dell 2008 R2 server with the Oracle > database consistently gets 3+ GB throughput for the nightly backup. It > doesn’t exhibit the slow throughput. No other servers in our environment > experience the slow throughput. > > > > Strangely the issue only appears with copying specific folders. Any > ideas, I’m stumped….. > > > > Thanks > > > > Scott Schneider > > > > > > >
