Disabling Autotuning implications
Hi,
We are experiecing slowness between our servers and clients. Our servers are in VMware running Windows 2008 R2. During a copy file test between two VMs we get around 20-30MB/s. If we disable autotuning on the interface the file copy speed is about 110-130MB/s.
What implications may we face if we disable autotuning across our systems - both servers and clients?
Thanks in advance.
Mark
December 21st, 2011 6:24am
Hi Mark,
Thanks for posting here.
According to your descriptions so far it seems a known issue and had been fixed by the hotfix below :
The TCP receive window autotuning feature does not work correctly in Windows Server 2008 R2 or in Windows 7
http://support.microsoft.com/kb/983528/en-us
Could you first try it and see if any improvement?
Meanwhile, it is recommended to patch the service pack 1 and also the hotfixes below for this server:
List of Network related hotfixes post RTM for Windows Server 2008 R2
http://blogs.technet.com/b/yongrhee/archive/2010/08/17/list-of-network-related-hotfixes-post-rtm-for-windows-server-2008-r2.aspx
List of Network related hotfixes post SP1 for Windows Server 2008 R2 SP1
http://blogs.technet.com/b/yongrhee/archive/2011/06/12/list-of-network-related-hotfixes-post-sp1-for-windows-server-2008-r2-sp1.aspx
Thanks.
Tiger LiPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
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December 22nd, 2011 3:13am
Hi Mark,
Thanks for posting here.
According to your descriptions so far it seems a known issue and had been fixed by the hotfix below :
The TCP receive window autotuning feature does not work correctly in Windows Server 2008 R2 or in Windows 7
http://support.microsoft.com/kb/983528/en-us
Could you first try it and see if any improvement?
Meanwhile, it is recommended to patch the service pack 1 and also the hotfixes below for this server:
List of Network related hotfixes post RTM for Windows Server 2008 R2
http://blogs.technet.com/b/yongrhee/archive/2010/08/17/list-of-network-related-hotfixes-post-rtm-for-windows-server-2008-r2.aspx
List of Network related hotfixes post SP1 for Windows Server 2008 R2 SP1
http://blogs.technet.com/b/yongrhee/archive/2011/06/12/list-of-network-related-hotfixes-post-sp1-for-windows-server-2008-r2-sp1.aspx
Thanks.
Tiger LiPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
December 22nd, 2011 11:07am