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.
Free Windows Admin Tool Kit Click here and download it now
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

This topic is archived. No further replies will be accepted.

Other recent topics Other recent topics