Slow opening of files from shared folder on Windows Server 2012

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hello,

we have upgraded our file server solution windows xp install shared folders. windows server 2012. however, have been seeing noticeable difference in network speeds when opening file on server client pc.

network transfer speeds fine when copying files server client, (approx, 5-10 seconds 140mb file). if try , open file on network. (e.g. client pc running installer shared folder on server). transfer speeds painfully slow. (running same file can take hours). have included 2 images, task manager graph showing network activity. comparing file copy on file open.


the above image when copying 142mb file server onto client pc. transfer took 10 seconds. @ 660mbps.


the above image opening same file shared folder. took approximately 3 minutes (a fast example). , averaged 19mbps.

this problem seems non-existent after server has been restarted, gradually deteriorates uptime increases. noticeable differences beginning occur after hour.

the third party software installed on server symantec endpoint protection 12. these transfer problems persist when software disabled.

i have tried disabling digitally signing smb packets according guide: http://jrs-s.net/2013/04/15/windows-server-2012-slow-networksmbcifs-problem/ , problem seemed resolved short while. has resurfaced. have 2 gpos , both have these fixes configured in them. 

does here know problem be?

thanks


hey,

i opened microsoft support ticket concerning issue, , turned out low level symantec endpoint protection drivers causing issue. av replaced , issue resolved.



Windows Server  >  File Services and Storage



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