Smb slow windows 7

Sign in. United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. File Services and Storage. Sign in to vote. Thanks for the future help! After putting them in production I noticed that some of our applications performed really badly on anything that accessed our projects on the Z: drive. The test folder has about 40 sibling folders. On the new machines this takes 1. After searching around I've excluded SMB1 issues disabled on all machines , SMB Redirector Cache issues which came up in regards to folders with many files mostly, which I don't have anyway and driver issues.

I've compared the registry entries of the LanmanWorkstation hive and any other network settings I could think off, but they all match. I've checked all the access permissions I could think of as well even though there are no errors functionality wise. The event logs in event viewer also don't report on anything out of the ordinary. Everything is exactly according to the SMB2 dialect 3.

The other invocations are answered by the SMB Redirector cache client side, and never hit the wire I verified which I verified by setting the registry key DirectoryCacheLifetime to 0 and rerunning the trace.

Disabling the cache shows the individual invocations and the time duration goes up to 0. This then repeats another times with the only difference that the Find Request File returning all the sibling folders is no longer issued and but is cached once again verified by setting DirectoryCacheLifetime to 0, which takes the runtime up to 3. The closest I can work it out from this is that on the machines that have issues, PathIsDirectory must take a different path through the networking stack, in combination with the FileInfoCacheLifetime not working properly on the new machines.

I have verified that the networking dll's used on both machine are bytewise identical so if that is the case it must be configuration somewhere that I'm unaware of. I'm going to give it a while and look at it with fresh eyes.

Once again, happy with any and all suggestions! Attachments: Up to 10 attachments including images can be used with a maximum of 3. I could not respond directly to your response because there is a character limit on that type of message which I exceeded so I am responding via a new "answer". Can you help us improve? Resolved my issue. Clear instructions. Easy to follow. No jargon. Pictures helped.

Didn't match my screen. Incorrect instructions. Too technical. Not enough information. Not enough pictures. Any additional feedback? Submit feedback. Thank you for your feedback!