Opera poor performance after application of Windows 10 reg keys (disable SMB Client side caching)

Hi all,

We have two sites currently complaining of poor performance within Opera - very slow to logon, slow to open forms, slow to post transactions. After investigation by ourselves and their IT companies the decision was taken to remove the Windows 10 registry keys previously applied to all computers. The keys applied:-

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanWorkstationParameters]
"FileNotFoundCacheLifetime"=dword:00000000

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanWorkstationParameters]
"FileInfoCacheLifetime"=dword:00000000

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanWorkstationParameters]
"DirectoryCacheLifetime"=dword:00000000

After removal, users immediately began reporting improved performance - Opera was much faster to login, much faster opening forms and posting transactions. The performance was back to a more acceptable level.

However, these same sites have now begun to report data visibility issues - they post transactions and cannot see what they have posted and it appears at some point later on in the day. So we have reapplied the registry keys to affected computers and those users are again reporting performance degradation.

Does anyone have any further information on what is causing this issue? Are there any other workarounds that can be applied to prevent the drop in performance caused by the application of the keys?

What is confusing is that not all sites are reporting a drop in performance, even though they have these same keys applied.

The current sites in questions are Windows Server 2016 Std/Windows 10 v1903 and Windows 2012 R2/Windows 10 v1809/v1903.

Thanks,

Alex

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Comments

unknown

Hi Alex,

I had a similar problem recently , but the IT Engineers rebuilt the PC's and brought them back to factory settings.

They were HP Pro Desk 400 G6's and what we found was that there were HP Utilities enabled.

When the PC's were rebuilt without the HP Utilities , we got much faster performance.

Bit of a head scratcher but Client is happy now.

Regards,

Dermot.

alan-bourke

What is causing the issue is Microsoft changing the SMB protocol. Microsoft Access has had similar issues recently.

I have also seen that these changes will negatively affect performance on some machines, and not at all on others. It probably comes down to the network stack. If you are going to apply these settings, I would make sure that the network card drivers on the client machines are up to date. Also maybe think about settings like MTU, and Jumbo Frames if the network supports it.

You may also find that disabling one or two of the three items may solve the data visibility issue without affecting performance. Disable in this order, leaving the previous one disabled if you have to move to the next:

DirectoryCacheInfoLifetime (test)

FileNotFoundCacheLifetime (test)

FileInfoCacheLifetime (test)

alex

Hi Alan,

Thanks for your reply.

We've already looked at network cards and drivers on the PC's and servers. We've also previously recommended enabling jumbo packets but the customers IT company were reluctant to implement this (for reasons unknown). We can revisit this.

Could you please confirm MTU - this is 'Maximum Transmission Units'? I've not come across this one before.

Thanks,

Alex

alan-bourke

Yes it's basically the biggest chunk of data that can be sent in one network packet without it having to be fragmented into smaller packets, which adds overhead. Generally it's 1500.

0712131256598360.doc

jodie

Has anyone else found any solutions to the speed issues after applying the Windows 10 reg keys? We have several customers complaining to the point where they say it is unbearable.

They only have the first key applied (DirectoryCacheLifetime).

Thanks

Jodie

fzw

Hello

I had a customer recently complain about the windows 10 machines being unbearable but the windows 7 being OK. Our IT suggested checking for windows updates as there have been a few .NET updates recently. She mentioned there were a few outstanding but she also put them on a wired connection. Not sure which fixed the problem but I haven't heard from them since.

Felicity

0911060553270289.pdf

alan-bourke

Jodie

We have not had to apply these settings for quite a while as Microsoft presumably fixed whatever they broke. It may be worth upgrading one workstation to the latest Windows 10 tested with their Opera, undoing those settings and seeing how that goes.

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