[THIN] Re: SMB Current Commands and SMB tuning

  • From: "Joe Shonk" <joe.shonk@xxxxxxxxx>
  • To: <thin@xxxxxxxxxxxxx>
  • Date: Mon, 15 Nov 2010 22:00:52 -0700

Here are the recommended settings from Microsoft:


Microsoft Recommended Optimization Settings for Terminal Service

                MaxWorkItems = 8196

                MaxMpxCt = 2048

                MaxRawWorkItems = 512

                MaxFreeConnections = 100

                MinFreeConnections = 32


                MaxCmds = 2048

                RegistryLazyFlushInterval = 60





From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Dan Dill
Sent: Monday, November 15, 2010 6:11 PM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] SMB Current Commands and SMB tuning




I've been digging into SMB tuning for our PS 4.5 Server 2003 x64 citrix farm
as our farm currently doesn't have MaxMpxCt or MaxCmds set on our servers.
I am confused by the results of the Redirector\Current Commands output in
perfmon.  That counter is defined as: "counts the number of requests to the
Redirector that are currently queued for service" however the graph over
time is quite flat when I could expect a queue graph to look spikey.  Is
that counter a combination of the outstanding SMB requests plus something


I've got an un-tuned server that hit 57 today without any reported issues
when I would have expected it to cap at 50 or start exhibiting problems at
that level.


Anyone know why those counters are fairly flat?  Is there a better way to
see if I'm hitting MaxCmds or do people just set it higher regardless?







Dan Dill |Systems Engineer | Harsch Investment Properties 


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