Acceptable SRT for SMB2 Notify?

asked 2019-07-29 13:27:52 +0000

I've been digging into packet captures to troubleshoot some issues with opening office files and renaming files from the SMB shares in my network. I've been using the SMB2 Service Response Time report to look at the stats.

The only number that is looking concerning to me is the accumulated SRT for NOTIFY:

===========================================================================
SMB2 Service Response Time Statistics - packet_capture.pcap:
Index  Procedure  Calls  Min SRT (s)  Max SRT (s)  Avg SRT (s)  Sum SRT (s)
---------------------------------------------------------------------------
SMB2 
Notify         15      9     0.004195    11.765356     4.396085    39.564761
Create          5    836     0.000028     0.105900     0.001493     1.247830
Write          9    682     0.000030     0.108162     0.001639     1.117820
GetInfo         16    682     0.000026     0.108283     0.001113     0.759180
Read           8    693     0.000027     0.169438     0.001089     0.754692
Close          6    741     0.000026     0.121083     0.001013     0.750933
Ioctl         11    500     0.000029     0.185212     0.001105     0.552645
Tree Connect          3      5     0.000034     0.139351     0.027955     0.139776
Find          14     46     0.000027     0.015875     0.002177     0.100121
Tree Disconnect          4     10     0.000032     0.011280     0.002744     0.027444
SetInfo         17     12     0.000030     0.013050     0.001713     0.020562
Session Logoff          2      5     0.000087     0.011007     0.003529     0.017643
Session Setup          1     12     0.000098     0.007990     0.001140     0.013685
Negotiate Protocol          0      4     0.000030     0.002684     0.001063     0.004251
KeepAlive         13      1     0.001041     0.001041     0.001041     0.001041
SMB2 
---------------------------------------------------------------------------

I've been trying to find supporting documentation, but have been unsuccessful so far. Would I be close to correct if I'm thinking the notify commands are asynchronous in nature and notify SRT isn't a critical metric for SMB2 performance analysis?

i.e. it's not a big deal if someone's Windows Explorer doesn't update a file time stamp or display a new file for 4 seconds after it's updated? Not like someone waiting 5-10 seconds for a small word or excel document to save to the network share...

Thanks,

Chad Worthman

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