Server 10.3 hangs constantly

[MarkCederholm]

I never had any problems with Server 10.2.2.  But after installing 10.3 on my test server, performance has gone right down the toilet.  My feature services hang up, and if I stop a feature service, it won't restart.  Stopping and restarting the actual ArcGIS Server service puts everything into permanent stopping mode.  Once things start acting up , the only way I can clear it out again is to reboot the server.  Has anyone else seen this problem?

[VinceAngelo]

On what OS platform are you running?  How many NICs are enabled?  What patches did you apply to 10.2.2?  How many total map and feature services are you running?  Are you using 10.3 enterpise geodatabases as well, or is the 10.3 server hitting the same 10.2 data sources?

[MarkCederholm]

OS is Windows 2008 R2 Standard.  There's only one NIC, but this is a test server, so traffic is relatively low. 

No patches were applied to 10.2.2, but that version only existed on the test server.  We're still using Server 10.2.1 in production.  Right now there are 2 map-only services, and 2 feature services.  One of the feature services is being tested by some users for our ArcGIS Runtime roll-out scheduled for end of June.

Because we're a utility using ArcFM, ArcGIS Desktop and ArcSDE are currently locked down to 10.2.1 + any patches for that version.  However, I need Server 10.2.2 or higher to support the Runtime sync framework, plus new security features.

If you can't think of anything obvious that I messed up on, I can go ahead and start a Tech Support request, but I'll probably wait on that until after the DevSummit.

Thanks!