Windows server informix perfomance 12.X vs 11.X

Hello, i have a strange behaviour, maybe somebody can help. Short: Windows Server 2008R2 x64bit with 2 Informix installations. Installation are "default" no changes on parameter. One Installation Informix 11.7, the other 12.10. Created "demonstration database" for 11.7 and 12.10 server instance. For the 11.7 the installed OAT shows good storage wait times. For the 12.10 the installed OAT shows BAD storage wait times. Background: in production system database on our 11.7 seems to have better performance than on new 12.10 server. Also on production server we can see the difference in OAT. So we installed a test system. At the moment we can not find the problem. For the test system both informix installations are running on same server, configuration is default from installation, same filesystem, database files on same harddisk. On a linux system (also installed default) with informix 12.10 the OAT shows good waittimes. Maybe somebody have seen similar behaviuor on other systems? We have talked with our people running informix 12.X on windows server, they have good performance and wait times. Regards Marc

Hello, additional tests: Windows 2016 server with informix 12 and informix 14. Good performance values in OAT for informix 14, same bad values for informix 12. onstat -g iof shows for io/s values between 4 - 6 for informix 12.10. onstat -g iof shows for io/s values between 2000 -4000 for informix 14 kaio reads / writes also big difference 12.10 = 0.2xxx 14 = 0.0003 i am testing 12.10.FC12DE and 14.10.FC1DE Maybe the values are only wrong (factor 1.000)? Anybody similar values?