No idea why but use this Joget DX knowledge page as a guide: Joget v6 to DX Upgrade Notes#UpgradingFromAnExistingJogetv5orv6Folders where:

• Do also note the higher default maximum memory allocation pool for the JVM in "-Xmx768M". Joget DX requires more heap space and if your server has the additional RAM, do allocate more "-Xmx" memory for better performance.

"

Hi, there is not enough information to help. Try to see what is actually performing the IO, perhaps you can make use of the Application Performance Management features.

Yes. I am following the guidance from 'Upgrading From An Existing Joget v5 or v6 Folders' section.

Then the next day, the application running so slow. 

I'm wondering, is it the tomcat version is the issue or is there something else that does not compatible with Joget DX ?

here is the current of response time of one of the page. Please assist me on how to read this as I am not familiar with this. About 23 slow traces of today