The Distribution Service in QlikView 12 is more intensive in the use of resources (namely, RAM and CPU) than QlikView 11.20. This may lead, as it did in our case, to lots of tasks competing for those resources, and it turn, taking longer instead of faster to reload.
There are some settings you can adjust, starting by the number of concurrent tasks (I don't know your environment and tasks, but somewhere between 4 and 6, no more than that) and others you can find in the Qlik Support portal, such as
- New settings in QDS 12: https://qliksupport.force.com/articles/000031003
- Queued tasks: https://qliksupport.force.com/articles/Basic/Tasks-are-not-executed-as-expected-and-are-shown-in-status-Queued
- Resource consumption in QlikView 12: https://qliksupport.force.com/articles/000046729
We also had other non-QlikView related issues like connecting to active directory, which was taking a lot more time than usual and we had to tweak those queries.
We had the same issue. We used a virtual machine in the past. The Service was taking much longer than on local machine. Especially after Update to Version 12.x. We had 48 GB RAM but QV just used 20 GB for the Service and reload. We tried several different setting in the server settings, but without success.
We then switched to a hardware machine with 128 GB RAM and now there will be almost 90 GB RAM allocated and the reload is a bit faster than on local machin but compared to our previous machine it take almost 4 hours less to reload the files.
Maybe you try to upgrade your RAM or try a hardware server if you use VM.
You also should check that the QV Version on you local machine is the same on your server.