# Optimal Run Time & Understanding **URL:** \ **Category:** Using SimScale\ **Created:** [October 18, 2017, 2:15pm UTC](https://www.simscale.com/forum/t/optimal-run-time-understanding/80866 "2017-10-18T14:15:45Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![1318980](https://www.simscale.com/forum/user_avatar/www.simscale.com/1318980/32/9637_2.png) [@1318980](https://www.simscale.com/forum/u/1318980)\ **Post date:** [October 18, 2017, 7:57pm UTC](https://www.simscale.com/forum/t/optimal-run-time-understanding/80866/4 "2017-10-18T19:57:25Z")
Hi @Get_Barried, I had a look at your project. First thing is that you are running a steady state, this means that the timestep length doesn’t actually matter, think of it as more like iterations. So a time step length of 1s running for 1000s will just be 1000 iterations. The cause of your computational time limit issue actually is the setting ‘maximum runtime’: ![54](https://www.simscale.com/forum/uploads/default/original/3X/0/7/078ca0becdfca70063199eaf9ad16af3ed08e06f.png) This is from the docs: > The maximum runtime restricts the computation time (real time!) to a chosen value. If the calculation is still running at that point of time, it is forced to terminate. If your simulation is not converging because of a oversized timestep length for example, you can interrupt it after a certain amount of time without you having to check on it repeatedly. Please be aware that in the case of a maximum runtime termination, intermediate results may not be ensured. Meaning that you are hitting this time limit, you can just increase this. I usually run at about 30k(s) however with the size of your mesh you are going to take a long time to run. My advice is to make your mesh more efficient, your first mesh looks better, just needs a few more refinements to get the desired detail. After that increase the runtime slightly and you should be good. Is this what you wanted to know? I saw you ran a transient simulation as well? or did you want more info on under relaxation etc? Kind regards, Darren --- _[View the full topic](https://www.simscale.com/forum/t/optimal-run-time-understanding/80866)._