ETA increases in LSDYNA

Hello Everyone,

I am doning in LSDyna an analysis of masonry shear wall. The model with 1m x 0,3m x 2,75m is running smoothly where I have assignned the same mesh size in both directions. Now I want to run the analysis for a wall 1m x 0,365m x 2,75m where the mesh in both directions is not equal. The model is running fine but after reaching 50% the ETA starts to increase and the simulation takes longer time, Why?

I dont want to use the mass scaling also. Is it somthing realted to the time step or somthing called Courant-Friedrichs-Lewy (CFL) condition. Any suggestion to run the analysis smootly....