[Pw_forum] n_gauss in GWW

[kazempoor at ph.iut.ac.ir]

Dear all
For calculation of quasi-particle band structure in 72- atom supercell, I used GWW and run with 32 node each of them containing 32 core with 800 Gigabyte memory. But the run goes on slowly and when I see the file *.head_status, it is in 20 step(after 20 hours) while the default for n_gauss is  79 I predict that I can not continue the run because I couldn't have these machines more than 24 hours for each run.
My question is : Can I reduce the value of n_gauss to (for example 20)? and which parameters increase the cost of computation?
thanks a lot

Ali Kazempour
Physics Department, Isfahn University of Technology