<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000">How much RAM do you have?</div><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000">It sounds to me as if on your system the active memory is being paged out, i.e. you are using swap space and/or you have issues with cached memory not being released. If you only have 1 9Gb file then there should be no problem; if you have many there might be. You may want to try lapw2_vector_split:2 if you are using mpi.</div><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000">Since nobody else to my knowledge has reported a similar problem, and I for one have never seen anything similar it seems to be very specific to whatever you are doing and your OS.</div><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000"><br></div><div class="gmail_default" style="font-family:verdana,sans-serif;color:#000000">I suspect some incorrect OS parameters, maybe some noisy memory and/or disc.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 25, 2019 at 7:12 PM Luc Fruchter <<a href="mailto:luc.fruchter@u-psud.fr">luc.fruchter@u-psud.fr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">So, my understanding of the situation is that lapw1 may create .vector <br>
files that are larger than the amount of memory needed by the lapw1 step.<br>
At the lapw2 step, the program must handle these files with less memory <br>
than needed, hence these physical / cached unefficient readings.<br>
This sounds annoying, as one cannot immediately detect the memory need <br>
for the case, from a try with the beginning of a scf cycle, as I use to do.<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr">Professor Laurence Marks<br>Department of Materials Science and Engineering<br>Northwestern University<br><a href="http://www.numis.northwestern.edu/" target="_blank">www.numis.northwestern.edu</a><div>Corrosion in 4D: <a href="http://www.numis.northwestern.edu/MURI" target="_blank">www.numis.northwestern.edu/MURI</a><br>Co-Editor, Acta Cryst A<br>"Research is to see what everybody else has seen, and to think what nobody else has thought"<br>Albert Szent-Gyorgi</div></div></div>