Dear users and developers, 

I am recently running a large system from Nedelec element, 14 million dofs (complex number). 

A little confused about the memory there. Then I tried a small system (34,000 dofs) to see the memory usage. It was solved with MUMPS with 1 rank. 

Then I used  PetscMemoryGetCurrentUsage() to show the memory used there. 

The pseudocode is 

KSPsolve  (INFOG(18) (size of all MUMPS internal data allocated during factorization: value on the most memory consuming processor): Memory 2:  408 MB)

[0] Maximum memory PetscMalloc()ed 49.45MB maximum size of entire process 424MB (Memory 4: 54.307M)

It seems the difference between Memory 1 and 3 is approximately the size of 30 Krylov vectors (complex).

It seems Memory 4 is not the summation of Memory 2 and 3; but on the same order of magnitude. It is a little confusing here. 

Thanks,

Xiaodong