# PetscGetResidentSetSize

Returns the maximum resident set size (memory used) for the program.

### Synopsis

    #include "petsc.h"
    int PetscGetResidentSetSize(PetscLogDouble *mem)

Not Collective

### Output Parameter

mem -memory usage in bytes

### Options Database Key

-get_resident_set_size -Print memory usage at end of run
-trmalloc_log -Activate logging of memory usage

### Notes

The memory usage reported here includes all Fortran arrays (that may be used in application-defined sections of code). This routine thus provides a more complete picture of memory usage than PetscTrSpace() for codes that employ Fortran with hardwired arrays.

### See Also

PetscTrSpace()

Level:intermediate
Location: src/sys/src/memory/mem.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages