:orphan:
# PetscMallocGetMaximumUsage
gets the maximum amount of memory used that was obtained with `PetscMalloc()` at any time during this run, the high water mark. 
## Synopsis
```
#include "petscsys.h" 
PetscErrorCode PetscMallocGetMaximumUsage(PetscLogDouble *space)
```
Not Collective


## Output Parameter

- ***space -*** maximum number of bytes ever allocated at one time





## See Also
 `PetscMallocDump()`, `PetscMallocView()`, `PetscMemoryGetCurrentUsage()`, `PetscMalloc()`, `PetscFree()`,
`PetscMallocPushMaximumUsage()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/memory/mtr.c.html#PetscMallocGetMaximumUsage">src/sys/memory/mtr.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/memory/mtr.c)


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