# PetscMallocPopMaximumUsage
collect the maximum memory usage over an event 
## Synopsis
```
#include "petscsys.h" 
PetscErrorCode PetscMallocPopMaximumUsage(int event, PetscLogDouble *mu)
```
Not Collective


## Input Parameter

- ***event -*** an event id; this is just for error checking



## Output Parameter

- ***mu -*** maximum amount of memory malloced during this event; high water mark relative to the beginning of the event





## See Also
 `PetscMallocDump()`, `PetscMallocView()`, `PetscMallocGetMaximumUsage()`, `PetscMemoryGetCurrentUsage()`,
`PetscMallocPushMaximumUsage()`

## Level
developer

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