# ISClearInfoCache
clear the cache of computed index set properties 
## Synopsis
```
#include "petscis.h" 
PetscErrorCode ISClearInfoCache(IS is, PetscBool clear_permanent_local)
```
Not collective


## Input Parameters

- ***is -*** the index set
- ***clear_permanent_local -*** whether to remove the permanent status of local properties


NOTE: because all processes must agree on the global permanent status of a property,
the permanent status can only be changed with ISSetInfo(), because this routine is not collective




## See Also
 `ISInfo`, `ISInfoType`, `ISSetInfo()`, `ISClearInfoCache()`


## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/is/interface/index.c.html#ISClearInfoCache">src/vec/is/is/interface/index.c</A>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/is/interface/index.c)


[Index of all IS routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
