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# PCSORSetIterations
Sets the number of inner iterations to be used by the SOR preconditioner. The default is 1. 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCSORSetIterations(PC pc, PetscInt its, PetscInt lits)
```
Logically Collective


## Input Parameters

- ***pc -*** the preconditioner context
- ***lits -*** number of local iterations, smoothings over just variables on processor
- ***its -*** number of parallel iterations to use; each parallel iteration has lits local iterations



## Options Database Keys

- ***-pc_sor_its <its> -*** Sets number of iterations
- ***-pc_sor_lits <lits> -*** Sets number of local iterations





## Note
When run on one processor the number of smoothings is lits*its


## See Also
 `PCSOR`, `PCSORSetOmega()`, `PCSORSetSymmetric()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/sor/sor.c.html#PCSORSetIterations">src/ksp/pc/impls/sor/sor.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/sor/sor.c.html#PCSORSetIterations_SOR">PCSORSetIterations_SOR in src/ksp/pc/impls/sor/sor.c</A><BR>


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