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# PCSPAISetMax
set the size of various working buffers in the `PCSPAI` preconditioner
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCSPAISetMax(PC pc, PetscInt max1)
```
## Input Parameters
- ***pc -*** the preconditioner
- ***n -*** size (default is 5000)
## See Also
`PCSPAI`, `PCSetType()`
## Level
intermediate
## Location
src/ksp/pc/impls/spai/ispai.c
## Implementations
PCSPAISetMax_SPAI in src/ksp/pc/impls/spai/ispai.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/spai/ispai.c)
[Index of all PC routines](index.md)
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[Index of all manual pages](/manualpages/singleindex.md)