:orphan:
# PCSPAISetCacheSize
specify cache size in the `PCSPAI` preconditioner
## Synopsis
```
#include "petscpc.h"
PetscErrorCode PCSPAISetCacheSize(PC pc, PetscInt cache_size)
```
## Input Parameters
- ***pc -*** the preconditioner
- ***n -*** cache size {0,1,2,3,4,5} (default 5)
## Note
`PCSPAI` uses a hash table to cache messages and avoid
redundant communication. If suggest always using
5. This parameter is irrelevant in the serial
version.
## See Also
`PCSPAI`, `PCSetType()`
## Level
intermediate
## Location
src/ksp/pc/impls/spai/ispai.c
## Implementations
PCSPAISetCacheSize_SPAI in src/ksp/pc/impls/spai/ispai.c
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/spai/ispai.c)
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