[petsc-users] Mat Destroy

[Jed Brown]

Barry Smith <bsmith at mcs.anl.gov> writes:
>    We call free() at that point. But not that in Unix this does not
>    mean the memory is returned to the operating system so you will not
>    see the process memory go down.  If you then allocate new objects
>    they will reuse this memory.

Also note that MatDestroy only releases a references, so if another
object still holds a reference to your matrix, nothing will be freed.
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