[petsc-users] matrix preallocation

[Kong, Fande]

Hi,

For mechanics problems, the contact surface changes  during each nonlinear
iteration. Therefore, the sparsity of matrix also changes during each
nonlinear iteration. We know the preallocaiton is important for performance.

My question is:  it is possible to re-allocate memory during each nonlinear
iteration?

Fande
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