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Optistruct MUMPs

Hi all,

I have a model which presents me with the following....

"MUMPS failed in factorization because the run-time memory
requirement was larger than the estimated amount. Solver will
retry with a larger memory relaxation coefficient"

Am trying to understand if this is an issue or not (is the model being slowed, but a simple command/parameter will improve matters). My run command is "-core IN -checkel NO -out -np 8 -ddm"

The PC is an I9-9980HK with 8 cores (hyperthreading off) + 128GB ram.

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OptiStruct

v2020.0

Accepted answers

All comments

Adriano_Koga

i believe you shoud look at your memory estimatives in the .out file.

Are they too large? Depending on the model, 128GB might not be enough.

Lamster

Hi there, many thanks. This is from my .out file...

MEMORY ESTIMATION INFORMATION :
(FOR CURRENT MPI PROCESS)
-------------------------------

Solver Type is: Sparse-Matrix Solver
Direct Method

Memory (RAM) Allocated in Preprocessor : 6774 MB
Estimated Memory (RAM) for Out of Core Solution : 8442 MB
Estimated Memory (RAM) for In-Core Solution : 11171 MB
Maximum Estimated Memory (RAM) for Any Single Host
for Out of Core Solution : 65549 MB
Maximum Estimated Memory (RAM) for Any Single Host
for In-Core Solution : 84331 MB

MUMPS Solver will Run with In-Core Solution.

Do you think this would benefit from specifying available RAM (-fixlen)?

Casper Kruger

Did you resolve this issue in the end?

rosh

Any resolution for the problem?
I am facing same issue with HM and OptiStruct 2023 version