OutOfMemoryError on lu decompositions about sparsearrays.jl

[ViralBShah]

Can you provide the matrices?

[SobhanMP]

using SparseArrays, LinearAlgebra
N = 31_308
M = 13_310_352
A = sprandn(N, N, M / N / N);
@time lu(A);

is pretty reasonable?

472.549481 seconds (396.07 k allocations: 35.162 GiB, 0.00% gc time, 0.03% compilation time)

tested on 1.9.0

@Wimmerer don't you agree?

[rayegun]

You're using Int32 indices. It is quite possible that UMFPACK 32-bit is respecting 32-bit memory limits although I will have to verify this by looking through the code.

If indeed that is the issue I can try to update UMFPACK, but it may be a significant assumption made by the library.

Can you retry with 64-bit indices?

[SobhanMP]

It is 64 bits tho 31308×31308 SparseMatrixCSC{Float64, Int64} with 13317263 stored entries:

[alexQueue]

This fixed it, thank you. Converting to 64 bits solved my problem.