[Trilinos-Users] Sparse Matrix Memory Requirements Estimation

[Davood Ansari]

Hi all

I am assembling a kind of FECrs_Matrix in Epetra.
I wonder if it is occupying too much memory.
After the assembling process is finished and all other memory resident
arrays are deleted
and right before quitting main(), I use a getchar() to get the program
hanging before I allow it to quit.
At this time, it occupies 1.3GB of my ram while it reports the number of
non-zeros
(using NumGlobalNonzeros()) to be 32992643 entries.
My estimate is that this should only occupy about 32992643*(8 + 4) + some
overhead
of bytes which equals to 395 Mega Bytes !!!!

Am I right and should I look for any memory leakage or some thing there ?
The mentioned code is not parallel.

Please comment
Davood
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