I'm running a few instances of GRASS, and I've hit an extreme bottleneck. The problem is that I can't figure out what it is.
I have a module that I wrote in the GRASS 7.0 environment that should be I/O bound. It normally takes about 10 minutes to finish running. I have seven instances running from one disk, and each one is taking on the order of 10 hours to finish. Why? NOTE: - The processes aren't I/O bound. 'iostat' lists a constant 30 MB/s transfer rate. It should be able to handle twice that. The transfers per second are < 100, and I've seen it handle triple that (at 60 MB/s). - The load average is currently below 1. I have 16 processors, so CPU shouldn't be a problem. - I have 16 GB of RAM, and it's full, but not thrashing. If it's not I/O, CPU, or RAM, then what is it slowing GRASS? Thanks, Seth_______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
