I've tried with different mem= values. I can go all the up to mem=18GB, and keep a write speed of ~256MB/s using the command "dd if=/dev/zero of=/test.raw bs=1M count=1000", but 19GB the write speeds starts to drop:
2GB = ~256MB/s
[...]
18GB = ~256MB/s
19GB = ~232MB/s
20GB = ~170MB/s
21GB = ~4.6MB/s
[...]
32GB = ~4.6MB/s
I've tried with different mem= values. I can go all the up to mem=18GB, and keep a write speed of ~256MB/s using the command "dd if=/dev/zero of=/test.raw bs=1M count=1000", but 19GB the write speeds starts to drop:
2GB = ~256MB/s
[...]
18GB = ~256MB/s
19GB = ~232MB/s
20GB = ~170MB/s
21GB = ~4.6MB/s
[...]
32GB = ~4.6MB/s