About memory usage in HuManN 3.0.0.alpha.3

I am using HuManN 3.0 by the command like this:
time humann -i xxx.fq -o xxx --threads x --o-log xx.log --nucleotide-database xxx/chocophlan --bypass-translated-search --output-basename xxx --remove-column-description-output --memory-use minimum
1>/dev/null 2>/dev/null
However, it takes a low rate of CPU usage, and uses a lot of memory.
Can I get some advice?
Is it caused by bowtie2 associate files? Besides, is it solved in later versions?
Thanks a lot.

Let’s continue this discussion in the more recent thread you started.