I am doing a blastn search on a local machine (4 cores, 8 threads, 8GB mem). My database is NCBI bacteria, archaea, viral refseq, which is about 200GB. What I noticed now is that the mem usage is very high with 7711M used, ~14M unused, the VM usage is 395G. However, my CPU is in very low usage: 1.6% usr, 2.85% sys, ~95% idle. Is this normal?
The blastn command I used is
blastn -db "bacteria_genomic_74 viral_genomic_74 archaea_genomic_74" \ -query input_file \ -out output_file \ -outfmt 6 \ -num_threads 8 \ -max_target_seqs 5
The entry of blastn in the top command says: CPU ~9% #TH 16 MEM 2304K
Sorry cannot get a snapshot of the top command since the computer is running and not responding very quickly. So I do not want to mess with it.