top -m io

  PID USERNAME     VCSW  IVCSW   READ  WRITE  FAULT  TOTAL PERCENT COMMAND
49144 postgres      263      0    263      0      0    263  90.07% postgres
 6678 tarkhil         4      0     24      0      0     24   8.22% perl
20849 root            7      0      1      3      0      4   1.37% bhyve{blk-2:0-2}
 1569 rabbitmq        3      0      1      0      0      1   0.34% beam.smp{beam.smp}