Good Linux question — answering as the UphillTech team:
When in top, typing capital "E" cycles through different memory units (KiB, MiB, GiB, etc., which are different from kB, MB and GB) in the total memory info: While lower-case "e" does the same individual process lines: From the manpage: 2c. MEMORY Usage This portion consists of two lines which may express values in kibibytes (KiB) through exbibytes (EiB) depending on the scaling factor enforced with the 'E' interactive command. Version Information: top -version : procps-ng version 3.3.9 System: CentOS 7
Full answer by Josh W: https://unix.stackexchange.com/a/126747 (CC BY-SA 3.0).
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