Gnu top

Gnu variant of top command that displays live system resource usage.
See also bsd top.

Locations

~/.config/procps/toprc

config

Usage

Commandline

Interactive

f    # configure sort/filters
  d  # toggle display
  s  # sort by this column
x    # colourize sort-column

L    # search for string
  &  # next-match

V    # toggle process-tree (sorts alphabetically by name)

W    # saves current top config

z    # enable colours
m    # toggle mem stats/bars
t    # toggle cpu stats/bars
1    # show indv. cpus

Columns

Some key columns, and their descriptions.

VIRT  # (kb) process's heap-size (reserved, and/or actively used) (important!)
USED  # (kb) actual used memory (ram/swap)
RES   # (kb) memory used (ram)
SWAP  # (kb) memory used (swap)

Config

top's Config File (Linux processes with windows)
Id:i, Mode_altscr=0, Mode_irixps=1, Delay_time=3.0, Curwin=1
Def     fieldscur=ķ&')*+,-./012568<>?ABCFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghij
        winflags=195892, sortindx=18, maxtasks=0, graph_cpus=1, graph_mems=1
        summclr=1, msgsclr=1, headclr=3, taskclr=254
Job     fieldscur=(Ļ@<)*+,-./012568>?ABCFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghij
        winflags=163636, sortindx=18, maxtasks=0, graph_cpus=1, graph_mems=1
        summclr=6, msgsclr=6, headclr=7, taskclr=4
Mem     fieldscur=<MBND34&'()*+,-./0125689FGHIJKLOPQRSTUVWXYZ[\]^_`abcdefghij
        winflags=195892, sortindx=21, maxtasks=0, graph_cpus=0, graph_mems=0
        summclr=5, msgsclr=5, headclr=4, taskclr=10
Usr     fieldscur=)+,-./1234568;<=>?@ABCFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghij
        winflags=195892, sortindx=3, maxtasks=0, graph_cpus=0, graph_mems=0
        summclr=3, msgsclr=3, headclr=2, taskclr=6
Fixed_widest=0, Summ_mscale=1, Task_mscale=0, Zero_suppress=0