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>The Memory Usage window</TITLE
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><H1
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><A
NAME="MEMORY"
>The Memory Usage window</A
></H1
><DIV
CLASS="SECT2"
><H2
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><A
NAME="DISPLAY"
>The display</A
></H2
><DIV
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><P
><IMG
SRC="./figs/gtop-mem.png"></P
><P
><B
>Figure 4. The gtop memory usage display</B
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><P
>       This window shows the percentage of memory used by different
       programs. Each section is colour-coded and labelled. The number 
       in brackets after a program's name is the number of instances of 
       that program running. If you have gnome-terminals or xterminals
       open, for example, you will see more than one instance of these
       and of bash, or your preferred shell, running. The default display 
       shows the Resident Set Size (the amount of physical memory used by 
       the program and the shared libraries that it needs, but not 
       swapped-out data) for all processes. Other displays can be invoked 
       from the
       <A
HREF="memory.html#M-MENU-VIEW"
><B
CLASS="GUIMENU"
>View Menu</B
></A
> and 
       the <A
HREF="preferences.html"
><B
CLASS="GUIMENU"
>Preferences</B
></A
> 
       box. 
     </P
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><DIV
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><H2
CLASS="SECT2"
><A
NAME="MEMORY-MENUS"
>Menu options affecting the memory display</A
></H2
><P
>       Several menu options can affect the display in the memory
       window. There is also a <A
HREF="processes.html#TOOLBAR"
>toolbar</A
>
       which is described in the Processes section of this document. 
     </P
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><H3
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><A
NAME="M-MENU-FILE"
><B
CLASS="GUIMENU"
>File Menu</B
></A
></H3
><P
>        The File Menu provides the same options as the File Menu on
        the Processes Window. See <A
HREF="processes.html#P-MENU-FILE"
>there
        </A
> for the description.
      </P
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><H3
CLASS="SECT3"
><A
NAME="M-MENU-VIEW"
><B
CLASS="GUIMENU"
>View Menu</B
></A
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><P
>        The View Menu provides a choice of five options:
      </P
><P
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><DL
><DT
><B
CLASS="GUIMENUITEM"
>Resident Set Size</B
></DT
><DD
><P
>           The Resident Set Size shows the total of what is in physical
           memory, both the program and any shared libraries associated
           with it. It does not show data about anything which has been
           swapped out to disk.
         </P
></DD
><DT
><B
CLASS="GUIMENUITEM"
>Shared Size</B
></DT
><DD
><P
>           FIXME: Need a clear explanation of what Shared Size memory view
           means.
         </P
></DD
><DT
><B
CLASS="GUIMENUITEM"
>Total Size</B
></DT
><DD
><P
>           FIXME: Need a clear explanation of what Total Size memory view
           means.
         </P
></DD
><DT
><B
CLASS="GUIMENUITEM"
>Virtual Size</B
></DT
><DD
><P
>           FIXME: Need a clear explanation of what Virtual Size memory view
           means.
         </P
></DD
><DT
><B
CLASS="GUIMENUITEM"
>Swapped Size</B
></DT
><DD
><P
>           Swapped Size shows the sizes of what's in swap. When 
           something is swapped out, it means that not all of the
           program is in physical memory. All or some of it has been
           moved from the memory to the hard drive, into the 'swap
           partition'. When the program requires it again, it will
           put it back into memory. The process of swapping between
           memory and disk can be slow, so programs which swap a lot
           can appear to progress in jerks rather than running smoothly. 
         </P
></DD
></DL
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><H3
CLASS="SECT3"
><A
NAME="M-MENU-SET"
><B
CLASS="GUIMENU"
>Settings Menu</B
></A
></H3
><P
>        The <B
CLASS="GUIMENU"
>Settings Menu</B
> gives access to the 
        <A
HREF="preferences.html"
><B
CLASS="GUIMENU"
>Preferences</B
></A
>
        dialogue.
      </P
></DIV
><DIV
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><H3
CLASS="SECT3"
><A
NAME="M-MENU-WIN"
><B
CLASS="GUIMENU"
>Windows Menu</B
></A
></H3
><P
>        The <B
CLASS="GUIMENU"
>Windows Menu</B
> provides a choice of which of 
        gtop's three displays to show: Processes, Memory Usage, or Filesystems.
      </P
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><B
CLASS="GUIMENU"
>Help Menu</B
></A
></H3
><P
>        The <B
CLASS="GUIMENU"
>Help Menu</B
> gives access to the 
        <B
CLASS="GUIMENU"
>About</B
> dialogue box and gtop's credits.
      </P
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