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When creating the RAM disk the size parameter may be a number expressed with the suffix k, m or g (kilo, mega, and giga). It may also be expressed with the % sign. For example if you'd like to allow the ramdisk to consume up to 25 percent of the available RAM the following technique could be used.
mount
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-t
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tmpfs
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-o
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size=25%
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tmpfs
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/media/ramdisk
Keep
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in
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mind
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that
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the
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ramdisk
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will
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not
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immediately
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consume
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the
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amount
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of
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RAM
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specified.
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This
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is
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the
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most
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it
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will
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be
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allowed
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to
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consume
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should
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it
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need
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to.
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Also
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keep
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in
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mind
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that
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if
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the
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RAM
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is
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oversubscribed
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the
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ramdisk
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could
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be
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pushed
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into
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swap.
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If
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the
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ramdisk
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find's
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itself
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in
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swap
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space
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it
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defeats
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the
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purpose
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of
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this
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expedition,
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so
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do
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try
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to
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avoid
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this
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situation.
Use the df command to confirm that the ramdisk was created.
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