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  On many OSes utilities such as \command{top} report the priority and
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  On many OSes utilities such as \command{top} report the priority and
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  not the niceness.  Niceness is used by the utility
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  not the niceness.  Niceness is used by the utility
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  \file{/usr/bin/renice}: \file{/usr/bin/nice} (and
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  \file{/usr/bin/renice}: \file{/usr/bin/nice} (and
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  \command{/usr/bin/renice -n}) specifies an \emph{increment} in niceness.
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  \command{/usr/bin/renice -n}) specifies an \emph{increment} in niceness.
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  Only privileged users (usually super-users) can lower the niceness.
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  Only privileged users (usually super-users) can lower the niceness.
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  Windows has a slightly different concept of \sQuote{priority
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  Windows has a slightly different concept of \sQuote{priority
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    classes}.  We have mapped the idle priority to niceness \code{19},
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    classes}.  We have mapped the idle priority to niceness \code{19},
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  \sQuote{below normal} to \code{15}, normal to \code{0}, \sQuote{above
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  \sQuote{below normal} to \code{15}, normal to \code{0}, \sQuote{above
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}
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}
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\seealso{
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\seealso{
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  Various functions in package \pkg{parallel} create child processes
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  Various functions in package \pkg{parallel} create child processes
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  whose priority may need to be changed.
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  whose priority may need to be changed.
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  \code{\link{pskill}}.
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  \code{\link{pskill}}.
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}
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}
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\keyword{ utility }
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\keyword{ utility }