Hey Yossi,
We don't have a good solution, but there is an RFE filed on this:
6886670 trunc(@a, @b, @c, @d, @e, ..., 20);
Adam
On May 7, 2010, at 12:32 PM, Yossi Lev wrote:
> Hi
>
> I'm using a single printa statement to print multiple aggregations, and I
> would like to only show the N lines with the highest value for one of the
> printed columns. E.g:
>
> printa("%d %...@d %...@d\n", @totalCost, @totalOccurrences);
>
> and I would like to show the 10 lines with the highest total cost.
>
> Truncating only @totalCost wouldn't work because when printing multiple
> aggregations, a line is printed for each key in the *union* of all presented
> aggregations.
> Truncating both aggregations wouldn't work either because
> trunc(@totalOccurrences, 10) may remove different keys than trunc(@totalCost,
> 10) as each truncation is done according to different values.
>
> Any suggestions?
> I know I can post-process the output, but would like to check first if there
> is an option to take care of this in the DTrace script itself.
>
> Thanks,
> Yossi
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--
Adam Leventhal, Fishworks http://blogs.sun.com/ahl
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