Strange numbers on extremely long requests

[lencioni]

I have a script that runs for an extended period of time it is causing some strange numbers to appear in my reports. Here's a screenshot: http://imgur.com/t3egK

A lot of the times are reported as -2147483648.0000 microsecond which makes me believe that this is a problem with the datatype on the database column (int has a minimum value of -2147483648 and a maximum value of 2147483647). I suggest that the pmu, wt, and cpu columns be changed from int to bigint unsigned, or at minimum from int to int unsigned (these values should never be negative, right?)