Ndoutils, nagios_servicechecks table, perfdata 255 chars

Trying to track down why NagVis only displays 255 characters in perfdata. Looks like ndoutils in the servicechecks table is cutting perfdata to 255:
perfdata | varchar(255) | NO | |

I have several checks that produce long output (over 255).

What is the best fix for this?

redefine the table and increase the size.