Random behaviour?

[naranekk]

Cacti 0.8.7i and Thold plugin 0.4.9, migrated from an 'ancient' installation.

Thold data were not updated and plugin didn't work well. From data which don't give values below 0, thold plugin sometimes believes it's working with negative numbers. These data are not present in the RRAs monitorized.

Disable plugin, uninstall, drop thold tables, install, enable and it seems ok.

I can create thresholds as before, but once created I detect an aparently random behaviour. Without aparent reason, sometimes the plugin "detects" value 0 in the monitorized data and launch alarms of low thresholds. In these times, in the thold_data table, the field last_read has no value. This time it seems it don't throws negative numbers.

Should I go back with an ancient thold version? Thanks in advance!