Calculated Performance datasources stay at their last values when target datapoi ...

Hi all,

Using Zenoss 4.2.x, here.

We had an issue when some of our metrics weren't collected anymore. This resulted in gaps where SNMP datasources were directly graphed

On graphs where calculated perfomance datasources were used to calculate sums or ratios, instead of having NaNs the datapoints stayed at their last values for more than an hour (time to restore metrics).

This can be misleading as we can't know if the calculated metrics were really collected or simply stuck at their last values.

Any1 ever experienced this

Thank you,