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Preserving taskrun information
Timeseries in the database without taskruns are referred to as "orphaned timeseries". They can still be viewed in the client and used in calculations but merely the information which workflow was responsible for creating the timeseries has been removed. Note that simulated timeseries are not meaningful without taskrun information and should never be orphaned. Only external timeseries can be orphaned, but without taskruns they can not be amalgamated (merged) any more. In order to preserve taskruns longer than the default, the taskruns expirydays property above can be increased, Do this only when necessary. If there are many runs per day, this will make it slower to build up the localDataStore because the taskruns table is bigger.
expirytime should be increased,