PersistedAggregationBackfillProgress is a datatype for progress information for a backfilling persisted aggregation.

This datatype is ultimately used by the persistedAggregations() query.

Table: PersistedAggregationBackfillProgress

ParameterTypeRequiredDefaultStabilityDescription
Some input parameters may be required, as indicated in the Required column. For return values, this indicates that you are assured a value if the field is requested for the results.
Table last updated: Jul 13, 2026
backfillPhasePersistedAggregationBackfillPhaseyes PreviewThe current phase of backfilling. See PersistedAggregationBackfillPhase.
intervalsCompletedlongyes PreviewNumber of intervals already processed.
oldestUnprocessedTimelongyes PreviewEpoch milliseconds of the next planned execution (i.e., the frontier of progress).
targetStartTimelongyes PreviewEpoch milliseconds of the backfill start date (the earliest point to process).
totalIntervalslongyes PreviewTotal number of intervals in the backfill window.