Auto-summarization

For every analog tag in the system, AVEVA Historian creates a local replication entity and a one-hour summary tag. As values arrive for an analog tag, Historian automatically computes and records a summary.

Auto-summary values are stored in their own history blocks within the auto-summary partition.

With auto-summarization, Historian can quickly and efficiently retrieve large-volume data for a long duration, even months or years.

Note: The auto-summarization feature is enabled by default, but can be disabled.