Title: Rebuilding historical page view data
Author: staff
Published: July 21, 2022
Last modified: March 17, 2026

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 1. [Installation resources](https://docs.parse.ly/installation-resources/)
 2. [Parse.ly Integration](https://docs.parse.ly/installation-resources/parsely-integration/)
 3. [Metadata](https://docs.parse.ly/installation-resources/parsely-integration/metadata/)
 4. [Crawler](https://docs.parse.ly/installation-resources/parsely-integration/metadata/crawler/)
 5. Rebuilding historical page view data

#  Rebuilding historical page view data

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In a rebuild, we reprocess the raw pageview data and apply the latest metadata from
your site in order to update your statistics. This allows us to attach that new 
metadata to your old pageviews, or to correct your data in case of a processing 
outage.

Changes to historical data require [metadata to be recollected and updated](https://docs.parse.ly/whats-a-recrawl/)
in addition to a rebuild so that the data is retroactively updated in the dashboard.
Due to the time and resources they require, rebuilds can come at an additional cost.
We always recommend rebuilds when significant metadata changes/updates are made 
across your site so that your historical data is accurate, thus providing you with
the most value.

We are happy to review your rebuild needs to determine if additional costs will 
be incurred; please reach out to your Account Manager or support@parsely.com

Note if you have recrawled data that is three days old or less, it will be automatically
rebuilt by our system and will appear in the dashboard without a rebuild required.

That automatic rebuild runs each night and begins processing data for the third 
full previous day in each timezone. At midnight U.S. Eastern on a Wednesday night,
for example, we will begin reprocessing all data for the previous Sunday. It takes
some time for that process to run for all publishers across all time zones, and 
then for dashboard pages to fully update. Thus you won’t see the fully updated data
in the above scenario until Saturday of that week.

Last updated: March 17, 2026