---
sourceDocument: Xanadu Platform Analytics
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/xanadu/now-intelligence

 Release :

    - xanadu

ft:locale :

    - en-US

ft:publication_title :

    - Xanadu Platform Analytics

ft:clusterId :

    - par

bundleId :

    - par

workflow :

    - Platform


---

# Cleaning collected Performance Analytics data

# Cleaning collected Performance Analytics data {#ariaid-title1}

* Release version: Xanadu
* 
* Updated August 1, 2024
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Performance Analytics scores and snapshots may grow over time and should be routinely
cleaned to ensure optimal performance and accurate data.

Performance Analytics uses a scheduled job to remove old scores and snapshots.  
The Clean PA collections scheduled job is active by default and has no impact on performance. By default, the job runs daily so it only has to delete a small amount of data.  
Note:  
The dictionary attributes nibble_size and nibble_sleep affect the behavior of the collection cleaner job if the attributes are defined for one of the Score (pa_scores, pa_scores_l1, pa_scores_l2) tables or the Snapshot (pa_snapshots) table. For more information, see [Altering tables and fields using dictionary attributes](https://www.servicenow.com/docs/access?context=c_DictionaryAttributes&version=xanadu&pubname=xanadu-platform-administration&ft:locale=en-US).
**Related topics**   

* [Altering tables and fields using dictionary attributes](https://www.servicenow.com/docs/access?context=c_DictionaryAttributes&version=xanadu&pubname=xanadu-platform-administration&ft:locale=en-US)
* [KB0720725: Clearing Performance Analytics Score data](https://support.servicenow.com/nav_to.do?uri=/kb?id=kb_article_view&sysparm_article=KB0720725)

## Modify the Clean PA collections job {#ariaid-title2}

Modify the scheduled job to configure when Performance Analytics scores and snapshots
are cleaned. The scheduled cleanup job should not run while a data collection job is
running.

### Before you begin

Role required: pa_admin or admin

### About this task

By default, the Clean PA collections job runs at 05:00 which is appropriate when
using the default data collection jobs. If you create additional data collection jobs,
you may need to change the start time of the Clean PA collections job.

### Procedure

1. Navigate to AllPerformance AnalyticsAutomationSchedules.
2. Select the Clean PA collections job.
3. Make any necessary changes.  
   For example, change the Run time field value to change when the job runs.
4. Click Update.
**Related topics**   

* [Scheduled jobs](https://www.servicenow.com/docs/access?context=c_ScheduledJobs&version=xanadu&pubname=xanadu-platform-administration&ft:locale=en-US)
* [KB0721309: Configuring the Performance Analytics Table Cleaner](https://support.servicenow.com/nav_to.do?uri=/kb?id=kb_article_view&sysparm_article=KB0721309)

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