---
sourceDocument: Yokohama ServiceNow AI Platform Administration
sourceDocumentLink: https://www.servicenow.com/docs/r/yokohama/platform-administration

 Release :

    - yokohama

ft:locale :

    - en-US

ft:publication_title :

    - Yokohama ServiceNow AI Platform Administration

ft:clusterId :

    - platadm

bundleId :

    - platadm

workflow :

    - Platform


---

# Apply table rotation

# Apply table rotation {#ariaid-title1}

* Release version: Yokohama
* 
* Updated January 30, 2025
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

Preserve instance performance by applying table rotation.

## Before you begin

Determine the type of table you have and whether you can apply table rotation yourself.

* You can apply table rotation to custom tables that begin with a u_ prefix at your own discretion.
* Do not apply table rotation to scoped tables that begin with an x_ prefix without consulting ServiceNow or the third-party plugin developer first.
* Do not apply table rotation to out-of-the-box tables that begin with a sys_ prefix. Contact Customer Service and Support for help with these tables.
{#t_ApplyTableRotation__ul_rbm_mqn_3hc}

Role required: admin

## Procedure

1. Navigate to AllSystem DefinitionTable Rotations.
2. Select New.
3. On the form, fill in the fields.  
   {#t_ApplyTableRotation__table_mfs_qhy_dq__entry__2}

   | Field | Description |
   |-|-|
   | Name | The name of the table. |
   | Type | The type of rotation. Select Rotation. |
   | Rotations | The number of tables to maintain through the duration. |
   | Duration | The days and hours during which data is written to each shard. |
   | Clean base rotation | The date to clean (truncate) the base table. |
   [Table 1. Table Rotation Group form]

   {#t_ApplyTableRotation__table_mfs_qhy_dq}
4. Select Submit.
{#t_ApplyTableRotation__steps_qbb_mmh_1y}

## Result

A schedule is created and new data is written to one of the tables in the rotation group. The group includes the original table plus several additional tables.  
Note:  
Deleting a rotation deletes the additional tables and all the data. Do not delete the rotation if you still need the data.

## New table rotation group {#t_ApplyTableRotation__example_dch_sc5_bdc}

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