---
title: Instance Data Replication system properties
description: These system properties control the behavior of the Instance Data Replication \(IDR\) application.
locale: en-US
canonical_url: https://www.servicenow.com/docs/r/australia/servicenow-platform/instance-data-replication-idr/instance-data-replication-properties.html
release: australia
product: Instance Data Replication \(IDR\)
classification: instance-data-replication-idr
topic_type: reference
last_updated: "2026-03-12"
reading_time_minutes: 2
breadcrumb: [Reference, Instance Data Replication, Manage instance data sources, Extend ServiceNow AI Platform capabilities]
---

# Instance Data Replication system properties

These system properties control the behavior of the Instance Data Replication \(IDR\) application.

To set IDR system properties, navigate to the System Properties \[sys\_properties\] table and add the property.

<table id="table_gfn_112_bxb"><thead><tr><th>

Property

</th><th>

Description

</th></tr></thead><tbody><tr><td>

The record batch size for data comparison results

 `idr.instance.comparison.batch.size`

</td><td>

If the data comparison results exceed 1 million records within the given date range, the request is divided into batches of 10,000 records.-   Type: integer
-   Default value: 10,000

</td></tr><tr><td>

The maximum runtime

 `idr.instance.comparison.max.runtime`

</td><td>

The maximum amount of time allowed for running a data comparison.-   Type: integer
-   Default value: 15 minutes

</td></tr><tr><td>

Fields to skip

 `idr.dct.comparison.skip.fields`

</td><td>

The list of fields to skip when comparing records between instances. -   Type: string
-   Default value: caller\_id,sys\_created\_on,sys\_created\_by,sys\_updated\_on,sys\_updated\_by

</td></tr></tbody>
</table><table id="table_cbn_dym_gxb"><thead><tr><th>

Property

</th><th>

Description

</th></tr></thead><tbody><tr><td>

Stop replication if an out-of-order issue occurs

 `idr.message.gap.order_enforcement.enabled`

</td><td>

By default, IDR stops replication if an out-or-order issue occurs on the consumer. You can change the default behavior when an out of order issue occurs on the consumer by adding this property and setting it to `false`. This automatically re-queues and replicates missing messages using the most recent record details from the producer without stopping replication.

-   Type: string
-   True: Stop replication
-   False: Don't stop replication and re-queue

**Note:** Each producer and consumer instance must be on the same family version to use this property. Both instances must be on Vancouver or higher.

</td></tr><tr><td>

Set attachment size limit

`idr.cdc.replication.table.reader.attachment.size`

</td><td>

By default, IDR doesn't restrict the size of attachments.You can change the default behavior by adding this property and entering a maximum size for attachments.

-   Type: integer \(size in bytes\)
-   Default value: 100,000,000

</td></tr><tr><td>

The maximum number of records allowed in a seeding request

 `idr.max.seeding.limit`

</td><td>

If this property isn't set or present, there's no limit on the number of records for seeding requests in V2 replication sets.-   Type: integer
-   Default value:

</td></tr></tbody>
</table>**Parent Topic:**[Instance Data Replication reference](https://raw.githubusercontent.com/ServiceNow/ServiceNowDocs/australia/markdown/australia/servicenow-platform/instance-data-replication-idr/reference-instance-data-replication.md)

**Related topics**  


[Data privacy in Instance Data Replication]()

[Adapter descriptions for Instance Data Replication]()

[Excluded tables in Instance Data Replication]()

[Domain separation and IDR]()

[Instance Data Replication roles]()