---
schema_version: "1"
id: 4dea3222fe77e9c5032daa018958f6d1bbd0d148927339ad31ab0609bc250b36
title: General Limits for Salesforce Connect OData Adapters
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/platform/264-0-0/odata_general_limits.md
canonical_url: https://help.salesforce.com/s/articleView?id=platform.odata_general_limits.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 19c3402d36cdab00e2a84d65fcfcffce94b6edca934411f473c6b706c94e570d
description: Understand the limits for the OData 2.0, 4.0, and 4.01 adapters for Salesforce Connect.
products:
  - Salesforce Platform
  - Security
release: "264"
---
# General Limits for Salesforce Connect OData Adapters

Understand the limits for the OData 2.0, 4.0, and 4.01 adapters for Salesforce Connect.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition">
      <colgroup>
        <col>
      </colgroup>
      <tbody>
        <tr class="">
          <td class="slds-cell-wrap" style="vertical-align:top;">Available in: both Salesforce Classic and Lightning Experience (not for high-data-volume
            external objects)</td>

        </tr>
        <tr class="">
          <td class="slds-cell-wrap" style="vertical-align:top;">
            <p>Available in: <strong>Developer</strong> Edition</p>
            <p style="margin-bottom:0;">Available for an extra cost
              in: <strong>Enterprise</strong>, <strong>Performance</strong>, and <strong>Unlimited</strong>
              Editions</p>
          </td>

        </tr>
      </tbody>
    </table>

If your users or applications encounter rate limit errors for OData callouts, try one or more of the following.

- Select High Data Volume in the external data source definition. Doing so bypasses most rate limits, but some special behaviors and limitations apply.
- If you have Apex code that invokes the external system, modify that code to cache frequently accessed external data that seldom changes.
- Contact Salesforce to request a higher limit.

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small "><colgroup><col style="width:80%"> <col style="width:20%"></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Maximum HTTP request size for OData</td><td class="slds-cell-wrap" style="vertical-align:top;">8 MB</td></tr><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Maximum HTTP response size for OData</td><td class="slds-cell-wrap" style="vertical-align:top;">8 MB</td></tr><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Maximum result set size for an OData query</td><td class="slds-cell-wrap" style="vertical-align:top;">16 MB</td></tr><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Maximum result set size for an OData subquery</td><td class="slds-cell-wrap" style="vertical-align:top;"><span id="odata_general_limits__platform_connect_limit_subquery_result_set"><a name="odata_general_limits__platform_connect_limit_subquery_result_set"></a>1,000</span> rows</td></tr></tbody></table>

For OData 2.0 and 4.0, an org is limited to:

- 100k new external object record IDs per hour for long-term ID mapping
- 100k new external object record IDs per hour for short-term ID mapping

Starting in the Spring ‘25 release, these limits are removed for OData 4.01. This functionality is available to orgs hosted on Hyperforce on a rolling basis.

![Note](https://sf-zdocs-cdn-prod.zoominsoftware.com/tdta-platform-extend_click-264-0-0-production-enus/5f7d9219-b7b1-4552-8891-f1aba9b289fc/images/icon_note.png)

Note To view external object records in Lightning Experience, Salesforce Connect maps the external IDs of the record to Salesforce IDs. Mappings classified as short-term refer to records retrieved via Search results only. Mappings classified as long-term refer to records retrieved by all other Lightning Experience components, such as List Views. Record IDs not viewed in 365 days are subject to deletion unless the mappings have customer data attached to them.

#### See Also

- [General Limits for Salesforce Connect](https://help.salesforce.com/s/articleView?id=platform.platform_connect_general_limits.htm&release=264.0.0&type=5 "Understand the limits that apply to all Salesforce Connect adapters.")
- [OData Adapters for Salesforce Connect](https://help.salesforce.com/s/articleView?id=platform.odata_adapter_about.htm&release=264.0.0&type=5 "Connect to your back office for a complete view of your business. With the OData 2.0, 4.0, or 4.01 adapter, Salesforce Connect uses Open Data Protocol Version 2.0, Version 4.0, or Version 4.01 to access data that’s stored outside Salesforce.")