---
title: "Comment by Arturo Gonzalez on \"Did your Oracle data refreshes slow down after the June 2026 Power BI on-prem gateway update? Here is what happened.\" | Hashnode"
description: "Even when setting MashupFlight_DisableOracleBundledOdacProviderV2 value to True, the problem exists. FetchSize in: Computer\\HKEY_LOCAL_MACHINE\\SOFTWARE\\ORACLE\\O"
url: "https://hashnode.com/posts/did-your-oracle-data-refreshes-slow-down-after-the-june-2026-power-bi-on-prem-gateway-update-here-is-what-happened/6a81cb4b223d73f215cc6b9c/comment/6ad08e508560be388e31df2d"
---

[Discussion](https://hashnode.com/posts/did-your-oracle-data-refreshes-slow-down-after-the-june-2026-power-bi-on-prem-gateway-update-here-is-what-happened/6a81cb4b223d73f215cc6b9c)

Comment [Did your Oracle data refreshes slow down after the June 2026 Power BI on-prem gateway update? Here is what happened.](https://hashnode.com/posts/did-your-oracle-data-refreshes-slow-down-after-the-june-2026-power-bi-on-prem-gateway-update-here-is-what-happened/6a81cb4b223d73f215cc6b9c)

[Arturo Gonzalez](https://hashnode.com/@arturogf)

[Oct 15](https://hashnode.com/posts/did-your-oracle-data-refreshes-slow-down-after-the-june-2026-power-bi-on-prem-gateway-update-here-is-what-happened/6a81cb4b223d73f215cc6b9c/comment/6ad08e508560be388e31df2d)

Even when setting MashupFlight\_DisableOracleBundledOdacProviderV2 value to True, the problem exists.

FetchSize in: Computer\\HKEY\_LOCAL\_MACHINE\\SOFTWARE\\ORACLE\\ODP.NET\\4.122.19.1

(that is the unmanaged driver section)

reads 131072 on a August 2026 data gateway installed from scratch.

By changing it to 8388608, a small dataset refresh time went from almost 2 minutes to 25 secs.

I am guessing that this setting is set by the OCMT oracle client tool installation and not the gateway? No idea, but anyway it needs to be changed...