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Lukas Novacek
Power BI and Fabric at enterprise scale - the things the docs don't tell you.
The June 2026 on-premises data gateway release broke a lot of Oracle connections, and people noticed within a day. The release announcement collected dozens of comments about it: ORA-12154 alias resol
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Arturo Gonzalez
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...
Arturo Gonzalez
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...