High Availability Data Guard, Sharding and Global Data Services (MOSC)

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Data Guard Reporting TNS Timeouts Due to Apparent Standby Performance Issue?

edited May 8, 2024 7:39PM in High Availability Data Guard, Sharding and Global Data Services (MOSC) 3 commentsAnswered

Hi everyone - got a weird one here and wanted to bounce it off the community before taking it to MOS for a SR.

Oracle Database 19c Enterprise Edition, Windows Server 2016, using Data Guard and the Broker.


A few days ago I noticed in the alert files of our test environment primary and standby databases that there were a lot of TNS timeout related errors indicating there was some kind of intermittent connectivity issue between them. I checked to see which logs had shipped and it was mostly current (about 12 hours behind), but I couldn't figure out anything that could be causing the issue. Connectivity was good, etc. Since I had logged on to install the latest 19.23 patch, I went ahead and patched both environments.

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