DB Server Error logs after oneagent upgrade

[rahulgaherwar12]

I have been observing error logs on my DB server after the oneagent upgrade activity. The log is mentioned below:

2026-05-15 23:44:48.474ERROR

127.0.0.1: [NEW] - GENERIC_ERROR Cannot execute query=(memory_manager), err=Cannot execute query: memory_manager on device localhost err:Exception occurred. (Out of memory )

2026-05-16 05:14:13.458ERROR

Endpoints OK: 0 WARNING: 0 ERROR: 1 Unhealthy endpoints: 127.0.0.1 - GENERIC_ERROR Cannot execute query=(general_statistics), err=Cannot execute query: general_statistics on device localhost err:Exception occurred. (Critical error )

2026-05-16 05:21:56.061ERROR

127.0.0.1: [NEW] - GENERIC_ERROR Cannot execute query=(buffer_manager), err=Cannot execute query: buffer_manager on device localhost err:Exception occurred. (Critical error )

Kindly guide why this errors are recorded

[AntonPineiro]

Hi,

Which log file is getting those lines?

Best regards

[rahulgaherwar12]

On my DB server host overview page, this lines are coming in logs section since my oneagent and activegate upgrdation activity

[AntonPineiro]

Hi,

It means, which log path?

Best regards

[sujit_k_singh]

Hi @rahulgaherwar12 

These errors are coming from the Dynatrace database monitoring extension that runs on the OneAgent/ActiveGate to collect DB performance metrics.

I am suspecting, The OneAgent + ActiveGate upgrade also updates the Extension Execution Controller which runs these DB monitoring extensions. After the upgrade, the extension likely restarted and is encountering resource issues on the DB server.

The root cause is on the DB side

"Out of memory" and "Critical error" are responses from your database, not from Dynatrace
The extension is trying to execute its monitoring queries, but the DB server is rejecting them due to memory pressure

1. Check DB server memory utilization around those timestamps
2. Review the extension configuration
3. Consider increasing the polling interval to reduce load

Thanks,

Sujit