I wanted to understand what performance impacts (and other general impacts) there are to changing the Portal logging level from Warning to something finer (such as Info).
Our organization may need a finer level of logging for auditing purposes. But we want to understand the trade-offs of this. Thanks!
Specify portal log settings—Portal for ArcGIS | Documentation for ArcGIS Enterprise
Specify server log settings—ArcGIS Server | Documentation for ArcGIS Enterprise
The system will capture and record more information into the logs therefore in busy systems this can add an extra overhead that can cause a performance drop of services.
In addition to what Marcelo stated, setting a higher log level will mean that more CPU utilization will go towards capturing events and writing them to the log file. The log files will also grow in size faster and storage will fill up faster, depending on how much the system is being used. How that affects your system will depend on what resources are available to your servers and how frequently requests are being made.