The purpose of these diagnostic alerts is to provide information that admins can use when troubleshooting problems with their site. 

These alerts are written to your application log, and details written to the atlassian-diagnostics.log file. 

• Confluence diagnostics: low free disk space
• Confluence diagnostics: low free memory
• Confluence diagnostics: node left or joined the cluster
• Confluence diagnostics: sandbox crashed or was terminated during document conversion
• Confluence diagnostics: HTTP request exceeded time limit
• Confluence diagnostics: Long running task exceeded time limit
• Confluence diagnostics: Macro rendering exceeded time limit
• Confluence diagnostics: Thread memory allocation rate exceeded limit
• Confluence diagnostics: Garbage collection exceeded time limit
• Confluence diagnostics: Rendering exceeded time limit error

Availability

Some diagnostic alerts are disabled by default, because they may have a performance impact on your site. Our support team may ask you to enable one of the following alerts when troubleshooting a specific problem:

• Sandbox crashed or was terminated
• HTTP request alert
• Macro rendering alert
• Thread memory allocation rate alert.