When Confluence is using MS SQL, there is a database property called 'Database Connection Transaction Isolation'.

This information is very useful if printed in the log file, because Confluence cannot function properly if we are not using Read Committed with Row Versioning isolation level.

At the moment this info is only visible^ in Confluence Admin > System Information, under Database Connection Transaction Isolation.

It looks like this in the log file right now:

--------------------------
Database Information
--------------------------
Database Dialect: net.sf.hibernate.dialect.SQLServerDialect
Database Driver Name: net.sourceforge.jtds.jdbc.Driver
Database Driver Version: 1.2
Database Name: Microsoft SQL Server
Database  Version: 09.00.3054
Database Latency:0
--------------------------
System Information
--------------------------

^Generally the admin won't be able to access the GUI because Confluence can't start.

See also https://studio.plugins.atlassian.com/browse/STP-57