Virtual Database

Virtual databases represent the database nodes detected by server agents' plugins. The performance metrics of the databases are also from the Database client-side perspective.

For example, JDBC plugins(MySQL, PostgreSQL, MariaDB, MSSQL) in the Java agent could detect the latency of SQL performance and SQL statements. As a result, SkyWalking would show database traffic, latency, success rate, and sampled slow SQLs powered by backend analysis capabilities in this dashboard.

The Database access span should have

• It is an Exit span
• Span's layer == DATABASE
• Tag key = db.statement, value = SQL statement
• Tag key = db.type, value = the type of Database
• Span's peer is the network address(IP or domain) of Database server.

Ref slow cache doc to know more slow SQL settings.