SQL DM for MySQL Query Sniffer is a functionality that records a pseudo server log and stores it in the SQL DM for MySQL embedded database. With Query sniffer enabled, SQL DM for MySQL can populate the pseudo server log in three different ways at the intervals you specify:

• By utilizing Performance Schema tables (events_statements_summary_by_digest, events_statements_history_long) and collecting snapshots at regular intervals.
• By sending the query SHOW FULL PROCESSLIST to the MySQL server.
• Or, by connecting to a running instance of the MySQL-Proxy program that is used by one or more clients to connect to a MySQL server.