set vitesse.enable=0;to tell Vitesse to enter PostgreSQL-only mode. All queries will be passed directly to PostgreSQL from this point onwards.
SELECTquery, and note the elapsed time printed by psql.
set vitesse.enable=1;to tell Vitesse to exit PostgreSQL-only mode. Acceleration will be done whenever it is expedient to do so.
SELECTquery again, and note the elapsed time.
show vitesse.last;will tell you if acceleration was done on the last query you submitted.
show vitesse.last;to see if it was accelerated.
set vitesse.log_level=1;, re-run the query, and check the Postgres log for error messages.