How do Oracle enqueues differ from R/3 enqueues?
R/3 enqueues also coordinate access to the application data in the database. However, they are independent of Oracle enqueues. You can have R/3 enqueues without Oracle enqueues and Oracle enqueues without R/3 enqueues. You can use transaction SM12 to monitor the R/3 enqueues and transaction DB01 to monitor Oracle enqueues.