The number of Select Statements executed for each transaction tells us about the size of a transaction and may help with capacity planning and other analysis (see Logical Index Reads/TX).
The formula is:
Selects/TX = (SELECT_SQL_STMTS) / ( COMMIT_SQL_STMTS + ROLLBACK_SQL_STMTS)
Transactions that run high numbers of statements are at risk for increased lock contention and may require larger LOGBUFSZ buffers.