SQL> select distinct stat_name from v$service_stats order by 1;

STAT_NAME
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DB CPU
DB time
Main function call count
application wait time
cluster wait time
concurrency wait time
db block changes
execute count
gc cr block receive time
gc cr blocks received
gc current block receive time
gc current blocks received
logons cumulative
opened cursors cumulative
parse count (total)
parse time elapsed
physical reads
physical writes
redo size
session cursor cache hits
session logical reads
sql execute elapsed time
user I/O wait time
user calls
user commits
user rollbacks
workarea executions - multipass
workarea executions - onepass
workarea executions - optimal