v$session + v$session_wait (在10g里功能被整合,凑合算1个吧.)
v$process
v$sql
v$sqltext
v$bh (更宁愿是x$bh)
v$lock
v$latch_children
v$sysstat
v$system_event

按组分的几组重要的性能视图

1。System 的 over view
v$sysstat , v$system_event , v$parameter

2。某个session 的当前情况
v$process , v$session , v$session_wait ,v$session_event , v$sesstat

3。SQL 的情况
v$sql , v$sqlarea , v$SQL_PLAN , V$SQL_PLAN_STATISTICS, v$sqltext_with_newlines

3. Latch / lock /ENQUEUE
v$latch , v$latch_children , v$latch_holder , v$lock ,V$ENQUEUE_STAT ,V$ENQUEUE_LOCK

4. IO 方面的
v$segstat , v$filestat , v$tempstat ,v$datafile , v$tempfile

5.shared pool / Library cache
v$Librarycache , v$rowcache , x$ksmsp

6.几个advice也不错
v$db_cache_advice , v$PGA_TARGET_ADVICE, v$SHARED_POOL_ADVICE

[@more@]