Oracle9i到10g空闲等待事件的变化

　　在Oracle10gR2中,这个数字大大增加:

/* -------------------------------- */
create table　　　　　STATS$IDLE_EVENT
(event　　　　　　　　varchar2(64)　　 not null
,constraint STATS$IDLE_EVENT_PK primary key (event)
using index tablespace &&tablespace_name
　 storage (initial 100k next 100k pctincrease 0)
) tablespace &&tablespace_name
　storage (initial 100k next 100k
pctincrease 0) pctfree 5 pctused 40;
insert into STATS$IDLE_EVENT (event)
values ('smon timer');
insert into STATS$IDLE_EVENT (event)
values ('pmon timer');
insert into STATS$IDLE_EVENT (event)
values ('rdbms ipc message');
insert into STATS$IDLE_EVENT (event)
values ('Null event');
insert into STATS$IDLE_EVENT (event)
values ('parallel query dequeue');
insert into STATS$IDLE_EVENT (event)
values ('pipe get');
insert into STATS$IDLE_EVENT (event)
values ('client message');
insert into STATS$IDLE_EVENT (event)
values ('SQL*Net message to client');
insert into STATS$IDLE_EVENT (event)
values ('SQL*Net message from client');
insert into STATS$IDLE_EVENT (event)
values ('SQL*Net more data from client');
insert into STATS$IDLE_EVENT (event)
values ('dispatcher timer');
insert into STATS$IDLE_EVENT (event)
values ('virtual circuit status');
insert into STATS$IDLE_EVENT (event)
values ('lock manager wait for remote message');
insert into STATS$IDLE_EVENT (event)
values ('PX Idle Wait');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq: Execution Msg');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq: Table Q Normal');
insert into STATS$IDLE_EVENT (event)
values ('wakeup time manager');
insert into STATS$IDLE_EVENT (event)
values ('slave wait');
insert into STATS$IDLE_EVENT (event)
values ('i/o slave wait');
insert into STATS$IDLE_EVENT (event)
values ('jobq slave wait');
insert into STATS$IDLE_EVENT (event)
values ('null event');
insert into STATS$IDLE_EVENT (event)
values ('gcs remote message');
insert into STATS$IDLE_EVENT (event)
values ('gcs for action');
insert into STATS$IDLE_EVENT (event)
values ('ges remote message');
insert into STATS$IDLE_EVENT (event)
values ('queue messages');
insert into STATS$IDLE_EVENT (event)
values ('wait for unread message on broadcast channel');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq Credit: send blkd');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq: Execute Reply');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq: Signal ACK');
insert into STATS$IDLE_EVENT (event)
values ('PX Deque wait');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq Credit: need buffer');
insert into STATS$IDLE_EVENT (event)
values ('STREAMS apply coord waiting for slave message');
insert into STATS$IDLE_EVENT (event)
values ('STREAMS apply slave waiting for coord message');
insert into STATS$IDLE_EVENT (event)
values ('Queue Monitor Wait');
insert into STATS$IDLE_EVENT (event)
values ('Queue Monitor Slave Wait');
insert into STATS$IDLE_EVENT (event)
values ('wakeup event for builder');
insert into STATS$IDLE_EVENT (event)
values ('wakeup event for preparer');
insert into STATS$IDLE_EVENT (event)
values ('wakeup event for reader');
insert into STATS$IDLE_EVENT (event)
values ('wait for activate message');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq: Par Recov Execute');
insert into STATS$IDLE_EVENT (event)
values ('PX Deq: Table Q Sample');
insert into STATS$IDLE_EVENT (event)
values ('STREAMS apply slave idle wait');
insert into STATS$IDLE_EVENT (event)
values ('STREAMS capture process filter callback wait for ruleset');
insert into STATS$IDLE_EVENT (event)
values ('STREAMS fetch slave waiting for txns');
insert into STATS$IDLE_EVENT (event)
values ('STREAMS waiting for subscribers to catch up');
insert into STATS$IDLE_EVENT (event)
values ('Queue Monitor Shutdown Wait');
insert into STATS$IDLE_EVENT (event)
values ('AQ Proxy Cleanup Wait');
insert into STATS$IDLE_EVENT (event)
values ('knlqdeq');
insert into STATS$IDLE_EVENT (event)
values ('class slave wait');
insert into STATS$IDLE_EVENT (event)
values ('master wait');
insert into STATS$IDLE_EVENT (event)
values ('DIAG idle wait');
insert into STATS$IDLE_EVENT (event)
values ('ASM background timer');
insert into STATS$IDLE_EVENT (event)
values ('KSV master wait');
insert into STATS$IDLE_EVENT (event)
values ('EMON idle wait');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: RAC qmn coordinator idle wait');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: qmn coordinator idle wait');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: qmn slave idle wait');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: waiting for time management or cleanup tasks');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: waiting for messages in the queue');
insert into STATS$IDLE_EVENT (event)
values ('Streams fetch slave: waiting for txns');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: deallocate messages from Streams Pool');
insert into STATS$IDLE_EVENT (event)
values ('Streams AQ: delete acknowledged messages');
insert into STATS$IDLE_EVENT (event)
values ('LNS ASYNC archive log');
insert into STATS$IDLE_EVENT (event)
values ('LNS ASYNC dest activation');
insert into STATS$IDLE_EVENT (event)
values ('LNS ASYNC end of log');
insert into STATS$IDLE_EVENT (event)
values ('LogMiner: client waiting for transaction');
insert into STATS$IDLE_EVENT (event)
values ('LogMiner: slave waiting for activate message');
insert into STATS$IDLE_EVENT (event)
values ('LogMiner: wakeup event for builder');
insert into STATS$IDLE_EVENT (event)
values ('LogMiner: wakeup event for preparer');
insert into STATS$IDLE_EVENT (event)
values ('LogMiner: wakeup event for reader');
commit;
create public synonym　STATS$IDLE_EVENT　 for STATS$IDLE_EVENT;
/* ---------------------------------- */

　　如果你注意到的话,很多等待事件在9i中属于空闲等待,但是未被列入,有的是为了向后兼容,有的则是因为Bug。