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Can anybody tell me about these wait events

Posted on 2011-03-19
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Last Modified: 2012-05-11
direct path sync
direct path write
direct path read
db file sequential read & write
db file scattered read & write

i want a brief description on these wait events.


Thanks
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Question by:irukulla
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11 Comments
 
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 35173634
Have you checked the online docs?  They should have everything you need.

They can be found at www.oracle.com
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sdstuber earned 500 total points
ID: 35173998
"direct path sync"  isn't documented

I don't see "db file sequential write" or "db file scattered write" as events at all looking at v$event_name,  where are you seeing them?

the others can be found here...

http://download.oracle.com/docs/cd/E11882_01/server.112/e17110/toc.htm
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Expert Comment

by:devind
ID: 35193101

All events for 11g are detailed at
http://download.oracle.com/docs/cd/B28359_01/server.111/b28320/waitevents003.htm

As far as direct path sync event is concerned it does not exists release 11.1.0.7
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LVL 74

Expert Comment

by:sdstuber
ID: 35193997
devind,

Your post is simply an older version of the same document I already posted above.

Please read all prior posts to be sure you are contributing something unique.


Also,  "direct path sync" does exist in 11.1.0.7 and above as well as 10.2.0.5 but not 10.2.0.4 or lower
I don't know about the earlier releases of 11gR1 though.

as mentioned above check v$event_name  - it's a real event
and, also mentioned above, even though it's a real event,  it's not documented
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Expert Comment

by:slightwv (䄆 Netminder)
ID: 35435013
I'm afraid I'll have to object to this request given the reason of "found answer".

Where did you find the answer?

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Expert Comment

by:sdstuber
ID: 35511705
please accept the posts that helped or request additional information

"old question" is not a valid reason to delete
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Expert Comment

by:sdstuber
ID: 35604731
I recommend http:#35173998

it explains where to find events in the data dictionary
identifies non-existent events
and provides link to source documentation for all other events  (for those that are documented)
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