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abort low hwm [message #264313] Mon, 03 September 2007 00:17 Go to next message
alantany
Messages: 115
Registered: July 2007
Senior Member

Hello,all!
Could someone give some explain on low hwm in ASSM?
Regards!
Alan

[Updated on: Mon, 03 September 2007 00:18]

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Re: abort low hwm [message #264323 is a reply to message #264313] Mon, 03 September 2007 00:43 Go to previous messageGo to next message
Michel Cadot
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Registered: March 2007
Location: Nanterre, France, http://...
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Could you please precise the context?
What raise this question?

Regards
Michel
Re: abort low hwm [message #264324 is a reply to message #264313] Mon, 03 September 2007 00:49 Go to previous messageGo to next message
muzahid
Messages: 281
Registered: September 2004
Location: Dhaka, Bangladesh
Senior Member
The following link may help you

http://www.rampant-books.com/art_otn_dbms_space.htm
Re: abort low hwm [message #264342 is a reply to message #264323] Mon, 03 September 2007 01:25 Go to previous messageGo to next message
alantany
Messages: 115
Registered: July 2007
Senior Member

Michel Cadot wrote on Mon, 03 September 2007 00:43
Could you please precise the context?
What raise this question?

Regards
Michel


Thanks ,Michel.
I met this word from Tom's <EXPERT ONE ON ONE 9i and 10g programming techniques and solutins>
He said,in ASSM,oracle maintains a low HWM and a HWM,when does a FTS,oracle will read blocks under the low HMW directly,the blocks between low HWM and HWM,oracle will references some info from the ASSM bitmap to conferm which blocks should be read......
I am very confuse with this,why there is a low hwm and what it used for?
Regards!
Alan
Re: abort low hwm [message #264348 is a reply to message #264324] Mon, 03 September 2007 01:36 Go to previous message
alantany
Messages: 115
Registered: July 2007
Senior Member

muzahidul islam wrote on Mon, 03 September 2007 00:49
The following link may help you

http://www.rampant-books.com/art_otn_dbms_space.htm


I read it ,and I don'nt think it is relative with LOW HWM in ASSM.
Anyway, Thanks!
Alan
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