Re: Which DML use more Rollback sapce?

In article <6i0a82$km8$1_at_apple.news.easynet.net>, Colin Sutherland <c.sutherland_at_easynet.com> wrote:
>Hi
>
>Rollback extents are issued on an individual transaction basis, This means
>that no one particular statement can take up more than the other. It just
>depends on the transaction being under taken.

The rollback segments contain a "before image" of the changed blocks. So, any transaction will use the same amount of space for a block. But of course, 1000 people might simultaneously be modifying a particular block... and there is a rollback segment cache... and unresolved distributed transactions...

So the answer that encompasses any particular suite of rollback segments is, it depends what they have been doing.

>
>Colin.
>brendan_o'brien_at_wrightexpress.com wrote in message
><6hq0i7$h47$1_at_nnrp1.dejanews.com>...
>>As far as I've always thought, all three 'write' DML statements use the
>>identical amount of rollback segment space, that being the entire contents
 of
>>each affected row. If someone knows otherwise and wants to shatter my
 world,
>>I welcome the input...
>>
>>
>>In article <353ED136.5335767_at_nortel.ca>,
>> gchen <gchen_at_nortel.ca> wrote:
>>>
>>> Hi,
>>>
>>> Can anyone tell me which DML (insert, update,delete) use more space in
>>> rollback segments?
>>>
>>> Thanks
>>>
>>> G.Chen
>>> Nortel
>>>
>>> gchen_at_nortel.ca
>>>
>>>
>>
>>
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>
>

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