RE: data buffer access confusion

Morning Aman,

>> Is it a correct thing to say that when the data buffer is 
>> being read from the disk, its first kept in the PGA and then 
>> later on, it would be copied from the PGA memory to the 
>> standard buffer cache?
Not quite.

>> If no, then its alright but if yes, why such behaviour is there?
It isn't - unless of course Oracle changed things recently!

<SNIP>

>> If anyone can explain and 
>> clear this confusion, it would be just great!
The disc buffer(s) are read from disc - assuming that they are not
already in the buffer cache - and placed into the buffer cache directly.
Your server process then returns the block or blocks you requested to
your user process.

Now, I have to say that the last time I dealt with this was way back at
Oracle 8.0 (!!!) so I'm now looking forward to being (a) corrected and
(b) educated by those who know better than me!


Cheers,
Norman.


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