So long and thanks for all the fish.....
On 2004.01.06 23:44, Sultan Syed wrote:
> Thanks for all guys
>
> Syed
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Tuesday, January 06, 2004 7:09 PM
>
>
> Hi!
>
> I wrote about recreatable chunk handling from memory and mixed up chunk
> freeing routines and chunk's data recreation routines:
> A callback routine is used when a process wants to free a recreatable
> chunk -> it can't reuse it just like that, because the original allocator
> (parent object) still has pointers pointing to this chunk, so the same
> object who allocated the chunk, has to do the freeing as well.
> That's my understanding, it'd be interesting to know whether it's correct ;)
>
> Tanel.
>
>
> > Recreatable:
> > This chunk is used, but its contents can be regenerated if needed (such
> are execution plans for cursors for example), thus Oracle can automatically
> reuse these chunks for others (of course when these chunks arenīt in use,
> thus unpinned). So when this information orignially stored in recreatable
> chunk is needed again, a callback function is executed, to recreate the
> contents in a chunk - callback functions containing instructions to recreate
> the information are registered for each recreatable chunk in heap manager's
> area if I recall correctly...)
> > Information about unpinned recreatable chunks are held in heap LRU lists.
>
>
> --
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> Author: Tanel Poder
> INET: tanel.poder.003_at_mail.ee
>
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> Author: Sultan Syed
> INET: ssyed_at_fine.ae
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--
Mladen Gogala
Oracle DBA
--
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--
Author: Mladen Gogala
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Received on Tue Jan 06 2004 - 23:09:24 CST
