Thanks Waleed. You are quite correct.
I am just surprise to see the TC enqueue wait lasting for 60seconds...
Rgds, ken.
[EMAIL PROTECTED]
Sent by: To: Multiple recipients of list
ORACLE-L <[EMAIL PROTECTED]>
[EMAIL PROTECTED] cc:
Subject: Re: Wait for TC Enqueue.
06/12/2002 03:18
pm
Please respond to
ORACLE-L
I believe it has to with the fact that PQO uses direct reads bypassing the
SGA
to read the object blocks and that requires to flush (checkpoint) all
committed
changes in the SGA (dirty buffers) of that object to make sure the PQ
slaves
will access the most recent version of that object.
Regards,
Waleed Khedr
> Hi,
>
> I ask this on another forum....but unfortunately got no response....
>
> I am trying to find out what 'TC' enqueue are. And why a select would
would
> wait for TC enqueue. I beleieve they have something to do with PQO and
> checkpointing...but I could not find any more details.
>
> Any help appreciated.
>
> Thanks.
>
>
>
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