RE: Very high buffer gets

select blocks, num_rows, to_char(last_analyzed, 'DD-MON-YYYY HH24:MI:SS')
from all_tables
where table_name in ('AQ$_QUEUE_TABLES', 'AQ$_QUEUE_TABLE_AFFINITIES', 'AQ$_QUEUES')     BLOCKS NUM_ROWS TO_CHAR(LAST_ANALYZED,'DD-

---------- ---------- --------------------------
         1         61 06-FEB-2006 15:50:09
         2        136 06-FEB-2006 15:51:14
         1         61 06-FEB-2006 15:50:48 

Naveen

-----Original Message-----
From: Stephane Faroult [mailto:sfaroult_at_roughsea.com] Sent: Monday, February 13, 2006 12:11 PM To: Nahata, Naveen (US - Glen Mills)
Cc: oracle-l_at_freelists.org
Subject: Re: Very high buffer gets

High-water mark of death? If you have recently had some service interruption and requests have accumulated into the queue, it might be an explanation.

Stephane Faroult

Nahata, Naveen (US - Glen Mills) wrote:

>Hi All,
>
>After tracing the QMON process which was doing lots of buffer gets, I
>found this culprit. None of the three tables involved in the query have
>more than 2 blocks. I know the nested loop is iterating over the blocks
>but that should still not account for more than 200 blocks / execution.
>Why do I see such high values for buffer gets?
>
>
>

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