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Re: cursor: pin S wait on X

From: Charles Schultz <sacrophyte_at_gmail.com>
Date: Fri, 6 Oct 2006 09:42:56 -0500
Message-ID: <7b8774110610060742p4148e036r8882da689b3150fd@mail.gmail.com>


10.2 turns on mutexes by default. The short-term workaround is to turn off mutexes (_kks_use_mutex_pin = FALSE). There are several related bugs, notably:
5184776 10.2.0.2.0 RDBMS 10.2.0.2.0 PRODID-5 PORTID-23 Abstract: HIGH 'CURSOR: PIN S WAIT ON X'

We had one database that blocked on some dictionary objects, prohibiting all logins (even as sysdba). Unfortunately, since we were not able to reproduce, we had to close the case as Oracle wanted a hanganalyze. If you can get more information from various mutex related views, I strongly advise you open a case with Oracle.

On 10/6/06, Sanjay Mishra <smishra_97_at_yahoo.com> wrote:
>
> I had new Application in 10g Rel2 into production where I am seeing
> blocking issue which will severely affect the application as it almost
> stopped working and here is what I can see in EM
>
> Session Session ID .......Wait Class Wait Event
> Blocked
> 3 111 Concurrency cursor:pin S wait
> on X
> 0 113 Concurrency Library cache load
> lock
> 0 119 Concurrency library cache load
> lock
> 0 133 Concurrency Library Cache Load
> Lock
>
>
> I have not set any _mutex variable and it is using default. Any suggestion
>
> TIA
> Sanjay
>
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-- 
Charles Schultz

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Received on Fri Oct 06 2006 - 09:42:56 CDT

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