Re: what's "enq:TX - contention"

The sessions were waiting on TX-4.

We can't find the blocker.

Thanks

On Nov 30, 2007 12:04 AM, Bobak, Mark <Mark.Bobak_at_il.proquest.com> wrote:

> When this is happening, in what mode is the lock being held? (I assume
> 'X'.) In what mode is the waiting lock? ('S' mode?)
>
>
>
> -Mark
>
>
>
> *--
> Mark J. Bobak*
> *Senior Database Administrator, System & Product Technologies*
> ProQuest
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>
> *From:* oracle-l-bounce_at_freelists.org [mailto:
> oracle-l-bounce_at_freelists.org] *On Behalf Of *Eagle Fan
> *Sent:* Thursday, November 29, 2007 3:05 AM
> *To:* oracle-l
> *Subject:* Re: what's "enq:TX - contention"
>
>
>
> any comments?
>
> Thanks
>
> On Nov 27, 2007 12:19 AM, Eagle Fan <eagle.f_at_gmail.com> wrote:
>
> hi:
>
>
>
> In 10g, oracle has four TX wait events:
>
>
>
> 1. enq:TX - row lock contention
>
> 2. enq:TX - index contention
>
> 3. enq:TX - ITL
>
> 4. enq:TX - contention
>
>
>
> I know the first three ones' meanings.
>
>
>
> But what does the last one "enq:TX - contention" mean? I know it means
> other TX enqueue types. But what's the *other* TX enqueues?
>
>
>
> Could anybody give me some examples? We have insert sql causes this TX
> contention.
>
>
>
> I searched metalink and oracle-l, but most doc/threads are discussing the
> first three ones.
>
>
>
> Thanks a lot.
>
> --
> Eagle Fan
>
> Oracle DBA
>
>
>
>
> --
> Eagle Fan
>
> Oracle DBA
>

-- 
Eagle Fan

Oracle DBA

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