Re: enq: TX - index contention
- From: "jaromir nemec" <jaromir@xxxxxxxxxxxx>
- To: <mark.powell@xxxxxxx>, <Les.Hollis@xxxxxx>, <oracle-l@xxxxxxxxxxxxx>
- Date: Tue, 22 Mar 2005 22:46:51 +0100
Hi,
>My initial test showed I requested 1 ITL and 4 blocks. I got 4 blocks with
two ITL slots in them.
This behaviour is a bit more than I understand under "default"; wouldn't be
more correct to say, that the allowed range was changed as well?.
> But anybody who looks at the block dump knows better.
I strong skeptic would argue that this is only other presentation of the
metadata. The best test IMHO is simple to stress a block with two parallel
transactions and observe if the concurrency takes place.
If I recall it correctly there is a paper on this topic from Arup Nanda on
dbazine (unfortunately not online currently) and for sure lot of other stuff
else.
Regards
Jaromir D.B. Nemec
----- Original Message -----
From: "Powell, Mark D" <mark.powell@xxxxxxx>
To: <Les.Hollis@xxxxxx>; <oracle-l@xxxxxxxxxxxxx>
Sent: Tuesday, March 22, 2005 8:21 PM
Subject: RE: enq: TX - index contention
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