RE: Number of Transaction Slots

To give credit where credit is due, this came from my friend K Gopalakrishnan...

The transaction slots are visible as KTUXESLT in X$KTUXE. We can get the number of transaction slots in the rollback segments by

select count(*) ktuxeslt from X$ktuxe group by ktuxeusn;

The # of transaction slots are determined by the database block size.

RF

Robert G. Freeman - Oracle8i OCP
Oracle DBA Technical Lead
CSX Midtier Database Administration

The Cigarette Smoking Man: Anyone who can appease a man's conscience can take his freedom away from him.

-----Original Message-----
Sent: Thursday, March 07, 2002 3:04 PM
To: Multiple recipients of list ORACLE-L

I believe someone else had asked this question before, but I did not see a reply. Does anyone know the number of transaction slots in the rollback segment header for block sizes of 4k, 8k, et all?

>From what I have read, for a block size of 2K, its 21 transaction slots.
(Steve Adams at www.ixora.com.au)
For a block size of 8K, its 98 (Jonathan Lewis on Metalink - For 8.1.6)

As per Metalink:

2K - 31
4K - 67
8K - 140

Different answers? What does it depend on? OS Version, Oracle Version, number of extents in rollback segment??

Regards
Raj        

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