Dump Completed -
72019 hash chains listed
--
Jonathan Lewis
Yet another Oracle-related web site: http://www.jlcomp.demon.co.uk
Practical Oracle 8i: Building Efficient Databases
Publishers: Addison-Wesley
Reviews at: http://www.jlcomp.demon.co.uk/book_rev.html
Jonathan Lewis wrote in message
<992636594.17653.0.nnrp-10.9e984b29_at_news.demon.co.uk>...
>
>My first thought was that this was perhaps one of
>those odd 'boundary limit' calculations, or a platform
>dependent feature, so I've bounced by HP with a 36,000
>block buffer and started to dump the buffer chains.
>
>I've just realised though that you meant the x$ksppi
>query, not the 'alter session' "query".
>
>There are several places where Oracle takes a supplied
>init.ora parameter, and then adjusts it to suit. In this case
>I think we'll find that the parameter _db_hash_buckets is
>first generated as a simple multiple of db_block_buffers,
>and then adjusted upward to a prime when the instance
>starts. I'll let you know when the dump completes -
>it's having a bit of a problem because of the number of
>buffers, and the fact that there seems to be a bug that
>increases the dump size whenever Oracle hits an
>unused buffer (and since I've just bounced the database ...)
>
>
>--
>Jonathan Lewis
>Yet another Oracle-related web site: http://www.jlcomp.demon.co.uk
>
>Practical Oracle 8i: Building Efficient Databases
>Publishers: Addison-Wesley
>
>Reviews at: http://www.jlcomp.demon.co.uk/book_rev.html
>
>
>
>Rob K wrote in message ...
>>I did a check using your query and my _db_block_hash_buckets = 72000
>>which = 2*db_block_buffers = 36000
>>not the next prime of 72000
>>which is 72019
>>
>>I am running 8.1.7.0 on Sun
>>I heard there is a patch release to bring me
>>up to 8.1.7.1
>>
>>
>
>
>
Received on Thu Jun 14 2001 - 16:12:09 CDT
