Oracle-L: RE: cant set multiblock read count

From: <John.Hallas_at_vodafone.co.uk>
Date: Tue, 12 Nov 2002 04:18:40 -0800
Message-ID: <F001.00500BB9.20021112041840@fatcity.com>

Rahul,
I believe there is an O/S maximum setting of this parameter to be 64K (this covers AIX and HP and and may affect others) This fits in with your finding so I am sure it is correct

John
-----Original Message-----
Sent: 12 November 2002 09:11
To: Multiple recipients of list ORACLE-L

list !!
my ora7.3.2 instance on AIX with a db_block_size of 4k has a multi block read count of 16 !!

i thought i would create a new instance with a block size of 8k, so i can set
the max multiblock read count to more than 16, BUT, after creating the new instance
the db_multiblock_read_count *always* defaults to 8 !!

here the new instance params

db_files = 16
db_file_multiblock_read_count = 32
db_block_buffers = 3840
db_file_simultaneous_writes = 8
db_block_lru_latches = 8

shared_pool_size = 31457280

which of these parameter is affecting the value of multiblock read count ???

TIA
Rahul

PS: i hv checked the multiblock reads using ixora script... always 8 !!

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Author: Rahul
INET: rahul_at_ratelindo.co.id

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RE: cant set multiblock read count > 8 !!!