MULTI-LOCK IO

Hi All,

I have few doubts on Multiblock IO.

I have a DB which runs on mixed load i.e., OLTP & DSS. We have few big
tables which require FTS for
reporting and other relatively smaller tables need indexed access. Our DB
block size is 8K.

My queries are:

1> If I set db_file_multiblock_read_count=128 (MAX_IO_SIZE=1M) then the
optimizer may choose FTS
for the other queries as well. Can I set optimizer_index_cost_adj=10 to
influence/override the FTS
decission?

2> Is it a good idea to set db_file_multiblock_read_count=128 at the session
level wherever FTS is
required?

3> Will the system statistics override the db_file_multiblock_read_count
settings?

Please help me on this.

-- 
Regards,

Deepak
Oracle DBA

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