Multiple size of db_block

using oracle 10g on solaris.
I have a query with lots of join and some table scan with lob object.
when i execute that with 8K block size..then after executing 3 times ,I got physical read 0.
but I moved them in a 16K block size.and physical read is not reduced. its always 23000 to 25000.
so ..what can I do to reduce the physical read?

Hi,
of course it will not reduced.
Because you are only changing the block size where the data is going to be
stored.That does not means that it is going to reduce the physical read.
If you want then either increase the buffer cache size or reduce the
full table scans.
thanks

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