Dout in MBRC

Today I have read db_multiblock_read_count paramater
while reading there is formula for setting the vlaue for this parameter.
max os io chunk size/db_block_size
How to find the i/o chunk size in Linux 4.0 ?
dont tell me from 10.2 release this parameter is automatic.
Thanks
Sanat

And here it is sql writen by Sir Steve Adams :
http://www.ixora.com.au/scripts/sql/multiblock_read_test.sql
This will tell you the maximum effective setting for db_file_multiblock_read_count is OS and disk. This script conducts a test and sample actual I/O chunk sizes on your server to aid you in setting db_file_multiblock_read_count.
Now, if you wish to get the "io chunk size in Linux" then :
So, I guess it depends on OS block size, filesystem type i.e. ext2,ext3 etc., storage devices, OS type i.e. 32 bit or 64 bit, RAID levels, LVM etc. i.e. stuff for network / OS admin.
So, I think above .sql will do all for you in a one go.
Regards
Girish Sharma

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    SQL> select * from v$version;
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    SYSSTATS_INFO                  DSTOP                                     11-09-2009 04:59
    SYSSTATS_INFO                  FLAGS                                   1
    SYSSTATS_MAIN                  CPUSPEEDNW                     128.239557
    SYSSTATS_MAIN                  IOSEEKTIM                              10
    SYSSTATS_MAIN                  IOTFRSPEED                           4096
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    8     SYSSTATS_MAIN     SREADTIM     0,415     
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    >
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    ALV Documentation for Field
    http://www.mpls.k12.mn.us/sites/f7071225-9844-4da6-96c0-996b9c74b221/uploads/SAP_Navigation_Training2.ppt
    Regards,
    Santosh

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