Database Tuning (MOSC)

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datafile io distribution problem

edited Aug 1, 2012 4:09AM in Database Tuning (MOSC) 10 commentsAnswered
Hi,

I run a database health check using TOAD 11 and found we have datafile I/O distribution problem for all production database instances. The follwing is one of them.

 

== % Phys % Phys                                                             ==

==  Reads Writes  Tablespace Name                 Datafile Name              ==

===============================================================================

    66.49  36.92  TAX_DATA                        D:\ORACLE\DB10GR2_FLX_P1\ORADATA\FLEXPROD\TAX_DATA.DBF

The disk we have is drive C RAID 1 drive D RAID 5 and drive E RAID 1.

most of data files are on drive D using OS stripping of RAID 5. only one tablespace with one data file which is 20G on drive D and another index tablespace with one data file on drive E.

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