build list all indexes usage and fragmentation

Hello,

I search a script for build a list containing all indexes usage and fragmentation.

Thanks

Regards
bibi92Asked:
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
I suggest you start reading at this page for the index fragmentation stuff, which is not a "simple" query, but rather guidelines:
http://www.dba-oracle.com/t_script_identify_index_fragmentation.htm

about the used (unused) indexes:
http://www.dba-oracle.com/oracle_tips_unused_indexes.htm
below the part that I am using from there
 Finding unused indexes on Oracle

One of the great features of Oracleis the ability to easily locate and remove unused indexes.  When an index is not used by SQL queries with the cost-based optimizer, the unused indexes waste space and cause INSERT statements to run slower.

When you issue the alter index <index_name> monitoring usage command, Oracle places an entry in the v$object_usage view so you can see if the index is used.  This is just a bit-flag that is set to “1” when the index is accessed by any SQL statement.

Here is a simple SQL*Plus script to track all index usage in all Oracle schemas:

    set pages 999;
    set heading off;
    spool run_monitor.sql

    select
       'alter index '||owner||'.'||index_name||' monitoring usage;'
    from
       dba_indexes
    where
       owner not in ('SYS','SYSTEM','PERFSTAT')
    ;

    spool off;

    @run_monitor

Next, we wait until a significant amount of SQL has executed on our database, and then query the new v$object_usage view:

    select
       index_name
       mon,
       used
    from
       v$object_usage;

Here we see that v$object_usage has a single column called used, which will be set to YES or NO.  Sadly, this will not tell you how many times the index has been used, but this tool is useful for investigating unused indexes.

    INDEX_NAME              MON USED
    ---------------         --- ----
    CUSTOMER_LAST_NAME_IDX  YES  NO  

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