轉載自:
http://blog.csdn.net/leshami/article/details/8823133

set linesize 140
set pagesize 160

clear breaks
clear computes

break on TABLE_NAME skip 2 ON INDEX_NAME ON INDEX_TYPE ON MB
compute sum of NR_EXEC on TABLE_NAME SKIP 2
compute sum of MB on TABLE_NAME SKIP 2

SET TIMI OFF
set linesize 140
set pagesize 10000
set verify off
col OWNER noprint
col TABLE_NAME for a30 heading 'Table name'
col INDEX_NAME for a30 heading 'Index name'
col INDEX_TYPE for a15 heading 'Index type'
col INDEX_OPERATION for a21 Heading 'Index operation'
col NR_EXEC for 9G999G990 heading 'Executions'
col MB for 999G990D90 Heading 'Index|Size MB' justify right

WITH Q AS (
SELECT
S.OWNER A_OWNER,
TABLE_NAME A_TABLE_NAME,
INDEX_NAME A_INDEX_NAME,
INDEX_TYPE A_INDEX_TYPE,
SUM(S.bytes) / 1048576 A_MB
FROM DBA_SEGMENTS S,
DBA_INDEXES I
WHERE S.OWNER = upper('&&1')
AND I.OWNER = upper('&&1')
AND INDEX_NAME = SEGMENT_NAME
GROUP BY S.OWNER, TABLE_NAME, INDEX_NAME, INDEX_TYPE
HAVING SUM(S.BYTES) > 1048576 * &&2
)
SELECT /*+ NO_QUERY_TRANSFORMATION(S) */
A_OWNER OWNER,
A_TABLE_NAME TABLE_NAME,
A_INDEX_NAME INDEX_NAME,
A_INDEX_TYPE INDEX_TYPE,
A_MB MB,
DECODE (OPTIONS, null, ' -',OPTIONS) INDEX_OPERATION,
COUNT(OPERATION) NR_EXEC
FROM Q,
DBA_HIST_SQL_PLAN d
WHERE
D.OBJECT_OWNER(+)= q.A_OWNER AND
D.OBJECT_NAME(+) = q.A_INDEX_NAME
GROUP BY
A_OWNER,
A_TABLE_NAME,
A_INDEX_NAME,
A_INDEX_TYPE,
A_MB,
DECODE (OPTIONS, null, ' -',OPTIONS)
ORDER BY
A_OWNER,
A_TABLE_NAME,
A_INDEX_NAME,
A_INDEX_TYPE,
A_MB DESC,
NR_EXEC DESC
;

PROMPT "Showed only indexes in &&1 schema whose size > &&2 MB in period:"

SET HEAD OFF;
select to_char (min(BEGIN_INTERVAL_TIME), 'DD.MM.YYYY')
|| '-' ||
to_char (max(END_INTERVAL_TIME), 'DD.MM.YYYY')
from dba_hist_snapshot;

SET HEAD ON
SET TIMI ON

http://blog.itpub.net/29254281/viewspace-1067050/
相對於索引監控,不僅可以看到索引是否使用
更可以看到使用該索引的步驟的數量,十分直觀

Oracle 監控索引的使用率

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