--運行環境 SQL> select * from v$version where rownum<2;
BANNER ---------------------------------------------------------------- Oracle Database 10g Release 10.2.0.3.0 - 64bit Production
--獲得當前數據庫索引的使用頻率 SQL> @idx_usage_detail.sql Enter value for 1: GO_ADMIN Enter value for 2: 100 Index Table name Index name Index type Size MB Index operation Executions ------------------------------ ------------------------------ ------------ ----------- --------------------- ---------- ACC_POS_CASH_PL_TBL_ARC PK_ACC_POS_CASH_PL_ARCH_TBL NORMAL 3,328.00 RANGE SCAN 99 SAMPLE FAST FULL SCAN 8 UNIQUE SCAN 3 SKIP SCAN 2 ****************************** ****************************** ************ ----------- ---------- sum 13,312.00 112
ACC_POS_CASH_TBL_ARC PK_ACC_POS_CASH_ARCH_TBL NORMAL 2,560.00 RANGE SCAN 168 UNIQUE SCAN 14 SAMPLE FAST FULL SCAN 12 SKIP SCAN 1 ****************************** ****************************** ************ ----------- ---------- sum 10,240.00 195
ACC_POS_HIST_TBL ACC_HIST_TRANS_DATE_IDX NORMAL 384.00 RANGE SCAN 917 SKIP SCAN 210 SAMPLE FAST FULL SCAN 4 FAST FULL SCAN 1 PK_ACC_POS_HIST_TBL NORMAL 192.00 UNIQUE SCAN 7 SAMPLE FAST FULL SCAN 3 TRANS_NUM_IDX NORMAL 232.00 RANGE SCAN 41 SAMPLE FAST FULL SCAN 3 FAST FULL SCAN 1 ****************************** ****************************** ************ ----------- ---------- sum 2,616.00 1,187
ACC_POS_INT_TBL ACC_POS_INT_10DIG_IDX FUNCTION- 2,622.00 RANGE SCAN 59 BASED NORMAL
SAMPLE FAST FULL SCAN 4 FAST FULL SCAN 2 PK_ACC_POS_INT_TBL NORMAL 2,496.00 RANGE SCAN 65 FAST FULL SCAN 53 UNIQUE SCAN 14 SKIP SCAN 13 SAMPLE FAST FULL SCAN 1 ****************************** ****************************** ************ ----------- ---------- sum 20,346.00 211
ACC_POS_STOCK_TBL_ARC PK_ACC_POS_STOCK_ARCH_TBL NORMAL 18,977.00 RANGE SCAN 177 SAMPLE FAST FULL SCAN 10 UNIQUE SCAN 4 SKIP SCAN 3 ****************************** ****************************** ************ ----------- ---------- sum 75,908.00 194
STK_TBL_ARC PK_STK_ARCH_TBL NORMAL 920.00 RANGE SCAN 126 UNIQUE SCAN 38 SKIP SCAN 17 SAMPLE FAST FULL SCAN 2 ****************************** ****************************** ************ ----------- ---------- sum 3,680.00 183
STK_TBL_LOG PK_STK_TBL_LOG NORMAL 480.00 UNIQUE SCAN 56 ****************************** ****************************** ************ ----------- ---------- sum 480.00 56
TRADE_BROKER_CHRG_TBL_ARC PK_TRADE_BROKER_CHRG_TBL_ARC NORMAL 128.00 - 0 UNI_TDBK_CHRG_ARC NORMAL 104.00 RANGE SCAN 283 ****************************** ****************************** ************ ----------- ---------- sum 232.00 283
TRADE_BROKER_JOURNAL_TBL_ARC IDX_TDBK_JRNL_ARC_ENTRY_DT NORMAL 168.00 - 0 IDX_TDBK_JRNL_ARC_INSTRU_ID NORMAL 144.00 FULL SCAN 1 IDX_TDBK_JRNL_ARC_STOCK_CD NORMAL 144.00 FULL SCAN 1 IDX_TDBK_JRNL_ARC_TRADED_PRICE NORMAL 144.00 FULL SCAN 1 PK_TRADE_BROKER_JOURNAL_ARC NORMAL 200.00 - 0 ****************************** ****************************** ************ ----------- ---------- sum 800.00 3
TRADE_CLIENT_CHRG_TBL_ARC IDX_TDCL_CHRG_ARC_GRP_REF_ID NORMAL 704.00 RANGE SCAN 3,537 PK_TRADE_CLIENT_CHRG_TBL_ARC NORMAL 1,539.00 RANGE SCAN 24 SAMPLE FAST FULL SCAN 2 UNI_TDCL_CHRG_ARC NORMAL 1,216.00 RANGE SCAN 1,103 FAST FULL SCAN 3 SAMPLE FAST FULL SCAN 2 ****************************** ****************************** ************ ----------- ---------- sum 7,430.00 4,671
TRADE_CLIENT_DTL_TBL_ARC IDX_TDCL_DTL_ARC_ACTION_N_STUS NORMAL 312.00 - 0 IDX_TDCL_DTL_ARC_ACT_TD_PRICE NORMAL 184.00 FULL SCAN 1 IDX_TDCL_DTL_ARC_REF_ID NORMAL 344.00 RANGE SCAN 4,623 FAST FULL SCAN 1 FULL SCAN 1 IDX_TDCL_DTL_ARC_TRADED_PRICE NORMAL 184.00 - 0 PK_TRADE_CLIENT_DTL_TBL_ARC NORMAL 432.00 - 0 UNI_TDCL_DTL_ARC_TRADE_DTL_ID NORMAL 272.00 - 0 ****************************** ****************************** ************ ----------- ---------- sum 2,416.00 4,626
TRADE_CLIENT_TBL_ARC IDX_TDCL_ARC_ACC_NUM NORMAL 152.00 RANGE SCAN 534 IDX_TDCL_ARC_GRP_REF_ID NORMAL 120.00 RANGE SCAN 550 FAST FULL SCAN 1 IDX_TDCL_ARC_INPUT_DATE NORMAL 120.00 RANGE SCAN 7,231 IDX_TDCL_ARC_PL_STK NORMAL 144.00 SKIP SCAN 156 RANGE SCAN 3 FULL SCAN 1 IDX_TDCL_ARC_TRADE_DATE NORMAL 120.00 RANGE SCAN 12,778 PK_TRADE_CLIENT_TBL_ARC NORMAL 160.00 RANGE SCAN 37 UNI_TDCL_ARC_REF_ID NORMAL 112.00 UNIQUE SCAN 157 FAST FULL SCAN 8 SAMPLE FAST FULL SCAN 1 ****************************** ****************************** ************ ----------- ---------- sum 1,560.00 21,457
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 = '&&1' AND I.OWNER = '&&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 4、補充說明 腳本使用了2個替代變量，一個是schema，一個是索引的大小。缺省情況下，對于那些較小的索引以及僅僅運行一至兩次的sql語句的歷史執行計劃不會被收集到DBA_HIST_SQL_PLAN。因此執行腳本時索引大小輸入的建議值是100。如果需要收集所有的歷史sql執行計劃來判斷索引是否被使用，需要修改statistics_level為all或者修改snapshot的收集策略。收集策略對系統性能有一定的影響，以及耗用大量磁盤空間，因此Prod環境應慎用(UAT和DEV則無妨)。
