一个表空间使用率查询sql的优化

时间：2017-05-20 22:37:57 阅读：241 评论：0 收藏：0 [点我收藏+]

标签：range varchar lte use_nl count dba mod 2.0 rom

话不多说，直接上运行计划：

SQL> set lines 500;
SQL> set pagesize 9999;
SQL> set long 9999;
SQL> select * from table(dbms_xplan.display_cursor('41348610',null,'advanced'));

PLAN_TABLE_OUTPUT
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
HASH_VALUE  41348610, child number 0
------------------------------------
 SELECT D.TABLESPACE_NAME,         SPACE "Total(M)",         SPACE -
NVL(FREE_SPACE, 0) "USED(M)",         ROUND((1 - NVL(FREE_SPACE, 0) /
SPACE) * 100, 2) "USED(%)",         FREE_SPACE "FREE(M)"    FROM
(SELECT TABLESPACE_NAME,                 ROUND(SUM(BYTES) / (1024 *
1024), 2) SPACE,                 SUM(BLOCKS) BLOCKS            FROM
DBA_DATA_FILES           GROUP BY TABLESPACE_NAME) D,         (SELECT
TABLESPACE_NAME,                 ROUND(SUM(BYTES) / (1024 * 1024), 2)
FREE_SPACE            FROM DBA_FREE_SPACE           GROUP BY
TABLESPACE_NAME) F   WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
UNION ALL --if have tempfile  SELECT D.TABLESPACE_NAME,         SPACE
"Total(M)",         USED_SPACE "USED(M)",         ROUND(NVL(USED_SPACE,
0) / SPACE * 100, 2) "USED(%)",         NVL(FREE_SPACE, 0) "FREE(M)"
FROM (SELECT TABLESPACE_NAME,                 ROUND(SUM(BYTES) / (1024
* 1024), 2) SPACE,                 SUM(BLOCKS) BLOCKS            FROM
DBA_TEMP_FILES           GROUP BY T

Plan hash value: 3967328987

----------------------------------------------------------------------------------------------------------
| Id  | Operation                             | Name             | Rows  | Bytes | Cost (%CPU)| Time     |
----------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                      |                  |       |       |    20 (100)|          |
|   1 |  SORT ORDER BY                        |                  |     3 |   178 |    19  (22)| 00:00:01 |
|   2 |   UNION-ALL                           |                  |       |       |            |          |
|*  3 |    HASH JOIN OUTER                    |                  |     2 |   120 |    16  (19)| 00:00:01 |
|   4 |     VIEW                              |                  |     2 |    60 |     5  (20)| 00:00:01 |
|   5 |      HASH GROUP BY                    |                  |     2 |    68 |     5  (20)| 00:00:01 |
|   6 |       VIEW                            | DBA_DATA_FILES   |     2 |    68 |     4   (0)| 00:00:01 |
|   7 |        UNION-ALL                      |                  |       |       |            |          |
|   8 |         NESTED LOOPS                  |                  |     1 |   356 |     2   (0)| 00:00:01 |
|   9 |          NESTED LOOPS                 |                  |     1 |   341 |     1   (0)| 00:00:01 |
|  10 |           NESTED LOOPS                |                  |     1 |   328 |     1   (0)| 00:00:01 |
|* 11 |            FIXED TABLE FULL           | X$KCCFN          |     1 |   310 |     0   (0)|          |
|* 12 |            TABLE ACCESS BY INDEX ROWID| FILE$            |     1 |    18 |     1   (0)| 00:00:01 |
|* 13 |             INDEX UNIQUE SCAN         | I_FILE1          |     1 |       |     0   (0)|          |
|* 14 |           FIXED TABLE FIXED INDEX     | X$KCCFE (ind:1)  |    20 |   260 |     0   (0)|          |
|  15 |          TABLE ACCESS CLUSTER         | TS$              |     1 |    15 |     1   (0)| 00:00:01 |
|* 16 |           INDEX UNIQUE SCAN           | I_TS#            |     1 |       |     0   (0)|          |
|  17 |         NESTED LOOPS                  |                  |     1 |   399 |     2   (0)| 00:00:01 |
|  18 |          NESTED LOOPS                 |                  |     1 |   386 |     2   (0)| 00:00:01 |
|  19 |           NESTED LOOPS                |                  |     1 |   377 |     1   (0)| 00:00:01 |
|  20 |            NESTED LOOPS               |                  |     1 |   362 |     0   (0)|          |
|* 21 |             FIXED TABLE FULL          | X$KCCFN          |     1 |   310 |     0   (0)|          |
|* 22 |             FIXED TABLE FIXED INDEX   | X$KTFBHC (ind:1) |     1 |    52 |     0   (0)|          |
|  23 |            TABLE ACCESS CLUSTER       | TS$              |     1 |    15 |     1   (0)| 00:00:01 |
|* 24 |             INDEX UNIQUE SCAN         | I_TS#            |     1 |       |     0   (0)|          |
|* 25 |           TABLE ACCESS BY INDEX ROWID | FILE$            |     1 |     9 |     1   (0)| 00:00:01 |
|* 26 |            INDEX UNIQUE SCAN          | I_FILE1          |     1 |       |     0   (0)|          |
|* 27 |          FIXED TABLE FIXED INDEX      | X$KCCFE (ind:1)  |    20 |   260 |     0   (0)|          |
|  28 |     VIEW                              |                  |     5 |   150 |    11  (19)| 00:00:01 |
|  29 |      HASH GROUP BY                    |                  |     5 |   105 |    11  (19)| 00:00:01 |
|  30 |       VIEW                            | DBA_FREE_SPACE   |    79 |  1659 |    10  (10)| 00:00:01 |
|  31 |        UNION-ALL                      |                  |       |       |            |          |
|  32 |         NESTED LOOPS                  |                  |     1 |    64 |     1   (0)| 00:00:01 |
|  33 |          NESTED LOOPS                 |                  |     1 |    45 |     1   (0)| 00:00:01 |
|  34 |           INDEX FULL SCAN             | I_FILE2          |     5 |    30 |     1   (0)| 00:00:01 |
|* 35 |           TABLE ACCESS CLUSTER        | FET$             |     1 |    39 |     0   (0)|          |
|* 36 |            INDEX UNIQUE SCAN          | I_TS#            |     1 |       |     0   (0)|          |
|* 37 |          TABLE ACCESS CLUSTER         | TS$              |     1 |    19 |     0   (0)|          |
|* 38 |           INDEX UNIQUE SCAN           | I_TS#            |     1 |       |     0   (0)|          |
|  39 |         NESTED LOOPS                  |                  |    76 |  5320 |     4   (0)| 00:00:01 |
|  40 |          NESTED LOOPS                 |                  |    76 |  4864 |     4   (0)| 00:00:01 |
|* 41 |           TABLE ACCESS FULL           | TS$              |     5 |   125 |     4   (0)| 00:00:01 |
|* 42 |           FIXED TABLE FIXED INDEX     | X$KTFBFE (ind:1) |    17 |   663 |     0   (0)|          |
|* 43 |          INDEX UNIQUE SCAN            | I_FILE2          |     1 |     6 |     0   (0)|          |
|  44 |         NESTED LOOPS                  |                  |     1 |   135 |     2  (50)| 00:00:01 |
|  45 |          NESTED LOOPS                 |                  |     1 |    70 |     1   (0)| 00:00:01 |
|  46 |           NESTED LOOPS                |                  |     1 |    45 |     1   (0)| 00:00:01 |
|  47 |            INDEX FULL SCAN            | I_FILE2          |     5 |    30 |     1   (0)| 00:00:01 |
|  48 |            TABLE ACCESS BY INDEX ROWID| RECYCLEBIN$      |     1 |    39 |     0   (0)|          |
|* 49 |             INDEX RANGE SCAN          | RECYCLEBIN$_TS   |     1 |       |     0   (0)|          |
|* 50 |           TABLE ACCESS CLUSTER        | TS$              |     1 |    25 |     0   (0)|          |
|* 51 |            INDEX UNIQUE SCAN          | I_TS#            |     1 |       |     0   (0)|          |
|* 52 |          FIXED TABLE FIXED INDEX      | X$KTFBUE (ind:1) |     1 |    65 |     1 (100)| 00:00:01 |
|  53 |         NESTED LOOPS                  |                  |     1 |   116 |     3   (0)| 00:00:01 |
|  54 |          NESTED LOOPS                 |                  |     1 |    97 |     3   (0)| 00:00:01 |
|  55 |           MERGE JOIN CARTESIAN        |                  |     1 |    45 |     3   (0)| 00:00:01 |
|  56 |            TABLE ACCESS FULL          | RECYCLEBIN$      |     1 |    39 |     2   (0)| 00:00:01 |
|  57 |            BUFFER SORT                |                  |     5 |    30 |     1   (0)| 00:00:01 |
|  58 |             INDEX FULL SCAN           | I_FILE2          |     5 |    30 |     1   (0)| 00:00:01 |
|  59 |           TABLE ACCESS CLUSTER        | UET$             |     1 |    52 |     0   (0)|          |
|* 60 |            INDEX UNIQUE SCAN          | I_FILE#_BLOCK#   |     1 |       |     0   (0)|          |
|* 61 |          TABLE ACCESS CLUSTER         | TS$              |     1 |    19 |     0   (0)|          |
|* 62 |           INDEX UNIQUE SCAN           | I_TS#            |     1 |       |     0   (0)|          |
|  63 |    NESTED LOOPS OUTER                 |                  |     1 |    58 |     3  (34)| 00:00:01 |
|  64 |     VIEW                              |                  |     1 |    30 |     2  (50)| 00:00:01 |
|  65 |      HASH GROUP BY                    |                  |     1 |   416 |     2  (50)| 00:00:01 |
|  66 |       NESTED LOOPS                    |                  |     1 |   416 |     1   (0)| 00:00:01 |
|  67 |        NESTED LOOPS                   |                  |     1 |   364 |     1   (0)| 00:00:01 |
|  68 |         NESTED LOOPS                  |                  |     1 |   349 |     0   (0)|          |
|* 69 |          FIXED TABLE FULL             | X$KCCFN          |     1 |   297 |     0   (0)|          |
|* 70 |          FIXED TABLE FIXED INDEX      | X$KTFTHC (ind:1) |     1 |    52 |     0   (0)|          |
|  71 |         TABLE ACCESS CLUSTER          | TS$              |     1 |    15 |     1   (0)| 00:00:01 |
|* 72 |          INDEX UNIQUE SCAN            | I_TS#            |     1 |       |     0   (0)|          |
|* 73 |        FIXED TABLE FIXED INDEX        | X$KCCTF (ind:1)  |     1 |    52 |     0   (0)|          |
|  74 |     VIEW PUSHED PREDICATE             |                  |     1 |    28 |     1   (0)| 00:00:01 |
|  75 |      SORT GROUP BY                    |                  |     1 |    90 |     1   (0)| 00:00:01 |
|  76 |       NESTED LOOPS                    |                  |     1 |    90 |     1   (0)| 00:00:01 |
|* 77 |        TABLE ACCESS BY INDEX ROWID    | TS$              |     1 |    25 |     1   (0)| 00:00:01 |
|* 78 |         INDEX UNIQUE SCAN             | I_TS1            |     1 |       |     0   (0)|          |
|* 79 |        FIXED TABLE FIXED INDEX        | X$KTFTHC (ind:2) |     1 |    65 |     0   (0)|          |
----------------------------------------------------------------------------------------------------------

Query Block Name / Object Alias (identified by operation id):
-------------------------------------------------------------

   1 - SET$1
   3 - SEL$1
   4 - SEL$2        / D@SEL$1
   5 - SEL$2
   6 - SET$2        / DBA_DATA_FILES@SEL$2
   7 - SET$2
   8 - SEL$C8360722
  11 - SEL$C8360722 / X$KCCFN@SEL$5
  12 - SEL$C8360722 / F@SEL$3
  13 - SEL$C8360722 / F@SEL$3
  14 - SEL$C8360722 / FE@SEL$3
  15 - SEL$C8360722 / TS@SEL$3
  16 - SEL$C8360722 / TS@SEL$3
  17 - SEL$A731BD80
  21 - SEL$A731BD80 / X$KCCFN@SEL$8
  22 - SEL$A731BD80 / HC@SEL$6
  23 - SEL$A731BD80 / TS@SEL$6
  24 - SEL$A731BD80 / TS@SEL$6
  25 - SEL$A731BD80 / F@SEL$6
  26 - SEL$A731BD80 / F@SEL$6
  27 - SEL$A731BD80 / FE@SEL$6
  28 - SEL$9        / F@SEL$1
  29 - SEL$9
  30 - SET$3        / DBA_FREE_SPACE@SEL$9
  31 - SET$3
  32 - SEL$10
  34 - SEL$10       / FI@SEL$10
  35 - SEL$10       / F@SEL$10
  36 - SEL$10       / F@SEL$10
  37 - SEL$10       / TS@SEL$10
  38 - SEL$10       / TS@SEL$10
  39 - SEL$11
  41 - SEL$11       / TS@SEL$11
  42 - SEL$11       / F@SEL$11
  43 - SEL$11       / FI@SEL$11
  44 - SEL$12
  47 - SEL$12       / FI@SEL$12
  48 - SEL$12       / RB@SEL$12
  49 - SEL$12       / RB@SEL$12
  50 - SEL$12       / TS@SEL$12
  51 - SEL$12       / TS@SEL$12
  52 - SEL$12       / U@SEL$12
  53 - SEL$13
  56 - SEL$13       / RB@SEL$13
  58 - SEL$13       / FI@SEL$13
  59 - SEL$13       / U@SEL$13
  60 - SEL$13       / U@SEL$13
  61 - SEL$13       / TS@SEL$13
  62 - SEL$13       / TS@SEL$13
  63 - SEL$14
  64 - SEL$29F99543 / D@SEL$14
  65 - SEL$29F99543
  69 - SEL$29F99543 / V@SEL$16
  70 - SEL$29F99543 / HC@SEL$16
  71 - SEL$29F99543 / TS@SEL$16
  72 - SEL$29F99543 / TS@SEL$16
  73 - SEL$29F99543 / TF@SEL$16
  74 - SEL$ADB656C7 / F@SEL$14
  75 - SEL$ADB656C7
  77 - SEL$ADB656C7 / TS@SEL$19
  78 - SEL$ADB656C7 / TS@SEL$19
  79 - SEL$ADB656C7 / HC@SEL$19

Outline Data
-------------

  /*+
      BEGIN_OUTLINE_DATA
      IGNORE_OPTIM_EMBEDDED_HINTS
      OPTIMIZER_FEATURES_ENABLE('11.2.0.4')
      DB_VERSION('11.2.0.4')
      ALL_ROWS
      OUTLINE_LEAF(@"SEL$C8360722")
      MERGE(@"SEL$7286615E")
      OUTLINE_LEAF(@"SEL$A731BD80")
      MERGE(@"SEL$8A3193DA")
      OUTLINE_LEAF(@"SET$2")
      OUTLINE_LEAF(@"SEL$2")
      OUTLINE_LEAF(@"SEL$10")
      OUTLINE_LEAF(@"SEL$11")
      OUTLINE_LEAF(@"SEL$12")
      OUTLINE_LEAF(@"SEL$13")
      OUTLINE_LEAF(@"SET$3")
      OUTLINE_LEAF(@"SEL$9")
      OUTLINE_LEAF(@"SEL$1")
      OUTLINE_LEAF(@"SEL$29F99543")
      MERGE(@"SEL$16")
      OUTLINE_LEAF(@"SEL$ADB656C7")
      PUSH_PRED(@"SEL$14" "F"@"SEL$14" 1)
      OUTLINE_LEAF(@"SEL$14")
      OUTLINE_LEAF(@"SET$1")
      OUTLINE(@"SEL$3")
      OUTLINE(@"SEL$7286615E")
      MERGE(@"SEL$5")
      OUTLINE(@"SEL$6")
      OUTLINE(@"SEL$8A3193DA")
      MERGE(@"SEL$8")
      OUTLINE(@"SEL$15")
      OUTLINE(@"SEL$16")
      OUTLINE(@"SEL$E9CE8D49")
      MERGE(@"SEL$07C48A2D")
      OUTLINE(@"SEL$14")
      OUTLINE(@"SEL$4")
      OUTLINE(@"SEL$5")
      OUTLINE(@"SEL$7")
      OUTLINE(@"SEL$8")
      OUTLINE(@"SEL$17")
      OUTLINE(@"SEL$07C48A2D")
      MERGE(@"SEL$19")
      OUTLINE(@"SEL$18")
      OUTLINE(@"SEL$19")
      NO_ACCESS(@"SEL$14" "D"@"SEL$14")
      NO_ACCESS(@"SEL$14" "F"@"SEL$14")
      LEADING(@"SEL$14" "D"@"SEL$14" "F"@"SEL$14")
      USE_NL(@"SEL$14" "F"@"SEL$14")
      NO_ACCESS(@"SEL$1" "D"@"SEL$1")
      NO_ACCESS(@"SEL$1" "F"@"SEL$1")
      LEADING(@"SEL$1" "D"@"SEL$1" "F"@"SEL$1")
      USE_HASH(@"SEL$1" "F"@"SEL$1")
      NO_ACCESS(@"SEL$2" "DBA_DATA_FILES"@"SEL$2")
      USE_HASH_AGGREGATION(@"SEL$2")
      NO_ACCESS(@"SEL$9" "DBA_FREE_SPACE"@"SEL$9")
      USE_HASH_AGGREGATION(@"SEL$9")
      FULL(@"SEL$13" "RB"@"SEL$13")
      INDEX(@"SEL$13" "FI"@"SEL$13" ("FILE$"."TS#" "FILE$"."RELFILE#"))
      INDEX(@"SEL$13" "U"@"SEL$13" "I_FILE#_BLOCK#")
      INDEX(@"SEL$13" "TS"@"SEL$13" "I_TS#")
      LEADING(@"SEL$13" "RB"@"SEL$13" "FI"@"SEL$13" "U"@"SEL$13" "TS"@"SEL$13")
      USE_MERGE_CARTESIAN(@"SEL$13" "FI"@"SEL$13")
      USE_NL(@"SEL$13" "U"@"SEL$13")
      USE_NL(@"SEL$13" "TS"@"SEL$13")
      INDEX(@"SEL$12" "FI"@"SEL$12" ("FILE$"."TS#" "FILE$"."RELFILE#"))
      INDEX_RS_ASC(@"SEL$12" "RB"@"SEL$12" ("RECYCLEBIN$"."TS#"))
      INDEX(@"SEL$12" "TS"@"SEL$12" "I_TS#")
      FULL(@"SEL$12" "U"@"SEL$12")
      LEADING(@"SEL$12" "FI"@"SEL$12" "RB"@"SEL$12" "TS"@"SEL$12" "U"@"SEL$12")
      USE_NL(@"SEL$12" "RB"@"SEL$12")
      USE_NL(@"SEL$12" "TS"@"SEL$12")
      USE_NL(@"SEL$12" "U"@"SEL$12")
      FULL(@"SEL$11" "TS"@"SEL$11")
      FULL(@"SEL$11" "F"@"SEL$11")
      INDEX(@"SEL$11" "FI"@"SEL$11" ("FILE$"."TS#" "FILE$"."RELFILE#"))
      LEADING(@"SEL$11" "TS"@"SEL$11" "F"@"SEL$11" "FI"@"SEL$11")
      USE_NL(@"SEL$11" "F"@"SEL$11")
      USE_NL(@"SEL$11" "FI"@"SEL$11")
      INDEX(@"SEL$10" "FI"@"SEL$10" ("FILE$"."TS#" "FILE$"."RELFILE#"))
      INDEX(@"SEL$10" "F"@"SEL$10" "I_TS#")
      INDEX(@"SEL$10" "TS"@"SEL$10" "I_TS#")
      LEADING(@"SEL$10" "FI"@"SEL$10" "F"@"SEL$10" "TS"@"SEL$10")
      USE_NL(@"SEL$10" "F"@"SEL$10")
      USE_NL(@"SEL$10" "TS"@"SEL$10")
      FULL(@"SEL$A731BD80" "X$KCCFN"@"SEL$8")
      FULL(@"SEL$A731BD80" "HC"@"SEL$6")
      INDEX(@"SEL$A731BD80" "TS"@"SEL$6" "I_TS#")
      INDEX_RS_ASC(@"SEL$A731BD80" "F"@"SEL$6" ("FILE$"."FILE#"))
      FULL(@"SEL$A731BD80" "FE"@"SEL$6")
      LEADING(@"SEL$A731BD80" "X$KCCFN"@"SEL$8" "HC"@"SEL$6" "TS"@"SEL$6" "F"@"SEL$6" "FE"@"SEL$6")
      USE_NL(@"SEL$A731BD80" "HC"@"SEL$6")
      USE_NL(@"SEL$A731BD80" "TS"@"SEL$6")
      USE_NL(@"SEL$A731BD80" "F"@"SEL$6")
      USE_NL(@"SEL$A731BD80" "FE"@"SEL$6")
      FULL(@"SEL$C8360722" "X$KCCFN"@"SEL$5")
      INDEX_RS_ASC(@"SEL$C8360722" "F"@"SEL$3" ("FILE$"."FILE#"))
      FULL(@"SEL$C8360722" "FE"@"SEL$3")
      INDEX(@"SEL$C8360722" "TS"@"SEL$3" "I_TS#")
      LEADING(@"SEL$C8360722" "X$KCCFN"@"SEL$5" "F"@"SEL$3" "FE"@"SEL$3" "TS"@"SEL$3")
      USE_NL(@"SEL$C8360722" "F"@"SEL$3")
      USE_NL(@"SEL$C8360722" "FE"@"SEL$3")
      USE_NL(@"SEL$C8360722" "TS"@"SEL$3")
      FULL(@"SEL$29F99543" "V"@"SEL$16")
      FULL(@"SEL$29F99543" "HC"@"SEL$16")
      INDEX(@"SEL$29F99543" "TS"@"SEL$16" "I_TS#")
      FULL(@"SEL$29F99543" "TF"@"SEL$16")
      LEADING(@"SEL$29F99543" "V"@"SEL$16" "HC"@"SEL$16" "TS"@"SEL$16" "TF"@"SEL$16")
      USE_NL(@"SEL$29F99543" "HC"@"SEL$16")
      USE_NL(@"SEL$29F99543" "TS"@"SEL$16")
      USE_NL(@"SEL$29F99543" "TF"@"SEL$16")
      USE_HASH_AGGREGATION(@"SEL$29F99543")
      INDEX_RS_ASC(@"SEL$ADB656C7" "TS"@"SEL$19" ("TS$"."NAME"))
      FULL(@"SEL$ADB656C7" "HC"@"SEL$19")
      LEADING(@"SEL$ADB656C7" "TS"@"SEL$19" "HC"@"SEL$19")
      USE_NL(@"SEL$ADB656C7" "HC"@"SEL$19")
      END_OUTLINE_DATA
  */

Predicate Information (identified by operation id):
---------------------------------------------------

   3 - access("D"."TABLESPACE_NAME"="F"."TABLESPACE_NAME")
  11 - filter(("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
              BITAND("FNFLG",4)<>4))
  12 - filter("F"."SPARE1" IS NULL)
  13 - access("FNFNO"="F"."FILE#")
  14 - filter("FE"."FENUM"="F"."FILE#")
  16 - access("F"."TS#"="TS"."TS#")
  21 - filter(("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
              BITAND("FNFLG",4)<>4))
  22 - filter("FNFNO"="HC"."KTFBHCAFNO")
  24 - access("HC"."KTFBHCTSN"="TS"."TS#")
  25 - filter("F"."SPARE1" IS NOT NULL)
  26 - access("FNFNO"="F"."FILE#")
  27 - filter("FE"."FENUM"="F"."FILE#")
  35 - filter("F"."FILE#"="FI"."RELFILE#")
  36 - access("F"."TS#"="FI"."TS#")
  37 - filter("TS"."BITMAPPED"=0)
  38 - access("TS"."TS#"="F"."TS#")
  41 - filter(("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND INTERNAL_FUNCTION("TS"."ONLINE$")))
  42 - filter("TS"."TS#"="F"."KTFBFETSN")
  43 - access("F"."KTFBFETSN"="FI"."TS#" AND "F"."KTFBFEFNO"="FI"."RELFILE#")
  49 - access("RB"."TS#"="FI"."TS#")
  50 - filter(("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND INTERNAL_FUNCTION("TS"."ONLINE$")))
  51 - access("TS"."TS#"="RB"."TS#")
  52 - filter(("U"."KTFBUEFNO"="FI"."RELFILE#" AND "U"."KTFBUESEGTSN"="RB"."TS#" AND
              "U"."KTFBUESEGFNO"="RB"."FILE#" AND "U"."KTFBUESEGBNO"="RB"."BLOCK#"))
  60 - access("U"."TS#"="RB"."TS#" AND "U"."SEGFILE#"="RB"."FILE#" AND
              "U"."SEGBLOCK#"="RB"."BLOCK#")
       filter(("U"."TS#"="FI"."TS#" AND "U"."SEGFILE#"="FI"."RELFILE#"))
  61 - filter("TS"."BITMAPPED"=0)
  62 - access("TS"."TS#"="U"."TS#")
  69 - filter(("V"."FNNAM" IS NOT NULL AND "V"."FNTYP"=7))
  70 - filter("V"."FNFNO"="HC"."KTFTHCTFNO")
  72 - access("HC"."KTFTHCTSN"="TS"."TS#")
  73 - filter(("TF"."TFDUP"<>0 AND BITAND("TF"."TFSTA",32)<>32 AND "V"."FNFNO"="TF"."TFNUM" AND
              "TF"."TFFNH"="V"."FNNUM"))
  77 - filter(("TS"."CONTENTS$"=1 AND "TS"."BITMAPPED"<>0 AND "TS"."ONLINE$"=1))
  78 - access("TS"."NAME"="D"."TABLESPACE_NAME")
  79 - filter(("HC"."KTFTHCCVAL"=0 AND "HC"."INST_ID"=USERENV('INSTANCE') AND
              "TS"."TS#"="HC"."KTFTHCTSN"))

Column Projection Information (identified by operation id):
-----------------------------------------------------------

   1 - (#keys=1) STRDEF[22], STRDEF[30], STRDEF[22], STRDEF[22], STRDEF[22]
   2 - STRDEF[30], STRDEF[22], STRDEF[22], STRDEF[22], STRDEF[22]
   3 - (#keys=1) "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22], "FREE_SPACE"[NUMBER,22]
   4 - "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22]
   5 - "TABLESPACE_NAME"[VARCHAR2,30], SUM("BLOCKS")[22], SUM("BYTES")[22]
   6 - "TABLESPACE_NAME"[VARCHAR2,30], "BYTES"[NUMBER,22], "BLOCKS"[NUMBER,22]
   7 - STRDEF[30], STRDEF[22], STRDEF[22]
   8 - "F"."BLOCKS"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
   9 - "F"."BLOCKS"[NUMBER,22], "F"."TS#"[NUMBER,22]
  10 - "F"."FILE#"[NUMBER,22], "F"."BLOCKS"[NUMBER,22], "F"."TS#"[NUMBER,22]
  11 - "INST_ID"[NUMBER,22], "FNTYP"[NUMBER,22], "FNFNO"[NUMBER,22], "FNFLG"[NUMBER,22],
       "FNNAM"[VARCHAR2,513]
  12 - "F"."FILE#"[NUMBER,22], "F"."BLOCKS"[NUMBER,22], "F"."TS#"[NUMBER,22]
  13 - "F".ROWID[ROWID,10], "F"."FILE#"[NUMBER,22]
  14 - "FE"."FENUM"[NUMBER,22]
  15 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22]
  16 - "TS".ROWID[ROWID,10]
  17 - "HC"."KTFBHCSZ"[NUMBER,22], "HC"."KTFBHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22]
  18 - "HC"."KTFBHCSZ"[NUMBER,22], "HC"."KTFBHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22], "F"."FILE#"[NUMBER,22]
  19 - "FNFNO"[NUMBER,22], "HC"."KTFBHCSZ"[NUMBER,22], "HC"."KTFBHCCVAL"[NUMBER,22],
       "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  20 - "FNFNO"[NUMBER,22], "HC"."KTFBHCTSN"[NUMBER,22], "HC"."KTFBHCSZ"[NUMBER,22],
       "HC"."KTFBHCCVAL"[NUMBER,22]
  21 - "INST_ID"[NUMBER,22], "FNTYP"[NUMBER,22], "FNFNO"[NUMBER,22], "FNFLG"[NUMBER,22],
       "FNNAM"[VARCHAR2,513]
  22 - "HC"."KTFBHCAFNO"[NUMBER,22], "HC"."KTFBHCTSN"[NUMBER,22], "HC"."KTFBHCSZ"[NUMBER,22],
       "HC"."KTFBHCCVAL"[NUMBER,22]
  23 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22]
  24 - "TS".ROWID[ROWID,10]
  25 - "F"."FILE#"[NUMBER,22]
  26 - "F".ROWID[ROWID,10], "F"."FILE#"[NUMBER,22]
  27 - "FE"."FENUM"[NUMBER,22]
  28 - "F"."TABLESPACE_NAME"[VARCHAR2,30], "FREE_SPACE"[NUMBER,22]
  29 - "TABLESPACE_NAME"[VARCHAR2,30], SUM("BYTES")[22]
  30 - "TABLESPACE_NAME"[VARCHAR2,30], "BYTES"[NUMBER,22]
  31 - STRDEF[30], STRDEF[22]
  32 - "F"."LENGTH"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  33 - "F"."TS#"[NUMBER,22], "F"."LENGTH"[NUMBER,22]
  34 - "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
  35 - "F".ROWID[ROWID,10], "F"."TS#"[NUMBER,22], "F"."FILE#"[NUMBER,22], "F"."LENGTH"[NUMBER,22]
  36 - "F".ROWID[ROWID,10]
  37 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22], "TS"."BITMAPPED"[NUMBER,22]
  38 - "TS".ROWID[ROWID,10]
  39 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "F"."KTFBFEBLKS"[NUMBER,22]
  40 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "F"."KTFBFETSN"[NUMBER,22],
       "F"."KTFBFEFNO"[NUMBER,22], "F"."KTFBFEBLKS"[NUMBER,22]
  41 - "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  42 - "F"."KTFBFETSN"[NUMBER,22], "F"."KTFBFEFNO"[NUMBER,22], "F"."KTFBFEBLKS"[NUMBER,22]
  44 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "U"."KTFBUEBLKS"[NUMBER,22]
  45 - "FI"."RELFILE#"[NUMBER,22], "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22],
       "RB"."BLOCK#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  46 - "FI"."RELFILE#"[NUMBER,22], "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22],
       "RB"."BLOCK#"[NUMBER,22]
  47 - "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
  48 - "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22], "RB"."BLOCK#"[NUMBER,22]
  49 - "RB".ROWID[ROWID,10], "RB"."TS#"[NUMBER,22]
  50 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."ONLINE$"[NUMBER,22], "TS"."CONTENTS$"[NUMBER,22], "TS"."BLOCKSIZE"[NUMBER,22],
       "TS"."BITMAPPED"[NUMBER,22]
  51 - "TS".ROWID[ROWID,10]
  52 - "U"."KTFBUESEGTSN"[NUMBER,22], "U"."KTFBUESEGFNO"[NUMBER,22],
       "U"."KTFBUESEGBNO"[NUMBER,22], "U"."KTFBUEFNO"[NUMBER,22], "U"."KTFBUEBLKS"[NUMBER,22]
  53 - "U"."LENGTH"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  54 - "U"."TS#"[NUMBER,22], "U"."LENGTH"[NUMBER,22]
  55 - "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22], "RB"."BLOCK#"[NUMBER,22],
       "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
  56 - "RB"."TS#"[NUMBER,22], "RB"."FILE#"[NUMBER,22], "RB"."BLOCK#"[NUMBER,22]
  57 - (#keys=0) "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
  58 - "FI"."TS#"[NUMBER,22], "FI"."RELFILE#"[NUMBER,22]
  59 - "U".ROWID[ROWID,10], "U"."TS#"[NUMBER,22], "U"."SEGFILE#"[NUMBER,22],
       "U"."SEGBLOCK#"[NUMBER,22], "U"."LENGTH"[NUMBER,22]
  60 - "U".ROWID[ROWID,10]
  61 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22], "TS"."BITMAPPED"[NUMBER,22]
  62 - "TS".ROWID[ROWID,10]
  63 - "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22], "USED_SPACE"[NUMBER,22],
       "FREE_SPACE"[NUMBER,22]
  64 - "D"."TABLESPACE_NAME"[VARCHAR2,30], "SPACE"[NUMBER,22]
  65 - "TS"."NAME"[VARCHAR2,30], SUM(DECODE("HC"."KTFTHCCVAL",0,"HC"."KTFTHCSZ",NULL))[22],
       SUM(DECODE("HC"."KTFTHCCVAL",0,"TS"."BLOCKSIZE"*"HC"."KTFTHCSZ",NULL))[22]
  66 - "HC"."KTFTHCSZ"[NUMBER,22], "HC"."KTFTHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22]
  67 - "V"."FNNUM"[NUMBER,22], "V"."FNFNO"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
       "HC"."KTFTHCCVAL"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  68 - "V"."FNNUM"[NUMBER,22], "V"."FNFNO"[NUMBER,22], "HC"."KTFTHCTSN"[NUMBER,22],
       "HC"."KTFTHCSZ"[NUMBER,22], "HC"."KTFTHCCVAL"[NUMBER,22]
  69 - "V"."FNNUM"[NUMBER,22], "V"."FNTYP"[NUMBER,22], "V"."FNFNO"[NUMBER,22],
       "V"."FNNAM"[VARCHAR2,513]
  70 - "HC"."KTFTHCTFNO"[NUMBER,22], "HC"."KTFTHCTSN"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
       "HC"."KTFTHCCVAL"[NUMBER,22]
  71 - "TS".ROWID[ROWID,10], "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30],
       "TS"."BLOCKSIZE"[NUMBER,22]
  72 - "TS".ROWID[ROWID,10]
  73 - "TF"."TFNUM"[NUMBER,22], "TF"."TFSTA"[NUMBER,22], "TF"."TFFNH"[NUMBER,22],
       "TF"."TFDUP"[NUMBER,22]
  74 - "USED_SPACE"[NUMBER,22], "FREE_SPACE"[NUMBER,22]
  75 - (#keys=1) "TS"."NAME"[VARCHAR2,30], SUM("HC"."KTFTHCFREE"*"TS"."BLOCKSIZE")[22],
       SUM(("HC"."KTFTHCSZ"-"HC"."KTFTHCFREE")*"TS"."BLOCKSIZE")[22]
  76 - "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
       "HC"."KTFTHCFREE"[NUMBER,22]
  77 - "TS"."TS#"[NUMBER,22], "TS"."NAME"[VARCHAR2,30], "TS"."BLOCKSIZE"[NUMBER,22]
  78 - "TS".ROWID[ROWID,10], "TS"."NAME"[VARCHAR2,30]
  79 - "HC"."INST_ID"[NUMBER,22], "HC"."KTFTHCTSN"[NUMBER,22], "HC"."KTFTHCSZ"[NUMBER,22],
       "HC"."KTFTHCFREE"[NUMBER,22], "HC"."KTFTHCCVAL"[NUMBER,22]


450 rows selected.

针对运行计划比較长的sql语句，第一眼看有没有明显的问题。如TABLE ACCESS FULL、MERGE JOIN CARTESIAN等，这些会给sql带来较差的性能问题。

一眼看去，全是系统基表，不敢乱动。

那么在运行计划56行那块，有个全表扫描，最要命的是上面另一个笛卡尔积。以下来看看recyclebin$表中有多少行记录：

SQL> select count(1) from RECYCLEBIN$;

  COUNT(1)
----------
    697111

接近70万行记录，难怪1小时也跑不出来。

清除recyclebin：

SQL> purge dba_recyclebin;

DBA Recyclebin purged.

SQL> select count(1) from recyclebin$;

  COUNT(1)
----------
      3334

再次执行sql：

SQL> set timing on;
SQL>            set linesize 200;
SQL>            set pagesize 1000;
SQL>            col tablespace_name for a20;
SQL>            col Total(M)  for 999,999,999;
SQL>            col USED(M) for 999,999,999;
SQL>            col FREE(M) for 999,999,999;
SQL>            SELECT D.TABLESPACE_NAME,
  2                    SPACE "Total(M)",
  3                    SPACE - NVL(FREE_SPACE, 0) "USED(M)",
  4                    ROUND((1 - NVL(FREE_SPACE, 0) / SPACE) * 100, 2) "USED(%)",
  5                    FREE_SPACE "FREE(M)"
  6               FROM (SELECT TABLESPACE_NAME,
  7                            ROUND(SUM(BYTES) / (1024 * 1024), 2) SPACE,
  8                            SUM(BLOCKS) BLOCKS
  9                       FROM DBA_DATA_FILES
 10                      GROUP BY TABLESPACE_NAME) D,
 11                    (SELECT TABLESPACE_NAME,
 12                            ROUND(SUM(BYTES) / (1024 * 1024), 2) FREE_SPACE
 13                       FROM DBA_FREE_SPACE
 14                      GROUP BY TABLESPACE_NAME) F
 15              WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
 16             UNION ALL --if have tempfile
 17             SELECT D.TABLESPACE_NAME,
 18                    SPACE "Total(M)",
 19                    USED_SPACE "USED(M)",
 20                    ROUND(NVL(USED_SPACE, 0) / SPACE * 100, 2) "USED(%)",
 21                    NVL(FREE_SPACE, 0) "FREE(M)"
 22               FROM (SELECT TABLESPACE_NAME,
 23                            ROUND(SUM(BYTES) / (1024 * 1024), 2) SPACE,
 24                            SUM(BLOCKS) BLOCKS
 25                       FROM DBA_TEMP_FILES
 26                      GROUP BY TABLESPACE_NAME) D,
 27                    (SELECT TABLESPACE_NAME,
 28                            ROUND(SUM(BYTES_USED) / (1024 * 1024), 2) USED_SPACE,
 29                            ROUND(SUM(BYTES_FREE) / (1024 * 1024), 2) FREE_SPACE
 30                       FROM V$TEMP_SPACE_HEADER
 31                      GROUP BY TABLESPACE_NAME) F
 32              WHERE D.TABLESPACE_NAME = F.TABLESPACE_NAME(+)
 33              ORDER BY 4;

20 rows selected.

Elapsed: 00:00:04.17

Execution Plan
----------------------------------------------------------
Plan hash value: 3967328987

----------------------------------------------------------------------------------------------------------
| Id  | Operation                             | Name             | Rows  | Bytes | Cost (%CPU)| Time     |
----------------------------------------------------------------------------------------------------------
|   0 | SELECT STATEMENT                      |                  |     3 |   178 |    20  (25)| 00:00:01 |
|   1 |  SORT ORDER BY                        |                  |     3 |   178 |    19  (22)| 00:00:01 |
|   2 |   UNION-ALL                           |                  |       |       |            |          |
|*  3 |    HASH JOIN OUTER                    |                  |     2 |   120 |    16  (19)| 00:00:01 |
|   4 |     VIEW                              |                  |     2 |    60 |     5  (20)| 00:00:01 |
|   5 |      HASH GROUP BY                    |                  |     2 |    68 |     5  (20)| 00:00:01 |
|   6 |       VIEW                            | DBA_DATA_FILES   |     2 |    68 |     4   (0)| 00:00:01 |
|   7 |        UNION-ALL                      |                  |       |       |            |          |
|   8 |         NESTED LOOPS                  |                  |     1 |   356 |     2   (0)| 00:00:01 |
|   9 |          NESTED LOOPS                 |                  |     1 |   341 |     1   (0)| 00:00:01 |
|  10 |           NESTED LOOPS                |                  |     1 |   328 |     1   (0)| 00:00:01 |
|* 11 |            FIXED TABLE FULL           | X$KCCFN          |     1 |   310 |     0   (0)| 00:00:01 |
|* 12 |            TABLE ACCESS BY INDEX ROWID| FILE$            |     1 |    18 |     1   (0)| 00:00:01 |
|* 13 |             INDEX UNIQUE SCAN         | I_FILE1          |     1 |       |     0   (0)| 00:00:01 |
|* 14 |           FIXED TABLE FIXED INDEX     | X$KCCFE (ind:1)  |    20 |   260 |     0   (0)| 00:00:01 |
|  15 |          TABLE ACCESS CLUSTER         | TS$              |     1 |    15 |     1   (0)| 00:00:01 |
|* 16 |           INDEX UNIQUE SCAN           | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|  17 |         NESTED LOOPS                  |                  |     1 |   399 |     2   (0)| 00:00:01 |
|  18 |          NESTED LOOPS                 |                  |     1 |   386 |     2   (0)| 00:00:01 |
|  19 |           NESTED LOOPS                |                  |     1 |   377 |     1   (0)| 00:00:01 |
|  20 |            NESTED LOOPS               |                  |     1 |   362 |     0   (0)| 00:00:01 |
|* 21 |             FIXED TABLE FULL          | X$KCCFN          |     1 |   310 |     0   (0)| 00:00:01 |
|* 22 |             FIXED TABLE FIXED INDEX   | X$KTFBHC (ind:1) |     1 |    52 |     0   (0)| 00:00:01 |
|  23 |            TABLE ACCESS CLUSTER       | TS$              |     1 |    15 |     1   (0)| 00:00:01 |
|* 24 |             INDEX UNIQUE SCAN         | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|* 25 |           TABLE ACCESS BY INDEX ROWID | FILE$            |     1 |     9 |     1   (0)| 00:00:01 |
|* 26 |            INDEX UNIQUE SCAN          | I_FILE1          |     1 |       |     0   (0)| 00:00:01 |
|* 27 |          FIXED TABLE FIXED INDEX      | X$KCCFE (ind:1)  |    20 |   260 |     0   (0)| 00:00:01 |
|  28 |     VIEW                              |                  |     5 |   150 |    11  (19)| 00:00:01 |
|  29 |      HASH GROUP BY                    |                  |     5 |   105 |    11  (19)| 00:00:01 |
|  30 |       VIEW                            | DBA_FREE_SPACE   |    79 |  1659 |    10  (10)| 00:00:01 |
|  31 |        UNION-ALL                      |                  |       |       |            |          |
|  32 |         NESTED LOOPS                  |                  |     1 |    64 |     1   (0)| 00:00:01 |
|  33 |          NESTED LOOPS                 |                  |     1 |    45 |     1   (0)| 00:00:01 |
|  34 |           INDEX FULL SCAN             | I_FILE2          |     5 |    30 |     1   (0)| 00:00:01 |
|* 35 |           TABLE ACCESS CLUSTER        | FET$             |     1 |    39 |     0   (0)| 00:00:01 |
|* 36 |            INDEX UNIQUE SCAN          | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|* 37 |          TABLE ACCESS CLUSTER         | TS$              |     1 |    19 |     0   (0)| 00:00:01 |
|* 38 |           INDEX UNIQUE SCAN           | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|  39 |         NESTED LOOPS                  |                  |    76 |  5320 |     4   (0)| 00:00:01 |
|  40 |          NESTED LOOPS                 |                  |    76 |  4864 |     4   (0)| 00:00:01 |
|* 41 |           TABLE ACCESS FULL           | TS$              |     5 |   125 |     4   (0)| 00:00:01 |
|* 42 |           FIXED TABLE FIXED INDEX     | X$KTFBFE (ind:1) |    17 |   663 |     0   (0)| 00:00:01 |
|* 43 |          INDEX UNIQUE SCAN            | I_FILE2          |     1 |     6 |     0   (0)| 00:00:01 |
|  44 |         NESTED LOOPS                  |                  |     1 |   135 |     2  (50)| 00:00:01 |
|  45 |          NESTED LOOPS                 |                  |     1 |    70 |     1   (0)| 00:00:01 |
|  46 |           NESTED LOOPS                |                  |     1 |    45 |     1   (0)| 00:00:01 |
|  47 |            INDEX FULL SCAN            | I_FILE2          |     5 |    30 |     1   (0)| 00:00:01 |
|  48 |            TABLE ACCESS BY INDEX ROWID| RECYCLEBIN$      |     1 |    39 |     0   (0)| 00:00:01 |
|* 49 |             INDEX RANGE SCAN          | RECYCLEBIN$_TS   |     1 |       |     0   (0)| 00:00:01 |
|* 50 |           TABLE ACCESS CLUSTER        | TS$              |     1 |    25 |     0   (0)| 00:00:01 |
|* 51 |            INDEX UNIQUE SCAN          | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|* 52 |          FIXED TABLE FIXED INDEX      | X$KTFBUE (ind:1) |     1 |    65 |     1 (100)| 00:00:01 |
|  53 |         NESTED LOOPS                  |                  |     1 |   116 |     3   (0)| 00:00:01 |
|  54 |          NESTED LOOPS                 |                  |     1 |    97 |     3   (0)| 00:00:01 |
|  55 |           MERGE JOIN CARTESIAN        |                  |     1 |    45 |     3   (0)| 00:00:01 |
|  56 |            TABLE ACCESS FULL          | RECYCLEBIN$      |     1 |    39 |     2   (0)| 00:00:01 |
|  57 |            BUFFER SORT                |                  |     5 |    30 |     1   (0)| 00:00:01 |
|  58 |             INDEX FULL SCAN           | I_FILE2          |     5 |    30 |     1   (0)| 00:00:01 |
|  59 |           TABLE ACCESS CLUSTER        | UET$             |     1 |    52 |     0   (0)| 00:00:01 |
|* 60 |            INDEX UNIQUE SCAN          | I_FILE#_BLOCK#   |     1 |       |     0   (0)| 00:00:01 |
|* 61 |          TABLE ACCESS CLUSTER         | TS$              |     1 |    19 |     0   (0)| 00:00:01 |
|* 62 |           INDEX UNIQUE SCAN           | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|  63 |    NESTED LOOPS OUTER                 |                  |     1 |    58 |     3  (34)| 00:00:01 |
|  64 |     VIEW                              |                  |     1 |    30 |     2  (50)| 00:00:01 |
|  65 |      HASH GROUP BY                    |                  |     1 |   416 |     2  (50)| 00:00:01 |
|  66 |       NESTED LOOPS                    |                  |     1 |   416 |     1   (0)| 00:00:01 |
|  67 |        NESTED LOOPS                   |                  |     1 |   364 |     1   (0)| 00:00:01 |
|  68 |         NESTED LOOPS                  |                  |     1 |   349 |     0   (0)| 00:00:01 |
|* 69 |          FIXED TABLE FULL             | X$KCCFN          |     1 |   297 |     0   (0)| 00:00:01 |
|* 70 |          FIXED TABLE FIXED INDEX      | X$KTFTHC (ind:1) |     1 |    52 |     0   (0)| 00:00:01 |
|  71 |         TABLE ACCESS CLUSTER          | TS$              |     1 |    15 |     1   (0)| 00:00:01 |
|* 72 |          INDEX UNIQUE SCAN            | I_TS#            |     1 |       |     0   (0)| 00:00:01 |
|* 73 |        FIXED TABLE FIXED INDEX        | X$KCCTF (ind:1)  |     1 |    52 |     0   (0)| 00:00:01 |
|  74 |     VIEW PUSHED PREDICATE             |                  |     1 |    28 |     1   (0)| 00:00:01 |
|  75 |      SORT GROUP BY                    |                  |     1 |    90 |     1   (0)| 00:00:01 |
|  76 |       NESTED LOOPS                    |                  |     1 |    90 |     1   (0)| 00:00:01 |
|* 77 |        TABLE ACCESS BY INDEX ROWID    | TS$              |     1 |    25 |     1   (0)| 00:00:01 |
|* 78 |         INDEX UNIQUE SCAN             | I_TS1            |     1 |       |     0   (0)| 00:00:01 |
|* 79 |        FIXED TABLE FIXED INDEX        | X$KTFTHC (ind:2) |     1 |    65 |     0   (0)| 00:00:01 |
----------------------------------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   3 - access("D"."TABLESPACE_NAME"="F"."TABLESPACE_NAME"(+))
  11 - filter("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
              BITAND("FNFLG",4)<>4)
  12 - filter("F"."SPARE1" IS NULL)
  13 - access("FNFNO"="F"."FILE#")
  14 - filter("FE"."FENUM"="F"."FILE#")
  16 - access("F"."TS#"="TS"."TS#")
  21 - filter("FNNAM" IS NOT NULL AND "FNTYP"=4 AND "INST_ID"=USERENV('INSTANCE') AND
              BITAND("FNFLG",4)<>4)
  22 - filter("FNFNO"="HC"."KTFBHCAFNO")
  24 - access("HC"."KTFBHCTSN"="TS"."TS#")
  25 - filter("F"."SPARE1" IS NOT NULL)
  26 - access("FNFNO"="F"."FILE#")
  27 - filter("FE"."FENUM"="F"."FILE#")
  35 - filter("F"."FILE#"="FI"."RELFILE#")
  36 - access("F"."TS#"="FI"."TS#")
  37 - filter("TS"."BITMAPPED"=0)
  38 - access("TS"."TS#"="F"."TS#")
  41 - filter("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND ("TS"."ONLINE$"=1 OR
              "TS"."ONLINE$"=4))
  42 - filter("TS"."TS#"="F"."KTFBFETSN")
  43 - access("F"."KTFBFETSN"="FI"."TS#" AND "F"."KTFBFEFNO"="FI"."RELFILE#")
  49 - access("RB"."TS#"="FI"."TS#")
  50 - filter("TS"."CONTENTS$"=0 AND "TS"."BITMAPPED"<>0 AND ("TS"."ONLINE$"=1 OR
              "TS"."ONLINE$"=4))
  51 - access("TS"."TS#"="RB"."TS#")
  52 - filter("U"."KTFBUEFNO"="FI"."RELFILE#" AND "U"."KTFBUESEGTSN"="RB"."TS#" AND
              "U"."KTFBUESEGFNO"="RB"."FILE#" AND "U"."KTFBUESEGBNO"="RB"."BLOCK#")
  60 - access("U"."TS#"="RB"."TS#" AND "U"."SEGFILE#"="RB"."FILE#" AND
              "U"."SEGBLOCK#"="RB"."BLOCK#")
       filter("U"."TS#"="FI"."TS#" AND "U"."SEGFILE#"="FI"."RELFILE#")
  61 - filter("TS"."BITMAPPED"=0)
  62 - access("TS"."TS#"="U"."TS#")
  69 - filter("V"."FNNAM" IS NOT NULL AND "V"."FNTYP"=7)
  70 - filter("V"."FNFNO"="HC"."KTFTHCTFNO")
  72 - access("HC"."KTFTHCTSN"="TS"."TS#")
  73 - filter("TF"."TFDUP"<>0 AND BITAND("TF"."TFSTA",32)<>32 AND "V"."FNFNO"="TF"."TFNUM" AND
              "TF"."TFFNH"="V"."FNNUM")
  77 - filter("TS"."CONTENTS$"=1 AND "TS"."BITMAPPED"<>0 AND "TS"."ONLINE$"=1)
  78 - access("TS"."NAME"="D"."TABLESPACE_NAME")
  79 - filter("HC"."KTFTHCCVAL"=0 AND "HC"."INST_ID"=USERENV('INSTANCE') AND
              "TS"."TS#"="HC"."KTFTHCTSN")


Statistics
----------------------------------------------------------
       3472  recursive calls
       2445  db block gets
      25284  consistent gets
       3282  physical reads
          0  redo size
       1675  bytes sent via SQL*Net to client
        535  bytes received via SQL*Net from client
          3  SQL*Net roundtrips to/from client
          5  sorts (memory)
          0  sorts (disk)
         20  rows processed

SQL>

这个时候sql仅仅须要4秒就能出结果了。从业务那块了解到，他们每天会批量导入和删除表。那么问题就明了了。

定时清理recyclebin还是很重要的。

一个表空间使用率查询sql的优化

标签：range varchar lte use_nl count dba mod 2.0 rom

原文地址：http://www.cnblogs.com/mfmdaoyou/p/6883239.html

踩

(0)

评论一句话评论（0）

分享档案

更多>

2021年07月29日 (22)
2021年07月28日 (40)
2021年07月27日 (32)
2021年07月26日 (79)
2021年07月23日 (29)
2021年07月22日 (30)
2021年07月21日 (42)
2021年07月20日 (16)
2021年07月19日 (90)
2021年07月16日 (35)

周排行