DB Tech Showcase 2016 - E35 - SQLチューニング総合診療所的予防医学

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http://discus-hamburg.cocolog-nifty.com

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| Operation | Name | Mem | Temp | =================================================| SELECT STATEMENT | | | || HASH JOIN | | 4M | 1G || PARTITION RANGE SINGLE | | | || TABLE ACCESS FULL | FOO | | || TABLE ACCESS FULL | BAR | | |

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| Operation | Name | Mem | Temp | =================================================| SELECT STATEMENT | | | || HASH JOIN | | 4M | 1G || PARTITION RANGE SINGLE | | | || TABLE ACCESS FULL | FOO | | || TABLE ACCESS FULL | BAR | | |

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| Operation | Name | Mem |==========================================| SELECT STATEMENT | | | | HASH JOIN | | 250M|| PARTITION RANGE SINGLE | | || TABLE ACCESS FULL | FOO | || TABLE ACCESS FULL | BAR | |

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| Operation | Name | Mem |==========================================| SELECT STATEMENT | | | | HASH JOIN | | 250M|| PARTITION RANGE SINGLE | | || TABLE ACCESS FULL | FOO | || TABLE ACCESS FULL | BAR | |

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-----------------------------------------------------------------------------| Id | Operation | Name | E-Rows | A-Rows | A-Time | Reads |-----------------------------------------------------------------------------| 0 | SELECT STATEMENT | | | 0 |00:00:01.05 | 20052 || 1 | SORT ORDER BY | | 20 | 0 |00:00:01.05 | 20052 ||* 2 | TABLE ACCESS FULL| FOOBAR | 20 | 0 |00:00:01.05 | 20052 |-----------------------------------------------------------------------------

-----------------------------------------------------------------------------------------------------------| Id | Operation | Name | E-Rows | A-Rows | A-Time | Reads | Writes | Used-Mem | Used-Tmp|-----------------------------------------------------------------------------------------------------------| 0 | SELECT STATEMENT | | | 20000 |00:00:04.21 | 37325 | 17273 | | || 1 | SORT ORDER BY | | 20000 | 20000 |00:00:04.21 | 37325 | 17273 | 71M (1)| 135K||* 2 | TABLE ACCESS FULL| FOOBAR | 20000 | 20000 |00:00:01.25 | 20052 | 0 | | |-----------------------------------------------------------------------------------------------------------

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=========================================================================================================| 0 | SELECT STATEMENT | | | 1 | | | || 1 | HASH JOIN | | | 1 | | | || 2 | TABLE ACCESS FULL | FOOBAR | 1 | 1 | 0 | 100.00 | direct path read (1) || 3 | TABLE ACCESS FULL | HOGEHOGE | | | | | |=========================================================================================================

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===============================================================================================================| 0 | SELECT STATEMENT | | 2 | 1 | 0 | | || 1 | HASH JOIN | | 3 | 1 | 0 | 100.00 | direct path write temp (3) || 2 | TABLE ACCESS FULL | FOOBAR | 2 | 1 | 20000 | | || 3 | TABLE ACCESS FULL | HOGEHOGE | | 1 | | | |========================================================================================================================================================================================================================| 0 | SELECT STATEMENT | | | 1 | | | || 1 | HASH JOIN | | | 1 | | | || 2 | TABLE ACCESS FULL | FOOBAR | 1 | 1 | 0 | 100.00 | direct path read (1) || 3 | TABLE ACCESS FULL | HOGEHOGE | | | | | |=========================================================================================================

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==============================================================================================================| Id | Operation | Name | Time | Execs | Rows | Activity | Activity Detail || | | | Active(s) | | (Actual) | (%) | (# samples) |==============================================================================================================| 0 | SELECT STATEMENT | | 229 | 1 | 400K | 25.00 | Cpu (2) || 1 | HASH JOIN | | 229 | 1 | 400K | 50.00 | Cpu (3) || | | | | | | | direct path read temp (1) || 2 | TABLE ACCESS FULL | FOOBAR | 3 | 1 | 20000 | | || 3 | TABLE ACCESS FULL | HOGEHOGE | 107 | 1 | 20000 | 12.50 | Cpu (1) |=============================================================================================================================================================================================================================| 0 | SELECT STATEMENT | | 2 | 1 | 0 | | || 1 | HASH JOIN | | 3 | 1 | 0 | 100.00 | direct path write temp (3) || 2 | TABLE ACCESS FULL | FOOBAR | 2 | 1 | 20000 | | || 3 | TABLE ACCESS FULL | HOGEHOGE | | 1 | | | |========================================================================================================================================================================================================================| 0 | SELECT STATEMENT | | | 1 | | | || 1 | HASH JOIN | | | 1 | | | || 2 | TABLE ACCESS FULL | FOOBAR | 1 | 1 | 0 | 100.00 | direct path read (1) || 3 | TABLE ACCESS FULL | HOGEHOGE | | | | | |=========================================================================================================

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ID COUNT(1)---------- ---------- 1 2000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 20000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

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ID COUNT(1)---------- ---------- 1 2000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 20000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

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ID COUNT(1)---------- ---------- 1 2000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 20000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

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ID COUNT(1)---------- ---------- 1 2000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 20000 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

ID COUNT(1)---------- ---------- 1 2 25 20 22 20 34 20 30 20

940 20 912 20 930 20 885 20 906 20 925 20

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===================================================================================================================| Id | Operation | Name | Rows | Time | Rows | Mem | Activity | Activity Detail || | | | (Estim) | Active(s) | (Actual) | (Max) | (%) | (# samples) |===================================================================================================================| 0 | SELECT STATEMENT | | | 225 | 400K | | 75.00 | Cpu (3) || 1 | HASH JOIN | | 401K | 225 | 400K | 17M | | || 2 | TABLE ACCESS FULL | FOOBAR | 2000 | 1 | 2000 | | | || 3 | TABLE ACCESS FULL | HOGEHOGE | 20291 | 225 | 20000 | | 25.00 | direct path read (1) |===================================================================================================================

===================================================================================================================| 0 | SELECT STATEMENT | | | 1 | 4 | | | || 1 | HASH JOIN | | 23 | 1 | 4 | 458K | | || 2 | TABLE ACCESS FULL | FOOBAR | 20 | 1 | 2 | | | || 3 | TABLE ACCESS FULL | HOGEHOGE | 313 | 1 | 2 | | 100.00 | direct path read (1) |===================================================================================================================

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ID COL1 COL2---------- ------------------------------ -------------- 2 ****************************** ************** 4 ****************************** ************** 5 ****************************** ************** 3 ****************************** ************** 1 ****************************** ************** 8 ****************************** ************** 9 ****************************** ************** 10 ****************************** ************** 11 ****************************** ************** 12 ****************************** **************

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ID COL1 COL2---------- ------------------------------ -------------- 2 ****************************** ************** 4 ****************************** ************** 5 ****************************** ************** 3 ****************************** ************** 1 ****************************** ************** 8 ****************************** ************** 9 ****************************** ************** 10 ****************************** ************** 11 ****************************** ************** 12 ****************************** **************

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ID COL1 COL2---------- ------------------------------ -------------- 2 ****************************** ************** 4 ****************************** ************** 5 ****************************** ************** 3 ****************************** ************** 1 ****************************** ************** 8 ****************************** ************** 9 ****************************** ************** 10 ****************************** ************** 11 ****************************** ************** 12 ****************************** **************

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SEGMENT_NAME SUM(BLOCKS) MB------------- ----------- ----------SEGMENTSIZE 1024 8

TABLE_NAME COLUMN_NAME NUM_NULLS NUM_DISTINCT DENSITY AVG_COL_LEN NUM_BUCKETS HISTOGRAM------------- ------------ --------- ------------ ---------- ----------- ----------- ----------SEGMENTSIZE ID 0 1000 .001 4 1 NONESEGMENTSIZE DATA1 0 1 1 4001 1 NONESEGMENTSIZE DATA2 0 1 1 3001 1 NONE

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SEGMENT_NAME SUM(BLOCKS) MB----------------- ----------- ----------SMALL_SEGMENTSIZE 8 .0625

TABLE_NAME COLUMN_NAME NUM_NULLS NUM_DISTINCT DENSITY AVG_COL_LEN NUM_BUCKETS HISTOGRAM----------------- ------------ --------- ------------ ---------- ----------- ----------- ----------SMALL_SEGMENTSIZE ID 0 1000 .001 4 1 NONESMALL_SEGMENTSIZE DATA1 0 1 1 3 1 NONESMALL_SEGMENTSIZE DATA2 0 1 1 6 1 NONE

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==============================================================================| Id | Operation | Name | Rows | Rows | Read | Read || | | | (Estim) | (Actual) | Reqs | Bytes |==============================================================================| 0 | SELECT STATEMENT | | | 1000 | | || 1 | TABLE ACCESS FULL | SEGMENTSIZE | 1000 | 1000 | 37 | 8MB |==============================================================================

====================================================================================| Id | Operation | Name | Rows | Rows | Read | Read || | | | (Estim) | (Actual) | Reqs | Bytes |====================================================================================| 0 | SELECT STATEMENT | | | 1000 | | || 1 | TABLE ACCESS FULL | SMALL_SEGMENTSIZE | 1000 | 1000 | 2 | 32768 |====================================================================================

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Plan hash value: 3426918692-----------------------------------------------------------------| Id | Operation | Name | Starts | E-Rows |-----------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | ||* 1 | FILTER | | 1 | || 2 | TABLE ACCESS BY INDEX ROWID| FOO | 1 | 50 ||* 3 | INDEX RANGE SCAN | PK_FOO | 1 | 50 |-----------------------------------------------------------------

Plan hash value: 2962421549--------------------------------------------------------------| Id | Operation | Name | Starts | E-Rows |E-Bytes|--------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | | || 1 | SORT ORDER BY | | 1 | 5000 | 2485K||* 2 | FILTER | | 1 | | ||* 3 | TABLE ACCESS FULL| FOO | 1 | 5000 | 2485K|--------------------------------------------------------------

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INDEX_NAME UNIQUENES DISTINCT_KEYS CLUSTERING_FACTOR ---------- --------- ------------- ----------------- PK_FOO UNIQUE 20000 19993

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INDEX_NAME CLUSTERING_FACTOR NUM_OF_TABLE_BLOCKS NUM_OF_TABLE_ROWS----------- ----------------- ------------------- -----------------PK_HICLS 992 80 1000PK_LOCLS 72 80 1000

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Plan Hash # Value Executions--- ---------------- --------------1 1885085827 20002 1756993664 20003 3400946141 20004 13177233 2000 5 3564047035 2000

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Plan Hash # Value Executions--- ---------------- --------------1 1885085827 20002 1756993664 20003 3400946141 20004 13177233 2000 5 3564047035 2000

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|MERGE JOIN | || TABLE ACCESS BY INDEX ROWID| FOO || INDEX RANGE SCAN | PK_FOO || SORT JOIN | || TABLE ACCESS FULL | BAR |

|HASH JOIN | || TABLE ACCESS FULL| FOO || TABLE ACCESS FULL| BAR |

|NESTED LOOPS | || NESTED LOOPS | || TABLE ACCESS FULL | FOO || INDEX RANGE SCAN | PK_BAR || TABLE ACCESS BY INDEX ROWID| BAR |

|NESTED LOOPS | || NESTED LOOPS | || TABLE ACCESS BY INDEX ROWID BATCHED| FOO || INDEX RANGE SCAN | PK_FOO || INDEX RANGE SCAN | PK_BAR || TABLE ACCESS BY INDEX ROWID | BAR |

|HASH JOIN || TABLE ACCESS BY INDEX ROWID BATCHED| FOO | INDEX RANGE SCAN | PK_FOO| TABLE ACCESS BY INDEX ROWID BATCHED| BAR| INDEX RANGE SCAN | PK_BAR

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:v1 = 1 :v2 = 2120:v3 = 2000

:v1 = 200 :v2 = 2300:v3 = 2000

:v1 = 50 :v2 = 300:v3 = 2000

:v1 = 15000 :v2 = 17400:v3 = 2000

:v1 = x :v2 = x+300:v3 = 2000

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:v1 = 1 :v2 = 2120:v3 = 2000

:v1 = 200 :v2 = 2300:v3 = 2000

:v1 = 50 :v2 = 300:v3 = 2000

:v1 = 15000 :v2 = 17400:v3 = 2000

:v1 = x :v2 = x+300:v3 = 2000

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:v1 = 1 :v2 = 2120:v3 = 2000

:v1 = 200 :v2 = 2300:v3 = 2000

:v1 = 50 :v2 = 300:v3 = 2000

:v1 = 15000 :v2 = 17400:v3 = 2000

:v1 = x :v2 = x+300:v3 = 2000

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:v1 = 1 :v2 = 2120:v3 = 2000

:v1 = 200 :v2 = 2300:v3 = 2000

:v1 = 50 :v2 = 300:v3 = 2000

:v1 = 15000 :v2 = 17400:v3 = 2000

:v1 = x :v2 = x+300:v3 = 2000

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Plan Hash # Value Executions--- ---------------- -------------1 1756993664 20002 3400946141 20003 1885085827 20004 13177233 20005 3564047035 2000

1 1756993664 2004 2 3564047035 5991 3 13177233 2000 4 3400946141 4 5 1885085827 1

1 13177233 10,000

Plan Hash # Value Executions--- ---------------- -------------1 3564047035 10,0002 13177233 0

1 3564047035 10,000

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1 1756993664 2004 2 3564047035 5991 3 13177233 2000 4 3400946141 4 5 1885085827 1

1 13177233 10,000

1 3564047035 10,000

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1 1756993664 2004 2 3564047035 5991 3 13177233 2000 4 3400946141 4 5 1885085827 1

1 13177233 10,000

1 3564047035 10,000

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1 1756993664 2004 2 3564047035 5991 3 13177233 2000 4 3400946141 4 5 1885085827 1

1 13177233 10,000

1 3564047035 10,000

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1 1756993664 2004 2 3564047035 5991 3 13177233 2000 4 3400946141 4 5 1885085827 1

1 13177233 10,000

1 3564047035 10,000

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1 1756993664 2004 2 3564047035 5991 3 13177233 2000 4 3400946141 4 5 1885085827 1

1 13177233 10,000

1 3564047035 10,000

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dba_sql_plan_dir_objects

OWNER OBJECT OBJECT_NAME SUBOBJECT_NAME--------- ------ --------------- ------------------MDSYS COLUMN RDF_LINK$ CANON_END_NODE_IDMDSYS COLUMN RDF_LINK$ G_IDMDSYS COLUMN RDF_LINK$ P_VALUE_IDMDSYS COLUMN RDF_LINK$ START_NODE_IDMDSYS TABLE RDF_LINK$SH COLUMN PRODUCTS PROD_CATEGORYSH COLUMN PRODUCTS PROD_IDSH TABLE PRODUCTS

dba_sql_plan_directives;

TYPE REASON---------------- ------------------------------------DYNAMIC_SAMPLING SINGLE TABLE CARDINALITY MISESTIMATEDYNAMIC_SAMPLING JOIN CARDINALITY MISESTIMATEDYNAMIC_SAMPLING GROUP BY CARDINALITY MISESTIMATE

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http://www.aaai.org/ocs/index.php/AAAI/AAAI14/paper/viewFile/8638/8698

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CBO (Cost Base Optimizer) SQL Transformation

(Join Elimination, View Merge, Vector Transform) Bind Peek

Adaptive Cursor Sharing Statistics Feedback Dynamic Statistics

Adaptive Plan SQL Plan Directives

SQL Plan stability Management SQL Hints

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http://www.jpoug.org

CBO (Cost Base Optimizer) SQL Transformation