體系架構

界面風格

模塊組成

模塊標準功能

ETL@RACTEST> ETL@RACTEST>

begin

2 for i in 110000 loop

3 insert into test values (i);

4 end loop;

5 end;

6 / PL/SQL procedure successfully

completed. Elapsed: 00:00:00.44 ETL@RACTEST> set autot trace

ETL@RACTEST>

ETL@RACTEST>Oracle培訓; select *

from test;

10000 rows selected. Elapsed:

00:00:00.05 Execution Plan Plan hash value: 1357081020

b9a315bf10497b7c8bdb9a8b126f7b-- |

Id | Operation

| Name | Rows | Bytes | Cost

(%CPU)| Time

| |

0 | SELECT STATEMENT |

| 10000 |

126K|

6

(0)| 00:00:01 | |

1 | TABLE ACCESS FULL| TEST | 10000

|

126K|

6 (0)| 00:00:01 |

1b184647115e9e1cef9c68ba9c6eaf-e1afa0c7c00486aada4e03270f8958-

Note

- dynamic sampling used for this

statement Statistics

0 recursive calls

0 db block gets

690 consistent gets

0 physical reads

0 redo size

214231 bytes sent via SQL*Net to

client

7791 bytes received via SQL*Net

from client

668 SQL*Net roundtrips to/from

client

0 sorts (memory)

0 sorts (disk)

10000 rows processed 可以看到select

*讀了690個內存塊。

ETL@RACTEST>oracle代理; select *

from test order by 1;

10000 rows selected. Elapsed:

00:00:00.04 Execution Plan Plan hash value: 2007178810

| Id | Operation

| Name | Rows | Bytes | Cost

(%CPU)| Time

| | 0 | SELECT STATEMENT |

| 10000 | 126K|

7 (15)| 00:00:01 | | 1 | SORT ORDER

BY

|

| 10000 |

126K|

7

(15)| 00:00:01 | | 2 |

TABLE ACCESS FULL| TEST | 10000 |

126K|

6 (0)| 00:00:01 | - Note

- dynamic sampling used for this

statement Statistics

0 recursive calls

0 db block gets

23 consistent gets

0 physical reads

0 redo size

174288 bytes sent via SQL*Net to

client

7791 bytes received via SQL*Net

from client

668 SQL*Net roundtrips to/from

client

1 sorts (memory)

0 sorts (disk)

10000 rows

processed

總結

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