论文仿真实验数据备忘


......................................2009.11.13   by Rize Jin...........................................

..................................Scenario a: Insert 100,1000 index units.......................

For Clustered-Mode:

Right now we got totlely 93692 blocks writen.

insert 100000 index units cost 99721 ms.

*******************  WriteHead Fuc. *************************
****   HeadBlock.RootBlock: 68    ****
****   HeadBlock.AllocBlock: 2341    ****
************************  END  ******************************

因为缓存机制的缘故10万次写入,变成了93692次写入;

分裂次数:(2340 - 1588) = 752;

一次分裂会有一个擦除操作和两次写入操作;

 如果设写入操作耗时:200us, 删除操作耗时: 2ms ;

可以导出10万次index units的插入操作总耗时: 752*2ms + (93692 + 752) * 200us = 20392.8 ms;

 

For Non-clustered-Mode:

mysql> select 100000/63;
+-----------+
| 100000/63 |
+-----------+
| 1587.3016 |
+-----------+ 

这个模式不存在分裂, 总耗时: 1588*200us = 317.6 ms

 

.....................................2009.11.15   by Rize Jin..........................................

.............................Scenario b: Insert 10,1000 index units...........................

.....................................and search 100,1000 times.....................................

For Clustered-Mode:

Right now we got totlely 6815 blocks writen.

 

*******************  WriteHead Fuc. *************************
****   HeadBlock.RootBlock: 68    ****
****   HeadBlock.AllocBlock: 231    ****
************************  END  ******************************
 

可以得出1万次index units的插入操作总耗时: 230*2ms + (6815 + 230) * 200us = 1869 ms;

设读一个页的耗时是:15us;

树高为2;

则100,000次的读操作的耗时为: 15 * 2 *100, 000 = 3000 ms;

则情景B的总耗时:4869 ms.

 

For Non-clustered-Mode:

插入总耗时: 159*200us = 31.8 ms;

一个逻辑节点到底对应多少个物理页,是比较难说明的,而且并不固定,它是大于等于1并且小于等于63的数字,可以假设它是24;

则100,000次的读操作的耗时为: 15 * 2 * 24 * 100, 000 = 72000 ms;

则情景B的总耗时:72031.8 ms. 

 

 

 

.....................................2009.11.15   by Rize Jin..........................................

.............................Scenario c: Insert 50,1000 index units...........................

.....................................and search 50,1000 times.....................................

For Clustered-Mode:

Right now we got totlely 44698 blocks writen.

*******************  WriteHead Fuc. *************************
****   HeadBlock.RootBlock: 68    ****
****   HeadBlock.AllocBlock: 1178    ****
************************  END  ******************************

5万次index units的插入操作总耗时: 1177*2ms + (44698 + 1177) * 200us = 11529 ms;

树高为3;

则50,000次的读操作的耗时为: 15 * 3 *50, 000 = 2250 ms;

则情景c的总耗时:13779 ms 

 

 

For Non-clustered-Mode:

插入总耗时: 794*200us = 158.8 ms;

则50,000次的读操作的耗时为: 15 * 2 *  8 * 50, 000 = 12000 ms;

则情景c的总耗时:12158.8 ms.

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