本帖最后由 fan_ya 于 2015-11-30 23:57 编辑

你对系统介绍得太少，没法给具体建议，还是需要看你的目的，是做已有系统容量和瓶颈的评估，还是做系统选型。

主要的瓶颈有：

1 DB synchronization and concurrentcy

2 Application

3 DB IO

4 DB memory

5 DB CPU

最直接的方法是有已有的运维数据参考比较；如果没有那么就应该做整体的负荷测试。

只通过数据估算，很容易踩上预料之外的瓶颈。

下面几个估算文档也值得参考。Dell的

http://www.dell.com/downloads/gl ... ?forcedownload=true

Amazon的

https://d0.awsstatic.com/whitepa ... mance+estimation%27

BEA的，是面向Application的

https://docs.oracle.com/cd/E13222_01/wls/docs81/capplan/capgen.html

Access Manager的，也可以作Application预估的参考

https://docs.oracle.com/cd/B28196_01/idmanage.1014/b25344/capacity.htm

比如看看能不能回答好这些问题：

Question 1: Is this database designed for Online Transaction Processing (OLTP) or Online Analytical

Processing (OLAP)? ...............................................................................................................................................8

Question 2: Which of the following capabilities should be achieved?.................................................................9

Question 3: How would you characterize your storage requirements?.............................................................10

Question 4: Which server form factor and processor type do you prefer? .......................................................12

Question 5: What is the maximum expected size of the database (include growth for the next three years) .13

? ..........................................................................................................................................................................13

OLTP workload specific questions: Q6 – Q8 .......................................................................................................14

Question 6: What is the maximum number of concurrent application connections to the database?............14

Question 7: Please enter your IOPs or MB/s throughput requirement (asked if question 1 OLTP was

selected)..............................................................................................................................................................16

Question 8: Please enter your I/O Bandwidth requirement (asked if question 1 OLAP was selected).............17

Question 9: Please select any additional features that may apply.....................................................................17

Question 9a: Please describe the database landscape. Check all that apply. ....................................................19

Question 9b: Which application will be using the Oracle database? .................................................................19

Question 9c: How do you plan on backing up your Oracle database?...............................................................19