First, the relevant technical preparations
1. About Memory: https: //blog.csdn.net/u013641333/article/details/82732526
PGA_AGGREGATE_TARGET 2. - This parameter is used to specify the total of all the session can use the maximum PGA memory. This parameter can be dynamically changed, the range from 10M - (4096G-1) bytes .
https://blog.csdn.net/shuaiyu133/article/details/7369001
2。WORKAREA_SIZE_POLICY
- This parameter is used to switch the automatic PGA memory management functions, this parameter has two options: AUTO and MANUAL, when set to AUTO, the database used to provide automatic PGA Oracle9i management function, when set to MANUAL, then still before use Oracle9i way manual management.
Default, Oracle9i in WORKAREA_SIZE_POLICY is set to AUTO.