参考文档:
https://docs.oracle.com/cd/E11882_01/server.112/e41573/instance_tune.htm#PFGRF94465
10.2.3 Table of Wait Events and Potential Causes
Table 10-1 links wait events to possible causes and gives an overview of the Oracle data that could be most useful to review next.
Table 10-1 Wait Events and Potential Causes
You may also want to review the My Oracle Support notices on buffer
busy
waits
(34405.1) and free
buffer
waits
(62172.1). You can also access these notices and related notices by searching for "busy buffer waits" and "free buffer waits" at: