今天檢查彩民村的數據庫健康狀態，發現CPU使用率非常高，而且這個時間點的業務並不是很忙，開發人員也沒有對數據庫做大的操作。
分析AWR發現佔用資源比較大的sql很多都是重複的
Top 5 Timed Events
|
Event |
Waits |
Time(s) |
Avg Wait(ms) |
% Total Call Time |
Wait Class |
|
CPU time |
|
20,956 |
|
51.4 |
|
|
read by other session |
32,208,585 |
3,680 |
0 |
9.0 |
User I/O |
|
db file scattered read |
32,013,721 |
2,214 |
0 |
5.4 |
User I/O |
|
db file sequential read |
42,658,212 |
1,100 |
0 |
2.7 |
User I/O |
|
latch: cache buffers chains |
945,865 |
955 |
1 |
2.3 |
Concurrency |