Hi,
10.2.0.4, 2 node RAC, 46 cpus.
This is the top 5 wait event:
Event Waits Time(s) Avg Wait(ms) % Total Call Time Wait Class
gc buffer busy 43,290,187 203,760 5 40.0 Cluster
db file sequential read 21,219,473 92,498 4 18.2 User I/O
gc cr grant 2-way 10,549,302 52,277 5 10.3 Cluster
CPU time 35,938 7.1
gc current block 2-way 6,629,680 30,450 5 6.0 Cluster
If i sum up 40.0+18.2+10.3+7.1+6=81.6. where is the remaining 18.4%?
Thanks