9.2.0.8 AIX RAC database. "global cache cr request"
In top 5 wait events "global cache cr request" constitutes more than 50% of total wait events on both the nodes.
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~ % Total
Event Waits Time (s) Ela Time
-------------------------------------------- ------------ ----------- --------
global cache cr request 2,573,964 66,591 54.66
db file sequential read 3,446,319 35,953 29.51
CPU time 6,938 5.70
buffer busy global CR 104,478 3,067 2.52
buffer busy waits 152,072 2,314 1.90
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Cluster Statistics for DB: DMS Instance: DMS1 Snaps: 18928 -18929
Global Cache Service - Workload Characteristics
-----------------------------------------------
Ave global cache get time (ms): 13.1
Ave global cache convert time (ms): 33.4
Ave build time for CR block (ms): 0.0
Ave flush time for CR block (ms): 0.2