Database - RAC/Scalability (MOSC)

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high waits gc cr block busy', 'gc cr block 2-way', 'gc cr block 3-way on ORACLE 4 NODES RAC

edited Nov 22, 2012 5:24AM in Database - RAC/Scalability (MOSC) 1 commentAnswered
from AWR report, it shows that i have high waits for ORACLE 4NODES RAC,

Top 5 Timed Events for only on instance.

Event Waits Time(s) Avg Wait(ms) % Total Call Time Wait Class CPU time   165   52.9   gc current block busy 4,069 116 29 37.2 Cluster log file sync 5,735 9 1 2.7 Commit gc current block 3-way 11,015 8 1 2.5 Cluster log file parallel write 9,170 7 1 2.2 System I/O

are this high waits noraml for oracle rac, what should i investigate further ?



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