Question-122: Which all below are the recommendation for the Java GC tuning in the Cassandra cluster node?
- Heap size should be always between ¼ and ½ of the available memory (RAM) on the node.
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Ans : A,C,D
Exp : GC settings and tuning is very critical for the Cassandra cluster, Hence, setting Java Heap size more than 32GB may interfere with the OS page cache. Operating systems that maintain the OS page cache for frequently accessed data are very good at keeping this data in memory. Properly tuning the OS page cache usually results in better performance that increasing the row cache, there are some guidelines you need to follow while tuning the GC.
- Heap size which is usually between ¼ and ½ of system memory and should not be larger than 32 GB
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