Hadoop - Performance Tuning
You want to optimize a Hadoop cluster with 64 GB RAM per node. If each container requires 4 GB memory and 2 GB heap size, how many containers can run simultaneously without exceeding heap limits?
You want to optimize a Hadoop cluster with 64 GB RAM per node. If each container requires 4 GB memory and 2 GB heap size, how many containers can run simultaneously without exceeding heap limits?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate max containers by total memory
64 GB total / 4 GB per container = 16 containers max by memory.Step 2: Check heap size per container
Heap size 2 GB fits within 4 GB container memory, so no heap limit issue.Final Answer:
16 containers -> Option AQuick Check:
Containers limited by container memory, heap fits inside [OK]
Quick Trick: Containers = total RAM / container memory if heap fits [OK]
Common Mistakes:
- Dividing total RAM by heap size instead of container memory
- Ignoring heap size fitting inside container memory
- Choosing more containers than memory allows
Master "Performance Tuning" in Hadoop
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