Shaofeng SHI created KYLIN-1048:
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Summary: CPU and memory killer in Cuboid.findById()
Key: KYLIN-1048
URL: https://issues.apache.org/jira/browse/KYLIN-1048
Project: Kylin
Issue Type: Improvement
Components: Metadata
Affects Versions: v0.7.1, v0.7.2, v1.0
Reporter: Shaofeng SHI
Assignee: Shaofeng SHI
In an cube which has 37 dimensions with a couple of aggregation groups (and
each group has hierarchy), when a SQL which has columns cross aggregation
groups, it couldn't be returned in time, the CPU will very high and memory
usage increases also, finally cause Kylin server crashed with OutOfMemory error.
After doing some analysis and profiling, identified that when the cube is a
sparse partial cube, the performance in Cuboid.findById() is bad, which will
take much CPU and memory.
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