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Presto coordinator is utilizing a lot of CPU when deployed on hardware with a lot of cpu. When we took a cpu profile, we identified that MappedByteBufferPool/ConcurrentLinkedDeque operations are a major contributor.
@arhimondr identified that is a issue with ByteBufferPool implementation in Jetty.
jetty/jetty.project#6379
This is fixed in Jetty 9.4.55 version.