ApacheFlume 10 true false "$ org.apache.flume.channel:type=* dynamic NA ChannelMetrics > type 1 equals ChannelCapacity 1 double 1 ChannelFillPercentage 1 double 2 ChannelSize 1 double 3 EventPutAttemptCount 1 double 4 EventPutSuccessCount 1 double 5 EventTakeAttemptCount 1 double 6 EventTakeSuccessCount 1 double 7