January 2018
Beginner to intermediate
234 pages
7h 8m
Chinese
Content preview from Kafka权威指南
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174
｜
第
10
章
定用处的。
Partition size
度量指标表示分区当前在磁盘上保留的数据量（见表
10-13
）。 如
果把它们组合在一起，就可以表示单个主题保留的数据量，作为客户端配额的依据。同一
个主题的两个不同分区之间的数据量如果存在差异，说明消息并没有按照生产消息的键
进行均匀分布。
Log se�ent count
指标表示保存在磁盘上的日志片段的文件数量，可以与
Partition size
指标结合起来，用于跟踪资源的使用情况。
表10-13：分区实例的度量指标
名称 JMX MBean
Partition size
kafka.log:type=Log,name=Size,topic=TOPICNAME,partition=0
Log se�ent count
kafka.log:type=Log,name=NumLogSegments,topic=TOPICNAME,partition=0
Log end offset
kafka.log:type=Log,name=LogEndOffset,topic=TOPICNAME,partition=0
Log start offset
kafka.log:type=Log,name=LogStartOffset,topic=TOPICNAME,partition=0
Log end offset
和
Log start offset
这两个度量指标分别表示消息的最大偏移量和最小偏移量。
不过需要注意的是，不能用这两个指标来推算分区的消息数量，因为日志压缩会导致偏移 ...
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