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使用hadoop时,set dfs.namenode.handler.count = 8000,
set dfs.namenode.handler.count = 8000,
1> 是的
2> 是的,它将创建 8000 个线程,这将花费你 16G 内存。这样做会增加 namenode 的内存利用率,但这可能会由于元数据更新的 I/O 争用而导致性能下降。