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继续前一个要点,为了有效使用 mmap,Elasticsearch 还要求能够创建许多内存映射区域。最大映射计数检查会检查内核是否允许进程至少拥有 262,144 个内存映射区域,并且仅在 Linux 上强制执行。要通过最大映射计数检查,您必须通过 sysctl 将 vm.max_map_count 配置为至少 262144。
mmap
sysctl
vm.max_map_count
262144
或者,只有当您使用 mmapfs 或 hybridfs 作为索引的存储类型时,才需要进行最大映射计数检查。如果您不允许使用 mmap,则不会强制执行此启动检查。
mmapfs
hybridfs
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