hostInfo

~~On this page~~本页内容

~~Output~~输出

hostInfo

~~Returns:~~返回：	~~A document with information about the underlying system that the `mongod` or `mongos` runs on.~~ 包含`mongod`或`mongos`运行的底层系统信息的文档。~~Some of the returned fields are only included on some platforms.~~某些返回的字段仅包含在某些平台上。

~~You must run the hostInfo command, which takes no arguments, against the admin database.~~ 您必须对admin数据库运行hostInfo命令，该命令不接受任何参数。~~Consider the following invocations of hostInfo:~~考虑以下hostInfo调用：

db.hostInfo()
db.adminCommand( { "hostInfo" : 1 } )

~~In mongosh you can use db.hostInfo() as a helper to access hostInfo.~~ 在mongosh中，您可以使用db.hostInfo()作为访问hostInfo的助手。~~The output of hostInfo on a Linux system will resemble the following:~~Linux系统上hostInfo的输出如下所示：

{
   "system" : {
          "currentTime" : ISODate("<timestamp>"),
          "hostname" : "<hostname>",
          "cpuAddrSize" : <number>,
          "memSizeMB" : <number>,
          "memLimitMB" : <number>,  // Available starting in MongoDB 4.0.9 (and 3.6.13)
          "numCores" : <number>,
          "cpuArch" : "<identifier>",
          "numaEnabled" : <boolean>
   },
   "os" : {
          "type" : "<string>",
          "name" : "<string>",
          "version" : "<string>"
   },
   "extra" : {
          "versionString" : "<string>",
          "libcVersion" : "<string>",
          "kernelVersion" : "<string>",
          "cpuFrequencyMHz" : "<string>",
          "cpuFeatures" : "<string>",
          "pageSize" : <number>,
          "numPages" : <number>,
          "maxOpenFiles" : <number>
   },
   "ok" : <return>
}

Output输出

hostInfo: ~~The document returned by the hostInfo.~~hostInfo返回的文档。

hostInfo.system: ~~An embedded document providing information about the underlying environment of the system running the mongod or mongos~~提供运行mongod或mongos的系统底层环境信息的嵌入式文档

hostInfo.system.currentTime: ~~A timestamp of the current system time.~~当前系统时间的时间戳。

hostInfo.system.hostname: ~~The system name, which should correspond to the output of hostname -f on Linux systems.~~系统名，在Linux系统上应与hostname -f的输出相对应。

hostInfo.system.cpuAddrSize: ~~A number reflecting the architecture of the system.~~ 反映系统架构的数字。~~Either 32 or 64.~~32或64。

hostInfo.system.memSizeMB: ~~The total amount of system memory (RAM) in megabytes.~~以兆字节为单位的系统内存（RAM）总量。

hostInfo.system.memLimitMB

~~The memory usage limit in megabytes.~~内存使用限制（MB）。

~~For example, running in a container may impose memory limits that are lower than the total system memory.~~ 例如，在容器中运行可能会施加低于系统总内存的内存限制。~~This memory limit, rather than the total system memory, is used as the maximum RAM available to calculate WiredTiger internal cache.~~此内存限制（而不是总系统内存）用作计算WiredTiger内部缓存的最大可用RAM。

~~Available starting in MongoDB 4.0.9 (and 3.6.13)~~从MongoDB 4.0.9（和3.6.13）开始提供

hostInfo.system.numCores: ~~The total number of available logical processor cores.~~可用逻辑处理器内核的总数。

hostInfo.system.cpuArch: ~~A string that represents the system architecture.~~ 表示系统体系结构的字符串。~~Either x86 or x86_64.~~x86或x86_64。

hostInfo.system.numaEnabled: ~~A boolean value.~~ 布尔值。~~false if NUMA is interleaved (i.e. disabled), otherwise true.~~如果NUMA交错（即禁用），则为false，否则为true。

hostInfo.os: ~~An embedded document that contains information about the operating system running the mongod and mongos.~~包含运行mongod和mongos的操作系统信息的嵌入式文档。

hostInfo.os.type: ~~A string representing the type of operating system, such as Linux or Windows.~~表示操作系统类型的字符串，如Linux或Windows。

hostInfo.os.name: ~~If available, returns a display name for the operating system.~~如果可用，则返回操作系统的显示名称。

hostInfo.os.version: ~~If available, returns the name of the distribution or operating system.~~如果可用，则返回分发或操作系统的名称。

hostInfo.extra: ~~An embedded document with extra information about the operating system and the underlying hardware.~~ 包含有关操作系统和底层硬件的额外信息的嵌入式文档。~~The content of the extra embedded document depends on the operating system.~~extra额外嵌入文档的内容取决于操作系统。

hostInfo.extra.cpuString

~~A string containing a human-readable description of the system's processor.~~包含系统处理器的可读描述的字符串。

cpuString ~~only appears on macOS systems.~~仅出现在macOS系统上。

hostInfo.extra.versionString: ~~A complete string of the operating system version and identification.~~ 操作系统版本和标识的完整字符串。~~On Linux and macOS systems, this contains output similar to uname -a.~~在Linux和macOS系统上，这包含与uname -a类似的输出。

hostInfo.extra.libcVersion

~~The release of the system libc.~~系统libc的发布。

libcVersion ~~only appears on Linux systems.~~仅在Linux系统上出现。

hostInfo.extra.kernelVersion

~~The release of the Linux kernel in current use.~~当前使用的Linux内核版本。

kernelVersion ~~only appears on Linux systems.~~仅在Linux系统上显示。

hostInfo.extra.alwaysFullSync: alwaysFullSync ~~only appears on macOS systems.~~仅出现在macOS系统上。

hostInfo.extra.nfsAsync: nfsAsync ~~only appears on macOS systems.~~仅出现在macOS系统上。

hostInfo.extra.cpuFrequencyMHz: ~~Reports the clock speed of the system's processor in megahertz.~~以兆赫为单位报告系统处理器的时钟速度。

hostInfo.extra.cpuFeatures: ~~Reports the processor feature flags.~~ 报告处理器功能标志。~~On Linux systems this the same information that /proc/cpuinfo includes in the flags fields.~~在Linux系统上，这与/proc/cpuinfo在标志字段中包含的信息相同。

hostInfo.extra.pageSize: ~~Reports the default system page size in bytes.~~报告默认系统页面大小（以字节为单位）。

hostInfo.extra.physicalCores

~~Reports the number of physical, non-HyperThreading, cores available on the system.~~报告系统上可用的物理非超线程内核数。

physicalCores ~~only appears on macOS systems.~~仅出现在macOS系统上。

hostInfo.extra.numPages: numPages ~~only appears on Linux systems.~~仅在Linux系统上出现。

hostInfo.extra.maxOpenFiles

~~Reports the current system limits on open file handles.~~ 报告打开文件句柄的当前系统限制。~~See UNIX ulimit Settings for more information.~~有关详细信息，请参阅UNIX ulimit设置。

maxOpenFiles ~~only appears on Linux systems.~~仅在Linux系统上出现。

hostInfo.extra.scheduler: ~~Reports the active I/O scheduler.~~ 报告活动的I/O调度器。scheduler ~~only appears on OS X systems.~~仅出现在OS X系统上。

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