主机指标

`ASSERT_REGULAR` `ASSERT_WARNING` `ASSERT_MSG` `ASSERT_USER`	Measures the rate of asserts for a MongoDB process, as collected from the MongoDB `serverStatus` command's `asserts` document.
`BACKGROUND_FLUSH_AVG`	在后台刷新的数据量。
`CACHE_BYTES_READ_INTO` `CACHE_BYTES_WRITTEN_FROM`	Applies to a MongoDB process's WiredTiger storage engine, as collected from the MongoDB `serverStatus` command's `wiredTiger.cache` and `queues.execution` documents.
`CACHE_DIRTY_BYTES` `CACHE_USED_BYTES`	缓存在内存中用于读取和写入的脏数据或已用字节总数。
`CONNECTIONS` `CONNECTIONS_PERCENT`	Measures connections to a MongoDB process, as collected from the MongoDB `serverStatus` command's `connections` document.
`CURSORS_TOTAL_OPEN` `CURSORS_TOTAL_TIMED_OUT` `CURSORS_TOTAL_CLIENT_CURSORS_SIZE`	Measures the number of cursors for a MongoDB process, as collected from the MongoDB `serverStatus` command's `metrics.cursor` document.
`DB_DATA_SIZE_TOTAL`	所有数据库（包括系统数据库）中未压缩文档数据的总和（以字节为单位）。
`DB_STORAGE_TOTAL`	为所有数据库中的文档存储分配的压缩磁盘存储空间的总和。 Atlas 默认下每 20 分钟检索一次数据库指标，但会在必要时调整频率以减少对数据库性能的影响。
`DB_INDEX_SIZE_TOTAL`	所有数据库中索引数据的逻辑大小总和（以字节为单位）（包括前缀压缩）。
`DB_DATA_SIZE_TOTAL_WO_SYSTEM`	非系统数据库中未压缩文档数据的总和（以字节为单位）。
`LOGICAL_SIZE`	集群数据的逻辑大小。
`DISK_PARTITION_SPACE_USED_DATA` `DISK_PARTITION_READ_IOPS_DATA` `DISK_PARTITION_WRITE_IOPS_DATA` `DISK_PARTITION_READ_LATENCY_DATA` `DISK_PARTITION_WRITE_LATENCY_DATA`	不同类型 MongoDB 数据的分区测量值。
`MAX_DISK_PARTITION_SPACE_USED_DATA` `MAX_DISK_PARTITION_READ_IOPS_DATA` `MAX_DISK_PARTITION_WRITE_IOPS_DATA` `MAX_DISK_PARTITION_READ_LATENCY_DATA` `MAX_DISK_PARTITION_WRITE_LATENCY_DATA`	不同类型 MongoDB 数据的分区测量值的最大值。
`DISK_PARTITION_QUEUE_DEPTH_DATA`	向 MongoDB 使用的磁盘分区发出的请求队列的平均长度。
`MAX_DISK_PARTITION_QUEUE_DEPTH_DATA`	指标颗粒度指定的时间段内的最大磁盘队列深度值。磁盘队列深度是向 MongoDB 使用的磁盘分区发出的请求队列的平均长度。
`DOCUMENT_RETURNED` `DOCUMENT_INSERTED` `DOCUMENT_UPDATED` `DOCUMENT_DELETED`	所选时间段内每秒返回、插入、更新或删除的文档的平均速率。
`EXTRA_INFO_PAGE_FAULTS` `GLOBAL_ACCESSES_NOT_IN_MEMORY` `GLOBAL_PAGE_FAULT_EXCEPTIONS_THROWN`	与主机相关的页面错误测量值。
`FTS_MEMORY_RESIDENT` `FTS_MEMORY_VIRTUAL` `FTS_MEMORY_SHARED` `FTS_CURRENT_MEMORY` `FTS_MAX_MEMORY`	Memory usage for MongoDB Search processes, in bytes.
`FTS_PROCESS_CPU_USER` `FTS_PROCESS_CPU_KERNEL` `FTS_PROCESS_DISK` `NORMALIZED_FTS_PROCESS_CPU_USER` `NORMALIZED_FTS_PROCESS_CPU_KERNEL`	Percentage of CPU in use by MongoDB Search processes.
`GLOBAL_LOCK_CURRENT_QUEUE_TOTAL` `GLOBAL_LOCK_CURRENT_QUEUE_READERS` `GLOBAL_LOCK_CURRENT_QUEUE_WRITERS` `GLOBAL_LOCK_PERCENTAGE`	Measures operations waiting on locks, as collected from the MongoDB `serverStatus` command.
`INDEX_COUNTERS_BTREE_ACCESSES` `INDEX_COUNTERS_BTREE_HITS` `INDEX_COUNTERS_BTREE_MISSES` `INDEX_COUNTERS_BTREE_MISS_RATIO`	Measurements concerning B-tree index activity.
`JOURNALING_COMMITS_IN_WRITE_LOCK` `JOURNALING_MB` `JOURNALING_WRITE_DATA_FILES_MB`	Measurements concerning journaling activity.
`MEMORY_RESIDENT` `MEMORY_VIRTUAL` `MEMORY_MAPPED` `COMPUTED_MEMORY`	Measures memory for a MongoDB process, as collected from the MongoDB `serverStatus` command's `mem` document.
`MUNIN_CPU_USER` `MUNIN_CPU_NICE` `MUNIN_CPU_SYSTEM` `MUNIN_CPU_IOWAIT` `MUNIN_CPU_IRQ` `MUNIN_CPU_SOFTIRQ` `MUNIN_CPU_STEAL`	有关 munin-node CPU 活动的测量值。
`NETWORK_BYTES_IN` `NETWORK_BYTES_OUT` `NETWORK_NUM_REQUESTS`	Measures throughput for MongoDB process, as collected from the MongoDB `serverStatus` command's `network` document.
`OPCOUNTER_CMD` `OPCOUNTER_QUERY` `OPCOUNTER_UPDATE` `OPCOUNTER_DELETE` `OPCOUNTER_GETMORE` `OPCOUNTER_INSERT`	Measures the rate of database operations on a MongoDB process since the process last started, as collected from the MongoDB `serverStatus` command's `opcounters` document.
`OPCOUNTER_REPL_CMD` `OPCOUNTER_REPL_UPDATE` `OPCOUNTER_REPL_DELETE` `OPCOUNTER_REPL_INSERT`	Measures the rate of database operations on MongoDB secondaries, as collected from the MongoDB `serverStatus` command's `opcountersRepl` document.
`OPERATIONS_SCAN_AND_ORDER`	在选定的时间段内，执行排序但无法使用索引执行排序的操作的平均每秒速率。
`AVG_READ_EXECUTION_TIME` `AVG_WRITE_EXECUTION_TIME` `AVG_COMMAND_EXECUTION_TIME`	所选时间段内每次读取、写入或命令操作的执行时间（以毫秒为单位）。
`OPLOG_MASTER_TIME` `OPLOG_MASTER_TIME_ESTIMATED_TTL` `OPLOG_REPLICATION_LAG_TIME` `OPLOG_MASTER_LAG_TIME_DIFF` `OPLOG_RATE_GB_PER_HOUR`	适用于 MongoDB 进程的oplog 的测量值。 `OPLOG_REPLICATION_LAG_TIME` 是用于测量 oplog 复制延迟的支持指标名称。旧版指标名称 `OPLOG_SLAVE_LAG_MASTER_TIME` 已弃用。
`QUERY_EXECUTOR_SCANNED`	Average rate per second to scan index items during queries and query-plan evaluations. This rate is driven by the same value as `totalKeysExamined` in the output of `explain`. This measurement is found on the host's `Query Executor` chart, accessed when viewing metrics.
`QUERY_EXECUTOR_SCANNED_OBJECTS`	Average rate per second to scan documents during queries and query-plan evaluations. Atlas derives the rate using the `explain` output's `totalDocsExamined` value. This measurement is found on the host's `Query Executor` chart, accessed when viewing metrics.
`QUERY_TARGETING_SCANNED_PER_RETURNED`	扫描的索引项数与返回的文档数的比率。此测量值可在主机的`Query Targeting`图表上找到，可在查看指标时访问该图表。 The change streams cursors that the MongoDB Search process (`mongot`) uses to keep MongoDB Search indexes updated can contribute to the query targeting ratio and trigger query targeting alerts if the ratio is high.
`QUERY_TARGETING_SCANNED_OBJECTS_PER_RETURNED`	扫描的文档数量与返回的文档数量的比率。此测量值可在主机的`Query Targeting`图表上找到，可在查看指标时访问该图表。 The change streams cursors that the MongoDB Search process (`mongot`) uses to keep MongoDB Search indexes updated can contribute to the query targeting ratio and trigger query targeting alerts if the ratio is high.
`SEARCH_INDEX_SIZE`	磁盘上所有索引的总大小（以字节为单位）。
`SEARCH_NUMBER_OF_FIELDS_IN_INDEX`	MongoDB搜索索引中存在的唯一字段总数。
`SEARCH_REPLICATION_LAG`	Approximate number of milliseconds that MongoDB Search is behind in replicating changes from the oplog of `mongod`.
`SEARCH_OPCOUNTER_INSERT` `SEARCH_OPCOUNTER_DELETE` `SEARCH_OPCOUNTER_UPDATE` `SEARCH_OPCOUNTER_GETMORE`	MongoDB搜索操作总数。
`SEARCH_NUMBER_OF_QUERIES_TOTAL` `SEARCH_NUMBER_OF_QUERIES_ERROR` `SEARCH_NUMBER_OF_QUERIES_SUCCESS`	每种状态的MongoDB Search 查询总数。
`SWAP_USAGE_USED` `SWAP_USAGE_FREE` `MAX_SWAP_USAGE_USED` `MAX_SWAP_USAGE_FREE`	已用和可用交换空间，以字节为单位。
`SYSTEM_MEMORY_USED` `SYSTEM_MEMORY_FREE` `SYSTEM_MEMORY_PERCENT_USED`	系统正在使用且可用的物理内存的字节数。
`MAX_SYSTEM_MEMORY_USED` `MAX_SYSTEM_MEMORY_FREE` `MAX_SYSTEM_MEMORY_PERCENT_USED`	最大系统内存值（以字节为单位）。
`SYSTEM_MEMORY_AVAILABLE` `MAX_SYSTEM_MEMORY_AVAILABLE`	在不进行交换的情况下，可用于运行新应用程序的系统内存字节数的估计值。
`SYSTEM_NETWORK_IN` `SYSTEM_NETWORK_OUT`	`eth0`网络接口每秒接收和传输的物理字节的平均速率。
`MAX_SYSTEM_NETWORK_IN` `MAX_SYSTEM_NETWORK_OUT`	在所选样本周期内每秒向此数据库服务器发送或从该数据库服务器发送的物理字节（经过任何线路压缩后）的平均速率的最大值。
`TICKETS_AVAILABLE_READS` `TICKETS_AVAILABLE_WRITES`	Measurement of the WiredTiger storage engine `wiredTiger.cache` and `queues.execution` documents as collected from the MongoDB `serverStatus` command.
`NORMALIZED_SYSTEM_CPU_USER`	托管服务器上进程的用户模式 CPU 使用率，按核心标准化，范围为 0-100%。在可突发的实例类型上，当 CPU 信用耗尽且硬件限制开始时，该值可能低于进程的实际 CPU 需求。
`NORMALIZED_SYSTEM_CPU_STEAL`	虚拟机监控程序从虚拟机中扣留的 CPU 时间，按内核进行标准化，范围为 0-100%。在可突发的实例类型上，当 CPU 信用耗尽并且云提供商开始限制实例时，该值会增加。
`MAX_NORMALIZED_SYSTEM_CPU_USER`	节点上所有进程的最大用户模式 CPU 使用率，按核心标准化，范围为 0-100%。在可突发的实例类型上，当 CPU 信用耗尽且硬件限制开始时，该值可能低于实际 CPU 需求。
`MAX_NORMALIZED_SYSTEM_CPU_STEAL`	节点上所有进程的最大 CPU 窃取时间，按核心标准化，范围为 0-100%。在可突发的实例类型上，当 CPU 信用耗尽并且云提供商开始限制实例时，该值会增加。

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