Host Metrics¶
| Measures the rate of asserts for a MongoDB process, as collected
fdbcommand the MongoDB serverStatus command's
asserts document. |
| Amount of data flushed in the background. |
| Applies to a MongoDB process's WiredTiger storage engine, as collected from the MongoDB :manual:dbcommand` command's wiredTiger.cache and
wiredTiger.concurrentTransactions documents. |
| Measures connections to a MongoDB process, as collected from the
Mdbcommand serverStatus
command's connections document. |
| Measures the number of cursors for a MongoDB process, as collected from the MongoDB sdbcommand command's metrics.cursor document. |
| Measures the database's on-disk storage space, as collected from tdbcommand MongoDB dbStats command. |
| Logical size of cluster data. |
| Measurements on the amount of disk space used on partitions containing different types of MongoDB data. |
| Average rate per second of documents returned, inserted, updated, or deleted for a selected time period. |
| Measurements on page faults related to the host. |
| Memory usage for Atlas Search processes, in bytes. |
| Disk space in use by Atlas Search indexes, in bytes. |
| Percentage of CPU in use by Atlas Search processes. |
| Measures operations waiting on locks, as collected from the MongoDB
serverStatus command. |
| Measurements concerning b-tree index activity. |
| Measurements concerning journaling activity. |
| Measures memory for a MongoDB process, as collected from the
MongoDB
serverStatus command's
mem document. |
| Measurements concerning munin-node CPU activity. |
| Measures throughput for MongoDB process, as collected from the
MongoDB
serverStatus command's
network document. |
| 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. |
| Measures the rate of database operations on MongoDB
secondaries, as collected from the MongoDB
serverStatus command's
opcountersRepl document. |
| For a selected time period, the average rate per second for operations that perform a sort but cannot perform the sort using an index. |
| Available to hosts running MongoDB 3.6 or later. The execution time in milliseconds per read, write, or command operation over the selected time period. |
| Measurements that apply to the MongoDB process's oplog. |
| 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. |
| 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. |
| Ratio of the number of index items scanned to the number of
documents returned. This measurement is found on the host's
Query Targeting chart, accessed when viewing metrics. |
| Ratio of the number of documents scanned to the number of
documents returned. This measurement is found on the host's
Query Targeting chart, accessed when viewing metrics. |
| Number of times the host restarted within the previous hour. |
| Swap space used and available, measured in bytes. |
| Number of bytes of physical memory in use and available to the system. |
| Estimate of the number of bytes of system memory available for running new applications, without swapping. |
| Average rate of physical bytes received and transmitted per second
by the eth0 network interface. |
| Measurement of the WiredTiger storage
engine wiredTiger.cache and wiredTiger.concurrentTransactions
documents as collected from the MongoDB serverStatus
dbcommand command. |
| CPU usage of processes on the host server, scaled to a range of 0-100% by dividing by the number of CPU cores. |
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