Host Metrics
| Measures the rate of asserts for a MongoDB process, as collected
from 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
serverStatus command's
wiredTiger.cache and
wiredTiger.concurrentTransactions documents. |
| Measures connections to a MongoDB process, as collected from the
MongoDB serverStatus command's
connections document. |
| Measures the number of cursors for a
MongoDB process, as collected from the MongoDB
serverStatus command's metrics.cursor
document. |
| Measures the database's on-disk storage space, as collected from
the 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 What is MongoDB Atlas Search? processes, in bytes. |
| Disk space in use by What is MongoDB Atlas Search? indexes, in bytes. |
| Percentage of CPU in use by What is MongoDB 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
command. |
| CPU usage of processes on the host server, scaled to a range of
0-100% by dividing by the number of CPU cores. |