Properties on MongoDB Instances


Properties are grouped below by topic.

Activity and utilization

Name Description Typical values
active_session_count The number of active sessions on the instance
activity Overall activity score
activity_active_sessions The current active session count
activity_active_sessions_score A score derived from the active session count
activity_cpu_count Number of CPU cores
activity_latency_reads Read latency per second
activity_latency_reads_counter Current read latency counter
activity_latency_reads_lasttime Last read latency sample time in milliseconds since 1970
activity_latency_reads_score A score derived from read latency
activity_latency_writes Write latency per second
activity_latency_writes_counter Current write latency counter
activity_latency_writes_lasttime Last write latency sample time in milliseconds since 1970
activity_latency_writes_score A score derived from write latency
activity_logical_reads Logical reads per second
activity_logical_reads_counter Current logical reads counter
activity_logical_reads_dif_counter Delta in logical reads
activity_logical_reads_last_counter Previous logical reads counter
activity_logical_reads_lasttime Last logical read sample time in milliseconds since 1970
activity_logical_reads_score A score derived from logical reads
activity_network_bytesIn Network bytes in per second
activity_network_bytesIn_counter Current network bytes in counter
activity_network_bytesIn_dif_counter Delta in network bytes in
activity_network_bytesIn_last_counter Previous network bytes in counter
activity_network_bytesIn_lasttime Last network bytes in sample time in milliseconds since 1970
activity_network_bytesIn_score A score derived from network bytes in
activity_network_bytesOut Network bytes out per second
activity_network_bytesOut_counter Current network bytes out counter
activity_network_bytesOut_dif_counter Delta in network bytes out
activity_network_bytesOut_last_counter Previous network bytes out counter
activity_network_bytesOut_lasttime Last network bytes out sample time in milliseconds since 1970
activity_network_bytesOut_score A score derived from network bytes out
activity_total_sessions The total number of sessions on the instance
disk_usage The approximate disk usage (in GB) for the instance 45.3
inactive_session_count The number of inactive sessions on the instance
sec_after_1970 Seconds since 1970
total_session_count The total number of sessions on the instance 12, 432

Database and instance metadata

Name Description Typical values
buildinfo Build information
db_count The number of databases on the instance 23
dbhost Database host name
edition The edition of the instance Standard Edition, Enterprise Edition
edition_old Legacy edition string
hostinfo Host information
instance_started_sec_1970 Instance start time in seconds since 1970
is_writable_primary Whether the node is a writable primary
maj_version Major MongoDB version
os_info Operating system information
platform_info Platform and version info
started A text representation of the start time for the instance 21.10.2020 11:39:16, 11.10.2023 11:47:08
version MongoDB version

Replica set and sharding

Name Description Typical values
is_secondary Whether the node is secondary
is_sharded Whether the deployment is sharded
listshards List of shards
replsetgetstatus Replica set status

Parameters and commands

Name Description Typical values
connpoolstats Connection pool statistics
getparameter Server parameters
getparameter_maxsessions Max sessions parameter
listdatabases Database list
param_maxsessions Maximum sessions
param_maxsessions_x
serverstatus Server status

Storage and resources

Name Description Typical values
disk_usage_test
memory_usage The approximate memory usage (in MB) for the instance 2450
memory_usage_bytes Current allocated memory in bytes