Mongodb

Mongodb

MongoDB is a source-available cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Server Side Public License.

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This template is for Zabbix version: 7.4

Source: https://git.zabbix.com/projects/ZBX/repos/zabbix/browse/templates/db/mongodb?at=release/7.4

MongoDB node by Zabbix agent 2

Overview

The template to monitor single MongoDB server by Zabbix that work without any external scripts. Most of the metrics are collected in one go, thanks to Zabbix bulk data collection.

MongoDB node by Zabbix Agent 2 — collects metrics by polling zabbix-agent2.

Requirements

Zabbix version: 7.4 and higher.

Tested versions

This template has been tested on:

  • MongoDB 4.0.21, 4.4.3

Configuration

Zabbix should be configured according to the instructions in the Templates out of the box section.

Setup

  1. Setup and configure zabbix-agent2 compiled with the MongoDB monitoring plugin.
  2. Set the {$MONGODB.CONNSTRING} such as <protocol(host:port)> or named session.
  3. Set the user name and password in host macros ({$MONGODB.USER}, {$MONGODB.PASSWORD}) if you want to override parameters from the Zabbix agent configuration file.

Note, depending on the number of DBs and collections discovery operation may be expensive. Use filters with macros {$MONGODB.LLD.FILTER.DB.MATCHES}, {$MONGODB.LLD.FILTER.DB.NOT_MATCHES}, {$MONGODB.LLD.FILTER.COLLECTION.MATCHES}, {$MONGODB.LLD.FILTER.COLLECTION.NOT_MATCHES}.

Test availability: zabbix_get -s mongodb.node -k 'mongodb.ping["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]"

Macros used

Name Description Default
{$MONGODB.CONNSTRING}

Connection string in the URI format (password is not used). This param overwrites a value configured in the "Server" option of the configuration file (if it's set), otherwise, the plugin's default value is used: "tcp://localhost:27017"

 tcp://localhost:27017
{$MONGODB.USER}

MongoDB username
{$MONGODB.PASSWORD}

MongoDB user password
{$MONGODB.CONNS.PCT.USED.MAX.WARN}

Maximum percentage of used connections

 80
{$MONGODB.CURSOR.TIMEOUT.MAX.WARN}

Maximum number of cursors timing out per second

 1
{$MONGODB.CURSOR.OPEN.MAX.WARN}

Maximum number of open cursors

 10000
{$MONGODB.REPL.LAG.MAX.WARN}

Maximum replication lag in seconds

 10s
{$MONGODB.LLD.FILTER.COLLECTION.MATCHES}

Filter of discoverable collections

 .*
{$MONGODB.LLD.FILTER.COLLECTION.NOT_MATCHES}

Filter to exclude discovered collections

 CHANGE_IF_NEEDED
{$MONGODB.LLD.FILTER.DB.MATCHES}

Filter of discoverable databases

 .*
{$MONGODB.LLD.FILTER.DB.NOT_MATCHES}

Filter to exclude discovered databases

 (admin|config|local)
{$MONGODB.WIRED_TIGER.TICKETS.AVAILABLE.MIN.WARN}

Minimum number of available WiredTiger read or write tickets remaining

 5

Items

Name Description Type Key and additional info
Get server status

Returns a database's state.

 Zabbix agent mongodb.server.status["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]
Get Replica Set status

Returns the replica set status from the point of view of the member where the method is run.

 Zabbix agent mongodb.rs.status["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]
Get oplog stats

Returns status of the replica set, using data polled from the oplog.

 Zabbix agent mongodb.oplog.stats["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]
Ping

Test if a connection is alive or not.

 Zabbix agent mongodb.ping["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]

Preprocessing

  • Discard unchanged with heartbeat: 30m
Get collections usage stats

Returns usage statistics for each collection.

 Zabbix agent mongodb.collections.usage["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]
MongoDB version

Version of the MongoDB server.

 Zabbix agent mongodb.version["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]

Preprocessing

  • Discard unchanged with heartbeat: 12h
Uptime

Number of seconds that the mongod process has been active.

 Dependent item mongodb.uptime

Preprocessing

  • JSON Path: $.uptime
Asserts: message, rate

The number of message assertions raised per second.

Check the log file for more information about these messages.

 Dependent item mongodb.asserts.msg.rate

Preprocessing

  • JSON Path: $.asserts.msg

  • Change per second
Asserts: user, rate

The number of "user asserts" that have occurred per second.

These are errors that user may generate, such as out of disk space or duplicate key.

 Dependent item mongodb.asserts.user.rate

Preprocessing

  • JSON Path: $.asserts.user

  • Change per second
Asserts: warning, rate

The number of warnings raised per second.

 Dependent item mongodb.asserts.warning.rate

Preprocessing

  • JSON Path: $.asserts.warning

  • Change per second
Asserts: regular, rate

The number of regular assertions raised per second.

Check the log file for more information about these messages.

 Dependent item mongodb.asserts.regular.rate

Preprocessing

  • JSON Path: $.asserts.regular

  • Change per second
Asserts: rollovers, rate

Number of times that the rollover counters roll over per second.

The counters rollover to zero every 2^30 assertions.

 Dependent item mongodb.asserts.rollovers.rate

Preprocessing

  • JSON Path: $.asserts.rollovers

  • Change per second
Active clients: writers

The number of active client connections performing write operations.

 Dependent item mongodb.active_clients.writers

Preprocessing

  • JSON Path: $.globalLock.activeClients.writers
Active clients: readers

The number of the active client connections performing read operations.

 Dependent item mongodb.active_clients.readers

Preprocessing

  • JSON Path: $.globalLock.activeClients.readers
Active clients: total

The total number of internal client connections to the database including system threads as well as queued readers and writers.

 Dependent item mongodb.active_clients.total

Preprocessing

  • JSON Path: $.globalLock.activeClients.total
Current queue: writers

The number of operations that are currently queued and waiting for the write lock.

A consistently small write-queue, particularly of shorter operations, is no cause for concern.

 Dependent item mongodb.current_queue.writers

Preprocessing

  • JSON Path: $.globalLock.currentQueue.writers
Current queue: readers

The number of operations that are currently queued and waiting for the read lock.

A consistently small read-queue, particularly of shorter operations, should cause no concern.

 Dependent item mongodb.current_queue.readers

Preprocessing

  • JSON Path: $.globalLock.currentQueue.readers
Current queue: total

The total number of operations queued waiting for the lock.

 Dependent item mongodb.current_queue.total

Preprocessing

  • JSON Path: $.globalLock.currentQueue.total
Operations: command, rate

The number of commands issued to the database the mongod instance per second.

Counts all commands except the write commands: insert, update, and delete.

 Dependent item mongodb.opcounters.command.rate

Preprocessing

  • JSON Path: $.opcounters.command

  • Change per second
Operations: delete, rate

The number of delete operations the mongod instance per second.

 Dependent item mongodb.opcounters.delete.rate

Preprocessing

  • JSON Path: $.opcounters.delete

  • Change per second
Operations: update, rate

The number of update operations the mongod instance per second.

 Dependent item mongodb.opcounters.update.rate

Preprocessing

  • JSON Path: $.opcounters.update

  • Change per second
Operations: query, rate

The number of queries received the mongod instance per second.

 Dependent item mongodb.opcounters.query.rate

Preprocessing

  • JSON Path: $.opcounters.query

  • Change per second
Operations: insert, rate

The number of insert operations received since the mongod instance per second.

 Dependent item mongodb.opcounters.insert.rate

Preprocessing

  • JSON Path: $.opcounters.insert

  • Change per second
Operations: getmore, rate

The number of "getmore" operations since the mongod instance per second. This counter can be high even if the query count is low.

Secondary nodes send getMore operations as part of the replication process.

 Dependent item mongodb.opcounters.getmore.rate

Preprocessing

  • JSON Path: $.opcounters.getmore

  • Change per second
Connections, current

The number of incoming connections from clients to the database server.

This number includes the current shell session.

 Dependent item mongodb.connections.current

Preprocessing

  • JSON Path: $.connections.current
New connections, rate

Rate of all incoming connections created to the server.

 Dependent item mongodb.connections.rate

Preprocessing

  • JSON Path: $.connections.totalCreated

  • Change per second
Connections, available

The number of unused incoming connections available.

 Dependent item mongodb.connections.available

Preprocessing

  • JSON Path: $.connections.available
Connections, active

The number of active client connections to the server.

Active client connections refers to client connections that currently have operations in progress.

Available starting in 4.0.7, 0 for older versions.

 Dependent item mongodb.connections.active

Preprocessing

  • JSON Path: $.connections.active

    ⛔️Custom on fail: Discard value
Bytes in, rate

The total number of bytes that the server has received over network connections initiated by clients or other mongod/mongos instances per second.

 Dependent item mongodb.network.bytes_in.rate

Preprocessing

  • JSON Path: $.network.bytesIn

  • Change per second
Bytes out, rate

The total number of bytes that the server has sent over network connections initiated by clients or other mongod/mongos instances per second.

 Dependent item mongodb.network.bytes_out.rate

Preprocessing

  • JSON Path: $.network.bytesOut

  • Change per second
Requests, rate

Number of distinct requests that the server has received per second

 Dependent item mongodb.network.numRequests.rate

Preprocessing

  • JSON Path: $.network.numRequests

  • Change per second
Document: deleted, rate

Number of documents deleted per second.

 Dependent item mongod.document.deleted.rate

Preprocessing

  • JSON Path: $.metrics.document.deleted

  • Change per second
Document: inserted, rate

Number of documents inserted per second.

 Dependent item mongod.document.inserted.rate

Preprocessing

  • JSON Path: $.metrics.document.inserted

  • Change per second
Document: returned, rate

Number of documents returned by queries per second.

 Dependent item mongod.document.returned.rate

Preprocessing

  • JSON Path: $.metrics.document.returned

  • Change per second
Document: updated, rate

Number of documents updated per second.

 Dependent item mongod.document.updated.rate

Preprocessing

  • JSON Path: $.metrics.document.updated

  • Change per second
Cursor: open no timeout

Number of open cursors with the option DBQuery.Option.noTimeout set to prevent timeout after a period of inactivity.

 Dependent item mongodb.metrics.cursor.open.no_timeout

Preprocessing

  • JSON Path: $.metrics.cursor.open.noTimeout
Cursor: open pinned

Number of pinned open cursors.

 Dependent item mongodb.cursor.open.pinned

Preprocessing

  • JSON Path: $.metrics.cursor.open.pinned
Cursor: open total

Number of cursors that MongoDB is maintaining for clients.

 Dependent item mongodb.cursor.open.total

Preprocessing

  • JSON Path: $.metrics.cursor.open.total
Cursor: timed out, rate

Number of cursors that time out, per second.

 Dependent item mongodb.cursor.timed_out.rate

Preprocessing

  • JSON Path: $.metrics.cursor.timedOut

  • Change per second
Architecture

A number, either 64 or 32, that indicates whether the MongoDB instance is compiled for 64-bit or 32-bit architecture.

 Dependent item mongodb.mem.bits

Preprocessing

  • JSON Path: $.mem.bits

  • Discard unchanged with heartbeat: 3h
Memory: mapped

Amount of mapped memory by the database.

 Dependent item mongodb.mem.mapped

Preprocessing

  • JSON Path: $.mem.mapped

    ⛔️Custom on fail: Discard value

  • Custom multiplier: 1048576
Memory: mapped with journal

The amount of mapped memory, including the memory used for journaling.

 Dependent item mongodb.mem.mapped_with_journal

Preprocessing

  • JSON Path: $.mem.mappedWithJournal

    ⛔️Custom on fail: Discard value

  • Custom multiplier: 1048576
Memory: resident

Amount of memory currently used by the database process.

 Dependent item mongodb.mem.resident

Preprocessing

  • JSON Path: $.mem.resident

  • Custom multiplier: 1048576
Memory: virtual

Amount of virtual memory used by the mongod process.

 Dependent item mongodb.mem.virtual

Preprocessing

  • JSON Path: $.mem.virtual

  • Custom multiplier: 1048576

Triggers

Name Description Expression Severity Dependencies and additional info
MongoDB node: Connection to MongoDB is unavailable

Connection to MongoDB instance is currently unavailable.

 last(/MongoDB node by Zabbix agent 2/mongodb.ping["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"])=0 High
MongoDB node: Version has changed

MongoDB version has changed. Acknowledge to close the problem manually.

 last(/MongoDB node by Zabbix agent 2/mongodb.version["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"],#1)<>last(/MongoDB node by Zabbix agent 2/mongodb.version["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"],#2) and length(last(/MongoDB node by Zabbix agent 2/mongodb.version["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]))>0 Info Manual close: Yes
MongoDB node: mongod process has been restarted

Uptime is less than 10 minutes.

 last(/MongoDB node by Zabbix agent 2/mongodb.uptime)<10m Info Manual close: Yes
MongoDB node: Failed to fetch info data

Zabbix has not received data for items for the last 10 minutes

 nodata(/MongoDB node by Zabbix agent 2/mongodb.uptime,10m)=1 Warning Manual close: Yes
Depends on:
  • MongoDB node: Connection to MongoDB is unavailable
MongoDB node: Total number of open connections is too high

Too few available connections.
If MongoDB runs low on connections, in may not be able to handle incoming requests in a timely manner.

 min(/MongoDB node by Zabbix agent 2/mongodb.connections.current,5m)/(last(/MongoDB node by Zabbix agent 2/mongodb.connections.available)+last(/MongoDB node by Zabbix agent 2/mongodb.connections.current))*100>{$MONGODB.CONNS.PCT.USED.MAX.WARN} Warning
MongoDB node: Too many cursors opened by MongoDB for clients min(/MongoDB node by Zabbix agent 2/mongodb.cursor.open.total,5m)>{$MONGODB.CURSOR.OPEN.MAX.WARN} Warning
MongoDB node: Too many cursors are timing out min(/MongoDB node by Zabbix agent 2/mongodb.cursor.timed_out.rate,5m)>{$MONGODB.CURSOR.TIMEOUT.MAX.WARN} Warning

LLD rule Database discovery

Name Description Type Key and additional info
Database discovery

Collect database metrics.

Note, depending on the number of DBs this discovery operation may be expensive. Use filters with macros {$MONGODB.LLD.FILTER.DB.MATCHES}, {$MONGODB.LLD.FILTER.DB.NOT_MATCHES}.

 Zabbix agent mongodb.db.discovery["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]

Item prototypes for Database discovery

Name Description Type Key and additional info
MongoDB {#DBNAME}: Get db stats {#DBNAME}

Returns statistics reflecting the database system's state.

 Zabbix agent mongodb.db.stats["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}","{#DBNAME}"]
MongoDB {#DBNAME}: Objects, avg size

The average size of each document in bytes.

 Dependent item mongodb.db.size["{#DBNAME}"]

Preprocessing

  • JSON Path: $.avgObjSize
MongoDB {#DBNAME}: Size, data

Total size of the data held in this database including the padding factor.

 Dependent item mongodb.db.data_size["{#DBNAME}"]

Preprocessing

  • JSON Path: $.dataSize
MongoDB {#DBNAME}: Size, file

Total size of the data held in this database including the padding factor (only available with the mmapv1 storage engine).

 Dependent item mongodb.db.file_size["{#DBNAME}"]

Preprocessing

  • JSON Path: $.fileSize

    ⛔️Custom on fail: Discard value
MongoDB {#DBNAME}: Size, index

Total size of all indexes created on this database.

 Dependent item mongodb.db.index_size["{#DBNAME}"]

Preprocessing

  • JSON Path: $.indexSize
MongoDB {#DBNAME}: Size, storage

Total amount of space allocated to collections in this database for document storage.

 Dependent item mongodb.db.storage_size["{#DBNAME}"]

Preprocessing

  • JSON Path: $.storageSize
MongoDB {#DBNAME}: Collections

Contains a count of the number of collections in that database.

 Dependent item mongodb.db.collections["{#DBNAME}"]

Preprocessing

  • JSON Path: $.collections
MongoDB {#DBNAME}: Objects, count

Number of objects (documents) in the database across all collections.

 Dependent item mongodb.db.objects["{#DBNAME}"]

Preprocessing

  • JSON Path: $.objects
MongoDB {#DBNAME}: Extents

Contains a count of the number of extents in the database across all collections.

 Dependent item mongodb.db.extents["{#DBNAME}"]

Preprocessing

  • JSON Path: $.numExtents

    ⛔️Custom on fail: Discard value

LLD rule Collection discovery

Name Description Type Key and additional info
Collection discovery

Collect collections metrics.

Note, depending on the number of DBs and collections this discovery operation may be expensive. Use filters with macros {$MONGODB.LLD.FILTER.DB.MATCHES}, {$MONGODB.LLD.FILTER.DB.NOT_MATCHES}, {$MONGODB.LLD.FILTER.COLLECTION.MATCHES}, {$MONGODB.LLD.FILTER.COLLECTION.NOT_MATCHES}.

 Zabbix agent mongodb.collections.discovery["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}"]

Item prototypes for Collection discovery

Name Description Type Key and additional info
MongoDB {#DBNAME}.{#COLLECTION}: Get collection stats {#DBNAME}.{#COLLECTION}

Returns a variety of storage statistics for a given collection.

 Zabbix agent mongodb.collection.stats["{$MONGODB.CONNSTRING}","{$MONGODB.USER}","{$MONGODB.PASSWORD}","{#DBNAME}","{#COLLECTION}"]
MongoDB {#DBNAME}.{#COLLECTION}: Size

The total size in bytes of the data in the collection plus the size of every indexes on the mongodb.collection.

 Dependent item mongodb.collection.size["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.size
MongoDB {#DBNAME}.{#COLLECTION}: Objects, avg size

The size of the average object in the collection in bytes.

 Dependent item mongodb.collection.avg_obj_size["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.avgObjSize

    ⛔️Custom on fail: Discard value
MongoDB {#DBNAME}.{#COLLECTION}: Objects, count

Total number of objects in the collection.

 Dependent item mongodb.collection.count["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.count
MongoDB {#DBNAME}.{#COLLECTION}: Capped: max number

Maximum number of documents that may be present in a capped collection.

 Dependent item mongodb.collection.max_number["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.max

    ⛔️Custom on fail: Discard value
MongoDB {#DBNAME}.{#COLLECTION}: Capped: max size

Maximum size of a capped collection in bytes.

 Dependent item mongodb.collection.max_size["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.maxSize

    ⛔️Custom on fail: Discard value
MongoDB {#DBNAME}.{#COLLECTION}: Storage size

Total storage space allocated to this collection for document storage.

 Dependent item mongodb.collection.storage_size["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.storageSize
MongoDB {#DBNAME}.{#COLLECTION}: Indexes

Total number of indices on the collection.

 Dependent item mongodb.collection.nindexes["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.nindexes
MongoDB {#DBNAME}.{#COLLECTION}: Capped

Whether or not the collection is capped.

 Dependent item mongodb.collection.capped["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.capped

  • Boolean to decimal

  • Discard unchanged with heartbeat: 3h
MongoDB {#DBNAME}.{#COLLECTION}: Operations: total, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.total.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].total.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Read lock, rate

The number of operations per second.

 Dependent item mongodb.collection.read_lock.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].readLock.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Write lock, rate

The number of operations per second.

 Dependent item mongodb.collection.write_lock.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].writeLock.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: queries, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.queries.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].queries.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: getmore, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.getmore.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].getmore.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: insert, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.insert.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].insert.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: update, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.update.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].update.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: remove, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.remove.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].remove.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: commands, rate

The number of operations per second.

 Dependent item mongodb.collection.ops.commands.rate["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].commands.count

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: total, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.total.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].total.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Read lock, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.read_lock.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].readLock.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Write lock, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.write_lock.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].writeLock.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: queries, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.queries.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].queries.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: getmore, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.getmore.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].getmore.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: insert, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.insert.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].insert.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: update, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.update.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].update.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: remove, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.remove.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].remove.time

  • Change per second
MongoDB {#DBNAME}.{#COLLECTION}: Operations: commands, ms/s

Fraction of time (ms/s) the mongod has spent to operations.

 Dependent item mongodb.collection.ops.commands.ms["{#DBNAME}","{#COLLECTION}"]

Preprocessing

  • JSON Path: $.totals["{#DBNAME}.{#COLLECTION}"].commands.time

  • Change per second

LLD rule Replication discovery

Name Description Type Key and additional info
Replication discovery

Collect metrics by Zabbix agent if it exists.

 Dependent item mongodb.rs.discovery

Preprocessing

  • JavaScript: The text is too long. Please see the template.

  • Discard unchanged with heartbeat: 1h

Item prototypes for Replication discovery

Name Description Type Key and additional info
Node state

An integer between 0 and 10 that represents the replica state of the current member.

 Dependent item mongodb.rs.state[{#RS_NAME}]

Preprocessing

  • JSON Path: $.myState

  • Discard unchanged with heartbeat: 1h
Replication lag

Delay between a write operation on the primary and its copy to a secondary.

 Dependent item mongodb.rs.lag[{#RS_NAME}]

Preprocessing

  • JSON Path: $.members[?(@.self == "true")].lag.first()
Number of replicas

The number of replicated nodes in current ReplicaSet.

 Dependent item mongodb.rs.total_nodes[{#RS_NAME}]

Preprocessing

  • JSON Path: $.members[?(@.self == "true")].totalNodes.first()

  • Discard unchanged with heartbeat: 1h
Number of unhealthy replicas

The number of replicated nodes with member health value = 0.

 Dependent item mongodb.rs.unhealthy_count[{#RS_NAME}]

Preprocessing

  • JSON Path: $.members[?(@.self == "true")].unhealthyCount.first()

  • Discard unchanged with heartbeat: 1h
Unhealthy replicas

The replicated nodes in current ReplicaSet with member health value = 0.

 Dependent item mongodb.rs.unhealthy[{#RS_NAME}]

Preprocessing

  • JSON Path: $.members[?(@.self == "true")].unhealthyNodes.first()

  • JavaScript: The text is too long. Please see the template.

  • Discard unchanged with heartbeat: 1h
Apply batches, rate

Number of batches applied across all databases per second.

 Dependent item mongodb.rs.apply.batches.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.apply.batches.num

  • Change per second
Apply batches, ms/s

Fraction of time (ms/s) the mongod has spent applying operations from the oplog.

 Dependent item mongodb.rs.apply.batches.ms.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.apply.batches.totalMillis

  • Change per second
Apply ops, rate

Number of oplog operations applied per second.

 Dependent item mongodb.rs.apply.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.apply.ops

  • Change per second
Buffer

Number of operations in the oplog buffer.

 Dependent item mongodb.rs.buffer.count[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.buffer.count
Buffer, max size

Maximum size of the buffer.

 Dependent item mongodb.rs.buffer.max_size[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.buffer.maxSizeBytes
Buffer, size

Current size of the contents of the oplog buffer.

 Dependent item mongodb.rs.buffer.size[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.buffer.sizeBytes
Network bytes, rate

Amount of data read from the replication sync source per second.

 Dependent item mongodb.rs.network.bytes.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.network.bytes

  • Change per second
Network getmores, rate

Number of getmore operations per second.

 Dependent item mongodb.rs.network.getmores.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.network.getmores.num

  • Change per second
Network getmores, ms/s

Fraction of time (ms/s) required to collect data from getmore operations.

 Dependent item mongodb.rs.network.getmores.ms.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.network.getmores.totalMillis

  • Change per second
Network ops, rate

Number of operations read from the replication source per second.

 Dependent item mongodb.rs.network.ops.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.network.ops

  • Change per second
Network readers created, rate

Number of oplog query processes created per second.

 Dependent item mongodb.rs.network.readers.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.network.readersCreated

  • Change per second
MongoDB {#RS_NAME}: Oplog time diff

Oplog window: difference between the first and last operation in the oplog. Only present if there are entries in the oplog.

 Dependent item mongodb.rs.oplog.timediff[{#RS_NAME}]

Preprocessing

  • JSON Path: $.timediff
Preload docs, rate

Number of documents loaded per second during the pre-fetch stage of replication.

 Dependent item mongodb.rs.preload.docs.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.preload.docs.num

    ⛔️Custom on fail: Discard value

  • Change per second
Preload docs, ms/s

Fraction of time (ms/s) spent loading documents as part of the pre-fetch stage of replication.

 Dependent item mongodb.rs.preload.docs.ms.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.preload.docs.totalMillis

    ⛔️Custom on fail: Discard value

  • Change per second
Preload indexes, rate

Number of index entries loaded by members before updating documents as part of the pre-fetch stage of replication.

 Dependent item mongodb.rs.preload.indexes.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.preload.indexes.num

    ⛔️Custom on fail: Discard value

  • Change per second
Preload indexes, ms/s

Fraction of time (ms/s) spent loading documents as part of the pre-fetch stage of replication.

 Dependent item mongodb.rs.preload.indexes.ms.rate[{#RS_NAME}]

Preprocessing

  • JSON Path: $.metrics.repl.preload.indexes.totalMillis

    ⛔️Custom on fail: Discard value

  • Change per second

Trigger prototypes for Replication discovery

Name Description Expression Severity Dependencies and additional info
MongoDB node: Node in ReplicaSet changed the state

Node in ReplicaSet changed the state. Acknowledge to close the problem manually.

 last(/MongoDB node by Zabbix agent 2/mongodb.rs.state[{#RS_NAME}],#1)<>last(/MongoDB node by Zabbix agent 2/mongodb.rs.state[{#RS_NAME}],#2) Warning Manual close: Yes
MongoDB node: Replication lag with primary is too high min(/MongoDB node by Zabbix agent 2/mongodb.rs.lag[{#RS_NAME}],5m)>{$MONGODB.REPL.LAG.MAX.WARN} Warning
MongoDB node: There are unhealthy replicas in ReplicaSet last(/MongoDB node by Zabbix agent 2/mongodb.rs.unhealthy_count[{#RS_NAME}])>0 and length(last(/MongoDB node by Zabbix agent 2/mongodb.rs.unhealthy[{#RS_NAME}]))>0 Average

LLD rule WiredTiger metrics

Name Description Type Key and additional info
WiredTiger metrics

Collect metrics of WiredTiger Storage Engine if it exists.

 Dependent item mongodb.wired_tiger.discovery

Preprocessing

  • JavaScript: The text is too long. Please see the template.

  • Discard unchanged with heartbeat: 6h

Item prototypes for WiredTiger metrics

Name Description Type Key and additional info
WiredTiger cache: bytes

Size of the data currently in cache.

 Dependent item mongodb.wired_tiger.cache.bytes_in_cache[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['bytes currently in the cache']
WiredTiger cache: in-memory page splits

In-memory page splits.

 Dependent item mongodb.wired_tiger.cache.splits[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['in-memory page splits']
WiredTiger cache: bytes, max

Maximum cache size.

 Dependent item mongodb.wired_tiger.cache.maximum_bytes_configured[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['maximum bytes configured']
WiredTiger cache: max page size at eviction

Maximum page size at eviction.

 Dependent item mongodb.wired_tiger.cache.max_page_size_eviction[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['maximum page size at eviction']
WiredTiger cache: modified pages evicted

Number of pages, that have been modified, evicted from the cache.

 Dependent item mongodb.wired_tiger.cache.modified_pages_evicted[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['modified pages evicted']
WiredTiger cache: pages read into cache

Number of pages read into the cache.

 Dependent item mongodb.wired_tiger.cache.pages_read[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['pages read into cache']
WiredTiger cache: pages written from cache

Number of pages written from the cache.

 Dependent item mongodb.wired_tiger.cache.pages_written[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['pages written from cache']
WiredTiger cache: pages held in cache

Number of pages currently held in the cache.

 Dependent item mongodb.wired_tiger.cache.pages_in_cache[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache['pages currently held in the cache']
WiredTiger cache: pages evicted by application threads, rate

Number of page evicted by application threads per second.

 Dependent item mongodb.wired_tiger.cache.pages_evicted_threads.rate[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache.['pages evicted by application threads']
WiredTiger cache: tracked dirty bytes in the cache

Size of the dirty data in the cache.

 Dependent item mongodb.wired_tiger.cache.tracked_dirty_bytes[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache.['tracked dirty bytes in the cache']
WiredTiger cache: unmodified pages evicted

Number of pages, that were not modified, evicted from the cache.

 Dependent item mongodb.wired_tiger.cache.unmodified_pages_evicted[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.cache.['unmodified pages evicted']
WiredTiger concurrent transactions: read, available

Number of available read tickets (concurrent transactions) remaining.

 Dependent item mongodb.wired_tiger.concurrent_transactions.read.available[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.concurrentTransactions.read.available
WiredTiger concurrent transactions: read, out

Number of read tickets (concurrent transactions) in use.

 Dependent item mongodb.wired_tiger.concurrent_transactions.read.out[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.concurrentTransactions.read.out
WiredTiger concurrent transactions: read, total tickets

Total number of read tickets (concurrent transactions) available.

 Dependent item mongodb.wired_tiger.concurrent_transactions.read.totalTickets[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.concurrentTransactions.read.totalTickets
WiredTiger concurrent transactions: write, available

Number of available write tickets (concurrent transactions) remaining.

 Dependent item mongodb.wired_tiger.concurrent_transactions.write.available[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.concurrentTransactions.write.available
WiredTiger concurrent transactions: write, out

Number of write tickets (concurrent transactions) in use.

 Dependent item mongodb.wired_tiger.concurrent_transactions.write.out[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.concurrentTransactions.write.out
WiredTiger concurrent transactions: write, total tickets

Total number of write tickets (concurrent transactions) available.

 Dependent item mongodb.wired_tiger.concurrent_transactions.write.totalTickets[{#SINGLETON}]

Preprocessing

  • JSON Path: $.wiredTiger.concurrentTransactions.write.totalTickets

Trigger prototypes for WiredTiger metrics

Name Description Expression Severity Dependencies and additional info
MongoDB node: Available WiredTiger read tickets is low

Too few available read tickets.
When the number of available read tickets remaining reaches zero, new read requests will be queued until a new read ticket is available.

 max(/MongoDB node by Zabbix agent 2/mongodb.wired_tiger.concurrent_transactions.read.available[{#SINGLETON}],5m)<{$MONGODB.WIRED_TIGER.TICKETS.AVAILABLE.MIN.WARN} Warning
MongoDB node: Available WiredTiger write tickets is low

Too few available write tickets.
When the number of available write tickets remaining reaches zero, new write requests will be queued until a new write ticket is available.

 max(/MongoDB node by Zabbix agent 2/mongodb.wired_tiger.concurrent_transactions.write.available[{#SINGLETON}],5m)<{$MONGODB.WIRED_TIGER.TICKETS.AVAILABLE.MIN.WARN} Warning

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