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MongoDB Monitoring Integration

Sematext offers a simple, easy to install, MongoDB monitoring agent with minimal CPU and memory overhead.

Install MongoDB Monitoring Agent¶

Setting up the monitoring agent takes less than 5 minutes:

Create a MongoDB App in the Integrations / Overview (or Sematext Cloud Europe). This will let you install the agent and control access to your monitoring and logs data. The short What is an App in Sematext Cloud video has more details.
Name your MongoDB monitoring App and, if you want to collect MongoDB logs as well, create a Logs App along the way.
Install the Sematext Agent according to the setup instructions displayed in the UI.

MongoDB Metrics¶

Metric Name	Key	Agg	Type	Description
flushes time	mongo.flushes.time	Sum	Long	Time spend in flushes during the collection interval
flushes count	mongo.flushes	Sum	Long	Flushes in collection interval
created	mongo.network.connections.total	Sum	Long	Created provides a count of all incoming connections created to the server. This number includes connections that have since closed.
current	mongo.network.connections	Avg	Double	The value of current corresponds to the number of connections to the database server from clients.
num requests	mongo.network.requests	Sum	Long	Number of network requests
received	mongo.network.transfer.rx.rate	Sum	Long	The value of 'received' reflects the amount of network traffic, in bytes, received by this database.
transmitted	mongo.network.transfer.tx.rate	Sum	Long	The value of 'transmitted' reflects the amount of network traffic, in bytes, sent by this database.
acquire count	mongo.locks	Sum	Long	Lock count
acquire count waits	mongo.locks.wait	Sum	Long	Number of times the acquireCount lock acquisitions encountered waits because the locks were held in a conflicting mode.
wait time	mongo.locks.acquiring.time.microsec	Sum	Long	Cumulative wait time for the lock acquisitions.
deadlock count	mongo.locks.deadlock	Sum	Long	Number of times the lock acquisitions encountered deadlocks.
early commits	mongo.journal.commits.early	Sum	Long	Number of times MongoDB requested a commit before the scheduled journal group commit interval. Use this value to ensure that your journal group commit intervalis not too long for your deployment.
commits write-lock time	mongo.journal.commits.locked.time	Sum	Long	Amount of time spent for commits that occurred while a write lock was held. Commits in a write lock indicate a MongoDB node under a heavy write load and call for further diagnosis.
written files data	mongo.journal.data.written	Sum	Long	Amount of data written from journal to the data files during the last journal group commit interval.
written journal data	mongo.journal.data	Sum	Long	Amount of data written to journal during the last journal group commit interval.
commits time	mongo.journal.commits.time	Sum	Long	Amount of time spent for commits.
commits	mongo.journal.commits	Sum	Long	Number of transactions written to the journal during the last journal group commit interval.
collections count	mongo.database.collections	Avg	Long	Count of collections/tables
data size	mongo.database.data.size	Avg	Long	The total size in bytes of the data held in this database including the padding factor.
index size	mongo.database.index.size	Avg	Long	The total size in bytes of all indexes created on this database.
namespace size	mongo.database.namespace.size	Avg	Long	The total size of the namespace files (i.e. that end with .ns) for this database.
storage size	mongo.database.storage.size	Avg	Long	The total amount of space in bytes allocated to collections in this database for document storage.
objects count	mongo.database.objects	Avg	Long	Count of objects in db
file size	mongo.database.file.size	Avg	Long	The total size in bytes of the data files that hold the database. This value includes preallocated space and the padding factor.
mapped mem	mongo.memory.mapped	Avg	Long	The value of mapped provides the amount of mapped memory, in megabytes (MB), by the database. Because MongoDB uses memory-mapped files, this value is likely to be to be roughly equivalent to the total size of your database or databases.
resident mem	mongo.memory.resident	Avg	Long	The value of resident is roughly equivalent to the amount of RAM, in megabytes (MB), currently used by the database process. In normal use this value tends to grow.
virtual mem	mongo.memory.virtual	Avg	Long	Virtual displays the quantity, in megabytes (MB), of virtual memory used by the mongod process. With journaling enabled, the value of virtual is at least twice the value of mapped. If virtual value is significantly larger than mapped (e.g. 3 or more times), this may indicate a memory leak.
mapped mem with journal	mongo.memory.mapped.withjournal	Avg	Long	mappedWithJournal provides the amount of mapped memory, in megabytes (MB), including the memory used for journaling. This value will always be twice the value of mapped. This field is only included if journaling is enabled.
inserted	mongo.documents.inserted	Sum	Long	Number of inserted documents.
returned	mongo.documents.returned	Sum	Long	Total number of documents returned by queries.
updated	mongo.documents.updated	Sum	Long	Number of updated documents.
deleted	mongo.documents.deleted	Sum	Long	Number of deleted documents.
query	mongo.ops.query	Sum	Long	Query operations
commands	mongo.ops.command	Sum	Long	Commands
query	mongo.replica.ops.query	Sum	Long	Query operations
insert	mongo.ops.insert	Sum	Long	Insert operations
insert	mongo.replica.ops.insert	Sum	Long	Insert operations
update	mongo.replica.ops.update	Sum	Long	Update operations
failed	mongo.commands.failed	Sum	Long	Failed commands / operations (all DB commands/functions)
delete	mongo.replica.ops.delete	Sum	Long	Delete operations
commands	mongo.replica.ops.command	Sum	Long	Commands
update	mongo.ops.update	Sum	Long	Update operations
delete	mongo.ops.delete	Sum	Long	Delete operations
getmore	mongo.ops.getmore	Sum	Long	Getmore operations
getmore	mongo.replica.ops.getmore	Sum	Long	Getmore operations
mongo.active_reads	mongo.active_reads	Avg	long
mongo.active_writes	mongo.active_writes	Avg	long
mongo.aggregate_command_failed	mongo.aggregate_command_failed	Avg	long
mongo.aggregate_command_total	mongo.aggregate_command_total	Avg	long
mongo.assert_msg	mongo.assert_msg	Avg	long
mongo.assert_regular	mongo.assert_regular	Avg	long
mongo.assert_rollovers	mongo.assert_rollovers	Avg	long
mongo.assert_user	mongo.assert_user	Avg	long
mongo.assert_warning	mongo.assert_warning	Avg	long
mongo.available_reads	mongo.available_reads	Avg	long
mongo.available_writes	mongo.available_writes	Avg	long
mongo.commands.failed	mongo.commands.failed	Avg	long
mongo.commands.total	mongo.commands.total	Avg	long
mongo.commands_per_sec	mongo.commands_per_sec	Avg	long
mongo.connections_available	mongo.connections_available	Avg	long
mongo.cursor_no_timeout	mongo.cursor_no_timeout	Avg	long
mongo.cursor_no_timeout_count	mongo.cursor_no_timeout_count	Avg	long
mongo.cursor_pinned	mongo.cursor_pinned	Avg	long
mongo.cursor_pinned_count	mongo.cursor_pinned_count	Avg	long
mongo.cursor_timed_out	mongo.cursor_timed_out	Avg	long
mongo.cursor_timed_out_count	mongo.cursor_timed_out_count	Avg	long
mongo.cursor_total	mongo.cursor_total	Avg	long
mongo.cursor_total_count	mongo.cursor_total_count	Avg	long
mongo.delete_command_failed	mongo.delete_command_failed	Avg	long
mongo.delete_command_total	mongo.delete_command_total	Avg	long
mongo.deletes	mongo.deletes	Avg	long
mongo.deletes_per_sec	mongo.deletes_per_sec	Avg	long
mongo.distinct_command_failed	mongo.distinct_command_failed	Avg	long
mongo.distinct_command_total	mongo.distinct_command_total	Avg	long
mongo.find_and_modify_command_failed	mongo.find_and_modify_command_failed	Avg	long
mongo.find_and_modify_command_total	mongo.find_and_modify_command_total	Avg	long
mongo.find_command_failed	mongo.find_command_failed	Avg	long
mongo.find_command_total	mongo.find_command_total	Avg	long
mongo.flushes_per_sec	mongo.flushes_per_sec	Avg	long
mongo.get_more_command_failed	mongo.get_more_command_failed	Avg	long
mongo.get_more_command_total	mongo.get_more_command_total	Avg	long
mongo.getmores_per_sec	mongo.getmores_per_sec	Avg	long
mongo.insert_command_failed	mongo.insert_command_failed	Avg	long
mongo.insert_command_total	mongo.insert_command_total	Avg	long
mongo.inserts_per_sec	mongo.inserts_per_sec	Avg	long
mongo.jumbo_chunks	mongo.jumbo_chunks	Avg	long
mongo.latency_commands	mongo.latency_commands	Avg	long
mongo.latency_commands_count	mongo.latency_commands_count	Avg	long
mongo.latency_reads	mongo.latency_reads	Avg	long
mongo.latency_reads_count	mongo.latency_reads_count	Avg	long
mongo.latency_writes	mongo.latency_writes	Avg	long
mongo.latency_writes_count	mongo.latency_writes_count	Avg	long
mongo.net_in_bytes_count	mongo.net_in_bytes_count	Avg	long
mongo.net_out_bytes_count	mongo.net_out_bytes_count	Avg	long
mongo.open_connections	mongo.open_connections	Avg	long
mongo.operation_scan_and_order	mongo.operation_scan_and_order	Avg	long
mongo.operation_write_conflicts	mongo.operation_write_conflicts	Avg	long
mongo.page_faults	mongo.page_faults	Avg	long
mongo.percent_cache_dirty	mongo.percent_cache_dirty	Avg	double
mongo.percent_cache_used	mongo.percent_cache_used	Avg	double
mongo.queries_per_sec	mongo.queries_per_sec	Avg	long
mongo.queued_reads	mongo.queued_reads	Avg	long
mongo.queued_writes	mongo.queued_writes	Avg	long
mongo.repl_apply_batches_num	mongo.repl_apply_batches_num	Avg	long
mongo.repl_apply_batches_total_millis	mongo.repl_apply_batches_total_millis	Avg	long
mongo.repl_apply_ops	mongo.repl_apply_ops	Avg	long
mongo.repl_buffer_count	mongo.repl_buffer_count	Avg	long
mongo.repl_buffer_size_bytes	mongo.repl_buffer_size_bytes	Avg	long
mongo.repl_commands_per_sec	mongo.repl_commands_per_sec	Avg	long
mongo.repl_deletes_per_sec	mongo.repl_deletes_per_sec	Avg	long
mongo.repl_executor_pool_in_progress_count	mongo.repl_executor_pool_in_progress_count	Avg	long
mongo.repl_executor_queues_network_in_progress	mongo.repl_executor_queues_network_in_progress	Avg	long
mongo.repl_executor_queues_sleepers	mongo.repl_executor_queues_sleepers	Avg	long
mongo.repl_executor_unsignaled_events	mongo.repl_executor_unsignaled_events	Avg	long
mongo.repl_getmores_per_sec	mongo.repl_getmores_per_sec	Avg	long
mongo.repl_inserts_per_sec	mongo.repl_inserts_per_sec	Avg	long
mongo.repl_lag	mongo.repl_lag	Avg	long
mongo.repl_network_bytes	mongo.repl_network_bytes	Avg	long
mongo.repl_network_getmores_num	mongo.repl_network_getmores_num	Avg	long
mongo.repl_network_getmores_total_millis	mongo.repl_network_getmores_total_millis	Avg	long
mongo.repl_network_ops	mongo.repl_network_ops	Avg	long
mongo.repl_oplog_window_sec	mongo.repl_oplog_window_sec	Avg	long
mongo.repl_queries_per_sec	mongo.repl_queries_per_sec	Avg	long
mongo.repl_state	mongo.repl_state	Avg	long
mongo.repl_updates_per_sec	mongo.repl_updates_per_sec	Avg	long
mongo.storage_freelist_search_bucket_exhausted	mongo.storage_freelist_search_bucket_exhausted	Avg	long
mongo.storage_freelist_search_requests	mongo.storage_freelist_search_requests	Avg	long
mongo.storage_freelist_search_scanned	mongo.storage_freelist_search_scanned	Avg	long
mongo.tcmalloc_central_cache_free_bytes	mongo.tcmalloc_central_cache_free_bytes	Avg	long
mongo.tcmalloc_current_allocated_bytes	mongo.tcmalloc_current_allocated_bytes	Avg	long
mongo.tcmalloc_current_total_thread_cache_bytes	mongo.tcmalloc_current_total_thread_cache_bytes	Avg	long
mongo.tcmalloc_heap_size	mongo.tcmalloc_heap_size	Avg	long
mongo.tcmalloc_max_total_thread_cache_bytes	mongo.tcmalloc_max_total_thread_cache_bytes	Avg	long
mongo.tcmalloc_pageheap_commit_count	mongo.tcmalloc_pageheap_commit_count	Avg	long
mongo.tcmalloc_pageheap_committed_bytes	mongo.tcmalloc_pageheap_committed_bytes	Avg	long
mongo.tcmalloc_pageheap_decommit_count	mongo.tcmalloc_pageheap_decommit_count	Avg	long
mongo.tcmalloc_pageheap_free_bytes	mongo.tcmalloc_pageheap_free_bytes	Avg	long
mongo.tcmalloc_pageheap_reserve_count	mongo.tcmalloc_pageheap_reserve_count	Avg	long
mongo.tcmalloc_pageheap_scavenge_count	mongo.tcmalloc_pageheap_scavenge_count	Avg	long
mongo.tcmalloc_pageheap_total_commit_bytes	mongo.tcmalloc_pageheap_total_commit_bytes	Avg	long
mongo.tcmalloc_pageheap_total_decommit_bytes	mongo.tcmalloc_pageheap_total_decommit_bytes	Avg	long
mongo.tcmalloc_pageheap_total_reserve_bytes	mongo.tcmalloc_pageheap_total_reserve_bytes	Avg	long
mongo.tcmalloc_pageheap_unmapped_bytes	mongo.tcmalloc_pageheap_unmapped_bytes	Avg	long
mongo.tcmalloc_spinlock_total_delay_ns	mongo.tcmalloc_spinlock_total_delay_ns	Avg	long
mongo.tcmalloc_thread_cache_free_bytes	mongo.tcmalloc_thread_cache_free_bytes	Avg	long
mongo.tcmalloc_total_free_bytes	mongo.tcmalloc_total_free_bytes	Avg	long
mongo.tcmalloc_transfer_cache_free_bytes	mongo.tcmalloc_transfer_cache_free_bytes	Avg	long
mongo.total_available	mongo.total_available	Avg	long
mongo.total_created	mongo.total_created	Avg	long
mongo.total_docs_scanned	mongo.total_docs_scanned	Avg	long
mongo.total_in_use	mongo.total_in_use	Avg	long
mongo.total_keys_scanned	mongo.total_keys_scanned	Avg	long
mongo.total_refreshing	mongo.total_refreshing	Avg	long
mongo.total_tickets_reads	mongo.total_tickets_reads	Avg	long
mongo.total_tickets_writes	mongo.total_tickets_writes	Avg	long
mongo.ttl_deletes	mongo.ttl_deletes	Avg	long
mongo.ttl_deletes_per_sec	mongo.ttl_deletes_per_sec	Avg	long
mongo.ttl_passes	mongo.ttl_passes	Avg	long
mongo.ttl_passes_per_sec	mongo.ttl_passes_per_sec	Avg	long
mongo.update_command_failed	mongo.update_command_failed	Avg	long
mongo.update_command_total	mongo.update_command_total	Avg	long
mongo.updates_per_sec	mongo.updates_per_sec	Avg	long
mongo.uptime_ns	mongo.uptime_ns	Avg	long
mongo.wtcache_app_threads_page_read_count	mongo.wtcache_app_threads_page_read_count	Avg	long
mongo.wtcache_app_threads_page_read_time	mongo.wtcache_app_threads_page_read_time	Avg	long
mongo.wtcache_app_threads_page_write_count	mongo.wtcache_app_threads_page_write_count	Avg	long
mongo.wtcache_bytes_read_into	mongo.wtcache_bytes_read_into	Avg	long
mongo.wtcache_bytes_written_from	mongo.wtcache_bytes_written_from	Avg	long
mongo.wtcache_current_bytes	mongo.wtcache_current_bytes	Avg	long
mongo.wtcache_internal_pages_evicted	mongo.wtcache_internal_pages_evicted	Avg	long
mongo.wtcache_max_bytes_configured	mongo.wtcache_max_bytes_configured	Avg	long
mongo.wtcache_modified_pages_evicted	mongo.wtcache_modified_pages_evicted	Avg	long
mongo.wtcache_pages_evicted_by_app_thread	mongo.wtcache_pages_evicted_by_app_thread	Avg	long
mongo.wtcache_pages_queued_for_eviction	mongo.wtcache_pages_queued_for_eviction	Avg	long
mongo.wtcache_pages_read_into	mongo.wtcache_pages_read_into	Avg	long
mongo.wtcache_pages_requested_from	mongo.wtcache_pages_requested_from	Avg	long
mongo.wtcache_pages_written_from	mongo.wtcache_pages_written_from	Avg	long
mongo.wtcache_server_evicting_pages	mongo.wtcache_server_evicting_pages	Avg	long
mongo.wtcache_tracked_dirty_bytes	mongo.wtcache_tracked_dirty_bytes	Avg	long
mongo.wtcache_unmodified_pages_evicted	mongo.wtcache_unmodified_pages_evicted	Avg	long
mongo.wtcache_worker_thread_evictingpages	mongo.wtcache_worker_thread_evictingpages	Avg	long
mongo.mongodb_col_stats.avg_obj_size	mongo.mongodb_col_stats.avg_obj_size	Avg	double
mongo.mongodb_col_stats.count	mongo.mongodb_col_stats.count	Avg	long
mongo.mongodb_col_stats.ok	mongo.mongodb_col_stats.ok	Avg	long
mongo.mongodb_col_stats.size	mongo.mongodb_col_stats.size	Avg	long
mongo.mongodb_col_stats.storage_size	mongo.mongodb_col_stats.storage_size	Avg	long
mongo.mongodb_col_stats.total_index_size	mongo.mongodb_col_stats.total_index_size	Avg	long
mongo.mongodb_col_stats.avg_obj_size	mongo.mongodb_col_stats.avg_obj_size	Avg	double
mongo.mongodb_col_stats.count	mongo.mongodb_col_stats.count	Avg	long
mongo.mongodb_col_stats.ok	mongo.mongodb_col_stats.ok	Avg	long
mongo.mongodb_col_stats.size	mongo.mongodb_col_stats.size	Avg	long
mongo.mongodb_col_stats.storage_size	mongo.mongodb_col_stats.storage_size	Avg	long
mongo.mongodb_col_stats.total_index_size	mongo.mongodb_col_stats.total_index_size	Avg	long
mongo.mongodb_shard_stats.in_use	mongo.mongodb_shard_stats.in_use	Avg	long
mongo.mongodb_shard_stats.available	mongo.mongodb_shard_stats.available	Avg	long
mongo.mongodb_shard_stats.available	mongo.mongodb_shard_stats.available	Avg	long
mongo.mongodb_shard_stats.refreshing	mongo.mongodb_shard_stats.refreshing	Avg	long

Troubleshooting¶

If you are having issues with Sematext Monitoring, i.e. not seeing MongoDB metrics, see How do I create the diagnostics package.

For more troubleshooting information please look at Troubleshooting section.