Couchbase monitoring & observability

Metric name	Metric key	Description	Unit
XDCR replicated docs	couchbase.xdcr_docs_processed_total	Number of documents processed for a Replication	Count
XDCR docs received	couchbase.xdcr_docs_received_from_dcp_total	Number of Document Mutations received from the Data Service	Count
XDCR docs written	couchbase.xdcr_docs_written_total	Number of docs Document Mutations written/sent to the Target	Count
XDCR write operations	couchbase.xdcr_set_docs_written_total	Number of Set operations successfully written to the Target	Count

Metric name	Metric key	Description	Unit
Current MCBP/DCP Connections	couchbase.kv_curr_connections	Current number of MCBP/DCP connections	Count
Waiting for commit (bucket)	couchbase.kv_disk_seconds_bucket	Waiting for a commit after a batch of updates	Second
Waiting for commit (count)	couchbase.kv_disk_seconds_count.gauge	Waiting for a commit after a batch of updates	Second
Waiting for commit (sum)	couchbase.kv_disk_seconds_sum	Waiting for a commit after a batch of updates	Second
Disk used by Bucket	couchbase.kv_ep_db_data_size_bytes	Total size of valid data in db files	Byte
Disk drain rate	couchbase.kv_ep_diskqueue_drain	Total drained items on disk queue	Count
Enqueued items on disk queue	couchbase.kv_ep_diskqueue_fill	Total enqueued items on disk queue	Count
Total memory used in disk queue	couchbase.kv_ep_diskqueue_memory_bytes	Total memory used in disk queue	Byte
Disk used percent by node	couchbase.kv_ep_magma_total_disk_usage_bytes	Disk used percent by node	Byte
Items queued for storage	couchbase.kv_ep_queue_size	Number of items queued for storage	Count
Temporary out of memory errors by bucket	couchbase.kv_ep_tmp_oom_errors	Number of times temporary OOMs happened while processing operations	Count
Total engine memory usage	couchbase.kv_mem_used_bytes	Engine's total memory usage	Byte
Get ops per second	couchbase.kv_vb_ops_get	Get Ops Per Second	PerSecond
Set ops per second	couchbase.kv_vb_ops_set	Set Ops Pet Second	PerSecond
Active item resident ratio	couchbase.kv_vb_perc_mem_resident_ratio	Active item resident ratio	Percent
VB queue drain	couchbase.kv_vb_queue_drain	VB queue drain	Unspecified
VB queue fill	couchbase.kv_vb_queue_fill	VB queue fill	Unspecified
VB queue pending	couchbase.kv_vb_queue_pending_bytes	VB queue pending	Unspecified
VB queue size	couchbase.kv_vb_queue_size	VB queue size	Unspecified

Metric name	Metric key	Description	Unit
Documents indexed per second	couchbase.index_avg_drain_rate	Average number of documents indexed per second, for this index	PerSecond
Average size of index items	couchbase.index_avg_item_size	Average size of the indexed items	Byte
Uncompressed index data size	couchbase.index_data_size	The approximate size of the valid uncompressed index data	Byte
Index total disk space	couchbase.index_disk_size	Total disk space taken up by this index after compression. This includes index data files, checkpoints etc.	Byte
Records in memory ratio	couchbase.index_resident_percent	Ratio of records in memory to total records, for this index	Percent

Metric name	Metric key	Description	Unit
CPU Utilization (Deprecated in CB v7.6.0)	couchbase.sysproc_cpu_utilization	CPU utilization rate	Unspecified
Resident memory used	couchbase.sysproc_mem_resident	Amount of resident memory used	Byte
Memory used	couchbase.sysproc_mem_size	Amount of memory used	Byte
CPU Utilization	couchbase.sys_cpu_utilization_rate	CPU utilization rate in the control group	Percent

Metric name	Metric key	Description	Unit
Total active requests	couchbase.n1ql_active_requests	Total number of active requests.	Count
Total N1QL requests with at_plus index consistency	couchbase.n1ql_at_plus.count	Total number of N1QL requests with at_plus index consistency.	Count
Total audit records sent	couchbase.n1ql_audit_actions.count	The total number of audit records sent to the server. Some requests cause more than one audit record to be emitted. Records in the output queue that have not yet been sent to the server are not counted.	Count
Total failed audit records sent	couchbase.n1ql_audit_actions_failed.count	The total number of audit records sent to the server that failed.	Count
Potentially auditable requests with no audit action	couchbase.n1ql_audit_requests_filtered.count	The number of potentially auditable requests that cause no audit action to be taken.	Count
Potentially auditable requests sent to query engine	couchbase.n1ql_audit_requests_total.count	The total number of potentially auditable requests sent to the query engine.	Count
Cancelled requests	couchbase.n1ql_cancelled.count	Total number of cancelled requests.	Count
Delete operations	couchbase.n1ql_deletes.count	Total number of DELETE operations.	Count
N1QL error count	couchbase.n1ql_errors.count	The total number of N1QL errors returned so far.	Count
Secondary index scans	couchbase.n1ql_index_scans.count	Total number of secondary index scans.	Count
Insert operations	couchbase.n1ql_inserts.count	Total number of INSERT operations.	Count
Invalid requests	couchbase.n1ql_invalid_requests.count	Total number of requests for unsupported endpoints.	Count
Document mutations	couchbase.n1ql_mutations.count	Total number of document mutations.	Count
Prepared statements executed	couchbase.n1ql_prepared.count	Total number of prepared statements executed.	Count
Primary index scans	couchbase.n1ql_primary_scans.count	Total number of primary index scans.	Count
Query process time	couchbase.n1ql_request_time.count	Total end-to-end time to process all queries.	NanoSecond
N1QL requests	couchbase.n1ql_requests.count	Total number of N1QL requests.	Count
Queries longer than 1000ms	couchbase.n1ql_requests_1000ms.count	Number of queries that take longer than 1000ms.	Count
Queries longer than 250ms	couchbase.n1ql_requests_250ms.count	Number of queries that take longer than 250ms.	Count
Queries longer than 5000ms	couchbase.n1ql_requests_5000ms.count	Number of queries that take longer than 5000ms.	Count
Queries longer than 500ms	couchbase.n1ql_requests_500ms.count	Number of queries that take longer than 500ms.	Count
Results (document) returned count	couchbase.n1ql_result_count	Total number of results (documents) returned by the query engine.	Count
Result size	couchbase.n1ql_result_size.count	Total size of data returned by the query engine.	Count
N1QL requests with request_plus consistency	couchbase.n1ql_scan_plus.count	Total number of N1QL requests with request_plus index consistency.	Count
Select requests	couchbase.n1ql_selects.count	Total number of SELECT requests.	Count
Time to execute queries	couchbase.n1ql_service_time.count	Time to execute all queries.	NanoSecond
Elapsed transaction time	couchbase.n1ql_transaction_time.count	Total elapsed time of transactions so far.	NanoSecond
Transaction count	couchbase.n1ql_transactions.count	Total number of transactions.	Count
N1QL requests with not_bounded consistency	couchbase.n1ql_unbounded.count	Total number of N1QL requests with not_bounded index consistency.	Count
Update requests	couchbase.n1ql_updates.count	Total number of UPDATE requests.	Count
N1QL warnings	couchbase.n1ql_warnings.count	The total number of N1QL warnings returned so far.	Count