Data Service Metrics

A list of the metrics provided by the Data Service.

The following Data Service metrics can be queried by means of the REST APIs described in Statistics.

See Data Service Metrics Cross Reference if you are looking for a metric name you know from an alternative supported or legacy tool.

Histograms

Note that each histogram metric will generate three time series, with the following suffixes:

_count
_sum
_bucket

Please refer to Prometheus Histograms and Summaries for more information.

Tip	The x.y.z badge shows the Couchbase Server version the metric was added in. The type / unit badge shows shows the Prometheus type and unit (if present).

kv_audit_dropped_events: 7.0.0 counter The number of audit events dropped due to errors while trying to insert them to the audit trail
kv_audit_enabled: 7.0.0 gauge Boolean value to indicate if audit is enabled or not
kv_auth_cmds: 7.0.0 gauge The number of authentication commands
kv_auth_errors: 7.0.0 gauge The number of failed authentication requests
kv_auth_external_authentication_duration_seconds: 8.0.0 histogram / seconds Timing histogram for external authentication execution times
kv_auth_external_authorization_duration_seconds: 8.0.0 histogram / seconds Timing histogram for external authorization execution times
kv_auth_external_received: 8.0.0 gauge The number of received external authentication responses
kv_auth_external_sent: 8.0.0 gauge The total number of requests sent to the external authentication provider
kv_bg_batch_size: 7.0.0 histogram Batch size for background fetches
kv_bg_load_seconds: 7.0.0 histogram / seconds Background fetches waiting for disk
kv_bg_wait_seconds: 7.0.0 histogram / seconds Background fetches waiting in the dispatcher queue
kv_clients: 7.6.0 gauge The number of references to the bucket
kv_cmd_duration_seconds: 7.0.0 histogram / seconds Per-opcode histogram of time taken to execute operations
kv_cmd_lookup: 7.0.0 counter The number of lookup operations. This includes operations such as Get, Gat, Getk, Getq, GetLocked, GetRandomKey, GetReplica, SubdocMultiLookup, SubdocGet and SubdocExists
kv_cmd_lookup_10s_count: 7.0.0 gauge The number of lookup operations performed within the last 10 seconds. This aggregates operations like Get, Gat, Getk, Getq, and various Sub-Document lookups
kv_cmd_lookup_10s_duration_seconds: 7.0.0 gauge / seconds The total duration of lookup operations performed over the last 10 seconds. This aggregates the time for operations like Get, Gat, Getk, Getq, and various Sub-Document lookups
kv_cmd_mutation: 7.0.0 counter The number of mutation operations. This includes operations such as Add, Append, Decrement, Delete, Gat, Increment, Prepend, Replace, Set, Touch, and various Sub-Document mutations (e.g., SubdocArrayAddUnique, SubdocCounter, SubdocDelete, etc.)
kv_cmd_mutation_10s_count: 7.0.0 gauge The number of mutation operations performed within the last 10 seconds. This includes operations like Add, Append, Delete, Replace, and various Sub-Document mutations
kv_cmd_mutation_10s_duration_seconds: 7.0.0 gauge / seconds The total duration of mutation operations performed over the last 10 seconds. This includes time spent on operations like Add, Append, Delete, Replace, and various Sub-Document mutations
kv_collection_data_size_bytes: 7.0.0 gauge / bytes Per-collection data size on disk for active vbuckets only
kv_collection_history: 7.2.0 gauge Whether history (CDC) is enabled for each collection
kv_collection_item_count: 7.0.0 gauge Per-collection item count for active vbuckets only
kv_collection_maxTTL_seconds: 7.0.0 gauge / seconds Per-collection maxTTL (maximum expiry) if configured
kv_collection_mem_used_bytes: 7.0.0 gauge / bytes Per-collection memory usage for active vbuckets only
kv_collection_ops: 7.0.0 counter Per-collection counters of operations that perform store/get(read)/delete type operations against active vbuckets
kv_conflicts_resolved: 7.2.0 counter Counter of all SetWithMeta/DelWithMeta conflict resolution results. The result may be that the incoming operation was: accepted as it is 'ahead', rejected as it is 'behind', or rejected as it appears identical (by metadata, not comparing document bodies)
kv_conn_timeslice_yields: 7.6.0 counter The total number all clients in this bucket yield due to using their entire timeslice
kv_conn_yields: 7.0.0 counter The total number all clients in this bucket yield due to consuming the number of ops allowed for the current timeslice
kv_connection_structures: 7.0.0 gauge Current number of allocated connection structures
kv_curr_connections: 7.0.0 gauge The current number of connections. This includes user, system and daemon connections
kv_curr_connections_closing: 8.0.0 gauge The current number of connections currently closing down
kv_curr_items: 7.0.0 gauge Count of alive (non-deleted) items in active vbuckets, including non-resident items
kv_curr_items_tot: 7.0.0 gauge Total number of items
kv_curr_temp_items: 7.0.0 gauge Number of temporary items in memory
kv_current_external_client_connections: 7.6.5 gauge The current number of authenticated connections using the labelled SDK
kv_daemon_connections: 7.0.0 gauge The number of server sockets currently in use
kv_daemon_memory_allocated_bytes: 7.1.0 gauge / bytes Total amount of memory allocated (outside the context of a bucket)
kv_daemon_memory_resident_bytes: 7.1.0 gauge / bytes Total amount of memory resident (outside the context of a bucket)
kv_datatype_count: 7.0.2 gauge Count of items in memory with a given datatype combination
kv_dcp_backoff: 7.0.0 gauge Number of times Consumer DCP connections (i.e., replica) have paused consuming items because memory usage is too high
kv_dcp_connection_count: 7.0.0 gauge Current number of DCP connections (Consumers or Producers)
kv_dcp_count: 7.0.0 gauge Current number of DCP connections
kv_dcp_items_backfilled: 7.2.1 gauge Number of items pushed into the DCP stream ready queue from a backfill
kv_dcp_items_remaining: 7.0.0 gauge Current total number of items remaining for to be sent for all outgoing DCP streams (approximate)
kv_dcp_items_sent: 7.0.0 gauge Total number of items sent out by all currently existing outgoing DCP streams, since each stream was created
kv_dcp_max_running_backfills: 7.0.2 gauge Maximum number of backfills across all DCP connections
kv_dcp_num_running_backfills: 7.0.2 gauge Total number of running backfills across all DCP connections
kv_dcp_paused_count: 7.6.0 gauge Count of how many times the DCP connection has been paused
kv_dcp_ready_queue_size_bytes: 7.1.0 gauge / bytes Estimated memory usage of items waiting to be sent across all existing DCP connections
kv_dcp_stream_count: 7.6.0 gauge Current number of Streams (Active or Passive)
kv_dcp_total_data_size_bytes: 7.0.0 gauge / bytes Total data sent across all existing DCP connections
kv_dcp_total_uncompressed_data_size_bytes: 7.0.0 gauge / bytes Total equivalent uncompressed size of data sent across all existing DCP connections
kv_dcp_unpaused_count: 7.6.0 gauge Count of how many times the DCP connection has been unpaused
kv_disk_seconds: 7.0.0 histogram / seconds time spent waiting for disk
kv_domain_memory_used_bytes: 7.1.0 gauge / bytes Current memory used in KV for primary/secondary domain
kv_ep_access_scanner_enabled: 7.0.0 gauge True if access scanner task is enabled
kv_ep_access_scanner_last_runtime_seconds: 7.0.0 gauge / seconds Number of seconds that last Access Scanner task run took to complete.
kv_ep_access_scanner_num_items: 7.0.0 gauge Number of items that last Access Scanner task run wrote to the Access Log.
kv_ep_ahead_exceptions: 7.0.0 counter Total number of times a vbucket saw an item with a HLC CAS from too far in the future (indicating the clock is behind)
kv_ep_allow_sanitize_value_in_deletion: 7.0.0 gauge Let EPE delete/prepare/del_with_meta prune any invalid body in the payload instead of failing
kv_ep_alog_block_size: 7.0.0 gauge Logging block size.
kv_ep_alog_max_stored_items: 7.0.0 gauge The maximum number of items the Access Scanner will hold in memory before commiting them to disk
kv_ep_alog_resident_ratio_threshold: 7.0.0 gauge Resident ratio percentage above which we do not generate access log
kv_ep_alog_sleep_time: 7.0.0 gauge Number of minutes between each sweep for the access log
kv_ep_alog_task_time: 7.0.0 gauge Hour in GMT time when access scanner task is scheduled to run
kv_ep_arena_memory_allocated_bytes: 7.6.0 gauge / bytes The total memory allocated from the engine's arena
kv_ep_arena_memory_resident_bytes: 7.6.0 gauge / bytes The resident set size of the engine's arena
kv_ep_backfill_mem_threshold: 7.0.0 gauge Memory usage threshold (percentage of bucket quota) after which backfill will be snoozed.
kv_ep_behind_exceptions: 7.0.0 counter Total number of times a vbucket saw an item with a HLC CAS from too far in the past (indicating the clock is ahead)
kv_ep_bfilter_enabled: 7.0.0 gauge Enable or disable the bloom filter
kv_ep_bfilter_fp_prob: 7.0.0 gauge Bloomfilter: Allowed probability for false positives
kv_ep_bfilter_key_count: 7.0.0 gauge Bloomfilter: Estimated key count per vbucket
kv_ep_bfilter_residency_threshold: 7.0.0 gauge If resident ratio (during full eviction) were found less than this threshold, compaction will include all items into bloomfilter
kv_ep_bg_fetch_avg_read_amplification_ratio: 7.0.0 gauge / ratio Average read amplification for all background fetch operations - ratio of read()s to documents fetched.
kv_ep_bg_fetched: 7.0.0 counter Number of items fetched from disk
kv_ep_bg_fetched_compaction: 7.1.5 counter The number of bgfetches which are triggered by compaction
kv_ep_bg_load_avg_seconds: 7.0.0 gauge / seconds The average time for an item to be loaded from disk
kv_ep_bg_load_seconds: 7.0.0 counter / seconds The total elapsed time for items to be loaded from disk
kv_ep_bg_max_load_seconds: 7.0.0 gauge / seconds The longest load time when loading from disk
kv_ep_bg_max_wait_seconds: 7.0.0 gauge / seconds The longest time in the queue waiting to be loaded from disk
kv_ep_bg_meta_fetched: 7.0.0 counter Number of metadata fetches from disk
kv_ep_bg_min_load_seconds: 7.0.0 gauge / seconds The shortest load time when loading from disk
kv_ep_bg_min_wait_seconds: 7.0.0 gauge / seconds The shortest time in the queue waiting to be loaded from disk
kv_ep_bg_num_samples: 7.0.0 gauge The number of samples included in the average
kv_ep_bg_remaining_items: 7.0.0 gauge Number of remaining bg fetch items
kv_ep_bg_remaining_jobs: 7.0.0 gauge Number of remaining bg fetch jobs
kv_ep_bg_wait_avg_seconds: 7.0.0 gauge / seconds The average wait time for an item before it's serviced by the dispatcher
kv_ep_bg_wait_seconds: 7.0.0 gauge / seconds The total elapse time for the wait queue
kv_ep_blob_num: 7.0.0 gauge The number of blob objects in the cache
kv_ep_blob_num_allocated_total: 7.6.0 counter The number of blob object allocations
kv_ep_blob_num_freed_total: 7.6.0 counter The number of blob object deallocations
kv_ep_bucket_quota_change_task_poll_interval: 7.0.0 gauge Time in seconds between the BucketQuotaChangeTask polling memory usage to attempt to reduce the bucket quota
kv_ep_cache_size: 7.0.0 gauge Memory quota (in bytes) for this bucket.
kv_ep_checkpoint_computed_max_size_bytes: 7.1.0 gauge / bytes Actual max size in bytes of a single Checkpoint
kv_ep_checkpoint_consumer_limit_bytes: 7.6.2 gauge / bytes Max allocation allowed in all checkpoints (including the dcp consumer buffer quota)
kv_ep_checkpoint_destruction_tasks: 7.0.0 gauge Number of tasks responsible for destroying closed unreferenced checkpoints.
kv_ep_checkpoint_max_size: 7.0.0 gauge Max size (in bytes) of a single checkpoint. '0' for EPEngine auto-setup.
kv_ep_checkpoint_memory_bytes: 7.0.0 gauge / bytes Memory of items in all checkpoints
kv_ep_checkpoint_memory_pending_destruction_bytes: 7.1.0 gauge / bytes Memory of checkpoint structures awaiting destruction by a background task
kv_ep_checkpoint_memory_quota_bytes: 7.1.0 gauge / bytes Max allocation allowed in all checkpoints
kv_ep_checkpoint_memory_ratio: 7.0.0 gauge Max ratio of the bucket quota that can be allocated in checkpoints. The system enters a TempOOM phase if hit.
kv_ep_checkpoint_memory_recovery_lower_mark: 7.0.0 gauge Fraction of the checkpoint quota (as computed by checkpoint_memory_ratio) that represents the target of checkpoint memory recovery. Memory recovery yields when reached.
kv_ep_checkpoint_memory_recovery_lower_mark_bytes: 7.1.0 gauge Fraction of the checkpoint quota (as computed by checkpoint_memory_ratio) that represents the target of checkpoint memory recovery. Memory recovery yields when reached
kv_ep_checkpoint_memory_recovery_upper_mark: 7.0.0 gauge Fraction of the checkpoint quota (as computed by checkpoint_memory_ratio) that triggers attempt of memory releasing from checkpoint.
kv_ep_checkpoint_memory_recovery_upper_mark_bytes: 7.1.0 gauge Fraction of the checkpoint quota (as computed by checkpoint_memory_ratio) that triggers attempt of memory releasing from checkpoint
kv_ep_checkpoint_remover_task_count: 7.0.0 gauge Number of concurrent tasks performing ItemExpel and CursorDrop/CheckpointRemoval
kv_ep_chk_expel_enabled: 7.0.0 gauge Enable the ability to expel (remove from memory) items from a checkpoint. An item can be expelled if all cursors in the checkpoint have iterated past the item.
kv_ep_chk_persistence_remains: 7.0.0 gauge Number of remaining vbuckets for checkpoint persistence
kv_ep_clock_cas_drift_threshold_exceeded: 7.0.0 gauge ep_active_ahead_exceptions + ep_replica_ahead_exceptions
kv_ep_collections_drop_compaction_delay: 7.0.0 gauge How many milliseconds before compaction runs following the drop of a collection
kv_ep_collections_enabled: 7.0.0 gauge Enable the collections functionality, enabling the storage of collection metadata
kv_ep_commit_num: 7.0.0 gauge Total number of write commits
kv_ep_commit_time_seconds: 7.0.0 gauge / seconds Number of milliseconds of most recent commit
kv_ep_commit_time_total_seconds: 7.0.0 gauge / seconds Cumulative milliseconds spent committing
kv_ep_compaction_aborted: 7.1.0 gauge Counter of how many times compaction aborted, e.g. the vbucket is required to rollback, so compaction is aborted
kv_ep_compaction_expire_from_start: 7.0.0 gauge Should compaction expire items that were logically deleted at the start of the compaction (true) or at the point in time at which they were visited (false)?
kv_ep_compaction_expiry_fetch_inline: 7.0.0 gauge If compaction requires a bgfetch before attempting expiry to ensure it does not expire an older version of the document, true: fetch it in the compaction thread. false: queue a bgfetch for the bgfetcher task to complete
kv_ep_compaction_failed: 7.1.0 gauge Counter of how many times compaction has failed, e.g. a system call error caused compaction to fail
kv_ep_compaction_max_concurrent_ratio: 7.0.0 gauge Maximum number of CompactVBucketTask tasks which can run concurrently, as a fraction of the possible Writer task concurrency. Note that a minimum of 1, and a maximum of N-1 CompactVBucketTasks will be run (where N is the possible Writer task concurrency), to ensure both forward progress for Compaction and Flushing.
kv_ep_concurrent_pagers: 7.0.0 gauge Number of eviction pager tasks to create when memory usage is high
kv_ep_connection_cleanup_interval: 7.0.0 gauge How often connection manager task should release dead connections (in seconds).
kv_ep_connection_manager_interval: 7.0.0 gauge How often connection manager task should be run (in seconds).
kv_ep_continuous_backup_callback_count: 8.0.0 gauge Number of times the continuous backup metadata callback was run.
kv_ep_continuous_backup_callback_time_seconds: 8.0.0 gauge / seconds Time spent in KV in the continuous backup metadata callback.
kv_ep_continuous_backup_enabled: 7.0.0 gauge True if continouous backup is enabled.
kv_ep_continuous_backup_interval: 7.0.0 gauge The continouous backup interval (in seconds).
kv_ep_couchstore_file_cache_max_size: 7.0.0 gauge Maximum number of couchstore files that we will keep open. Default value is 30 * 1024 (i.e. one file for each vBucket and 30 Buckets - the supported limit).
kv_ep_couchstore_midpoint_rollback_optimisation: 7.0.0 gauge Should we have to rollback more than half of the seqnos seen by this vBucket we will instead rollback to 0 and re-stream from the active if set to true
kv_ep_couchstore_mprotect: 7.0.0 gauge Enable couchstore to mprotect the iobuffer
kv_ep_couchstore_tracing: 7.0.0 gauge Enable couchstore tracing
kv_ep_couchstore_write_validation: 7.0.0 gauge Validate couchstore writes
kv_ep_cross_bucket_ht_quota_sharing: 7.0.0 gauge Allow this Bucket's HashTable quota to be shared with other Buckets which have this setting enabled.
kv_ep_cursors_dropped: 7.0.0 gauge Number of cursors dropped by the checkpoint remover
kv_ep_data_read_failed: 7.0.0 gauge Total number of get failures
kv_ep_data_traffic_enabled: 7.0.0 gauge True if we want to enable data traffic after warmup is complete
kv_ep_data_write_failed: 7.0.0 gauge Total compaction and commit failures
kv_ep_db_data_size_bytes: 7.0.0 gauge / bytes Total size of valid data in db files
kv_ep_db_file_size_bytes: 7.0.0 gauge / bytes Total size of the db files
kv_ep_db_history_file_size_bytes: 7.2.0 gauge / bytes The total size of all history currently stored by the bucket
kv_ep_db_history_start_timestamp_seconds: 7.2.0 gauge / seconds The timestamp of the oldest document stored in the history window, oldest of all vbuckets
kv_ep_db_prepare_size_bytes: 7.0.0 gauge / bytes Total size of SyncWrite prepares in db files
kv_ep_dcp_backfill_byte_drain_ratio: 7.0.0 gauge What ratio of the dcp_backfill_byte_limit must be drained for un-pausing a paused backfill
kv_ep_dcp_backfill_byte_limit: 7.0.0 gauge Max bytes a connection can backfill into memory before backfill is paused
kv_ep_dcp_backfill_idle_disk_threshold: 7.0.0 gauge The percentage of disk usage at which DCP backfills would be ended when no progress is made for dcp_backfill_idle_limit_seconds
kv_ep_dcp_backfill_idle_limit_seconds: 7.0.0 gauge How long (in seconds) a DCP Backfill can be held open with no progress being made. When this limit is exceeded the stream is force ended (reason Slow) releasing the resources being held by the stream. The default value is 2x of dcp_idle_timeout
kv_ep_dcp_backfill_idle_protection_enabled: 7.0.0 gauge When true, DCP backfills will be checked for progress. Any backfill which makes no progress for dcp_backfill_idle_limit_seconds will be subject to further checks. If the directory referenced by dbname is over dcp_backfill_idle_disk_threshold percent used and cancelling the backfill will free disk space, the scan cancels and the associated DCP stream will end with reason slow.
kv_ep_dcp_backfill_in_progress_per_connection_limit: 7.0.0 gauge The maximum number of backfills each connection can have in-progress (i.e. KVStore snapshot open and reading data from)
kv_ep_dcp_backfill_run_duration_limit: 7.0.0 gauge Maximum time (in ms) backfill task will run before yielding.
kv_ep_dcp_checkpoint_dequeue_limit: 7.0.0 gauge The limit given to CheckpointManager::getNextItemsForDcp by ActiveStream
kv_ep_dcp_consumer_buffer_ratio: 7.0.0 gauge Ratio of the BucketQuota that can be allocated by all DCP consumers for buffered messages
kv_ep_dcp_consumer_flow_control_ack_ratio: 7.0.0 gauge Ratio of freed bytes in the DCP Consumer buffer that triggers a BufferAck message to the Producer
kv_ep_dcp_consumer_flow_control_ack_seconds: 7.0.0 gauge Max seconds after which a Consumer acks all the remaining freed bytes, regardless of whether dcp_consumer_flow_control_ack_ratio has kicked-in or not
kv_ep_dcp_consumer_flow_control_enabled: 7.0.0 gauge Whether DCP Consumer on this node enable flow control
kv_ep_dcp_enable_noop: 7.0.0 gauge Whether DCP Consumer connections should attempt to negotiate no-ops with the Producer
kv_ep_dcp_idle_timeout: 7.0.0 gauge The maximum number of seconds between dcp messages before a connection is disconnected
kv_ep_dcp_min_compression_ratio: 7.0.0 gauge Compression ratio to be achieved above which producer will ship documents as is
kv_ep_dcp_noop_mandatory_for_v5_features: 7.0.0 gauge Forces clients to enable noop for v5 features
kv_ep_dcp_noop_tx_interval: 7.0.0 gauge The time interval in seconds between noop messages being sent to the consumer
kv_ep_dcp_oso_backfill_large_value_ratio: 7.0.0 gauge When considering out-of-seqno order (OSO) DCP backfill for a collection with 'large' mean value size, OSO will only be selected if the backfilling collection item count is less than this fraction of the vBucket item count. Whether the collection has 'small' or 'large' items depends on the value of 'dcp_oso_backfill_mean_item_size_threshold'.
kv_ep_dcp_oso_backfill_small_item_size_threshold: 7.0.0 gauge When considering out-of-seqno order (OSO) DCP backfill for a collection, should the items in the collection be considered 'small' or 'large' and subsequently should backfill use 'dcp_oso_backfill_small_value_collection_ratio' or 'dcp_oso_backfill_large_value_collection_ratio' when deciding ot use OSO or not? Collections whoss mean on-disk value size is less than this parameter are considered 'small', otherwise they are considered 'large'
kv_ep_dcp_oso_backfill_small_value_ratio: 7.0.0 gauge When considering out-of-seqno order (OSO) DCP backfill for a collection with 'small' mean value size, OSO will only be selected if the backfilling collection item count is less than this fraction of the vBucket item count. Whether the collection has 'small' or 'large' items depends on the value of 'dcp_oso_backfill_mean_item_size_threshold'.
kv_ep_dcp_oso_max_collections_per_backfill: 7.0.0 gauge This is the maximum number of collections that a DCP stream can be filtering to be eligible for OSO
kv_ep_dcp_producer_catch_exceptions: 7.0.0 gauge If true, ActiveStream will catch exceptions during item processing and close the stream's related connection (and thus all streams for that connection). If false, exception will be re-thrown.
kv_ep_dcp_producer_processor_run_duration_us: 7.0.0 gauge The approximate maximum runtime in microseconds for ActiveStreamCheckpointProcessorTask
kv_ep_dcp_producer_snapshot_marker_yield_limit: 7.0.0 gauge Not in use - replaced by dcp_producer_processor_run_duration_us
kv_ep_dcp_scan_byte_limit: 7.0.0 gauge Max bytes that can be read in a single backfill scan before yielding
kv_ep_dcp_scan_item_limit: 7.0.0 gauge Max items that can be read in a single backfill scan before yielding
kv_ep_dcp_takeover_max_time: 7.0.0 gauge Max amount of time for takeover send (in seconds) after which front end ops would return ETMPFAIL
kv_ep_defragmenter_age_threshold: 7.0.0 gauge How old (measured in number of DefragmenterVisitor passes) must a document be to be considered for defragmentation.
kv_ep_defragmenter_auto_lower_threshold: 7.0.0 gauge When mode is not static and scored fragmentation is above this value, a sleep time between defragmenter_auto_min_sleep and defragmenter_auto_max_sleep will be used
kv_ep_defragmenter_auto_max_sleep: 7.0.0 gauge The maximum sleep that the auto controller can set
kv_ep_defragmenter_auto_min_sleep: 7.0.0 gauge The minimum sleep that the auto controller can set
kv_ep_defragmenter_auto_pid_d: 7.0.0 gauge The d term for the PID controller
kv_ep_defragmenter_auto_pid_dt: 7.0.0 gauge The dt (interval) term for the PID controller. Value represents milliseconds
kv_ep_defragmenter_auto_pid_i: 7.0.0 gauge The i term for the PID controller
kv_ep_defragmenter_auto_pid_p: 7.0.0 gauge The p term for the PID controller
kv_ep_defragmenter_auto_upper_threshold: 7.0.0 gauge When mode is auto_linear and scored fragmentation is above this value, the defragmenter will use defragmenter_auto_min_sleep
kv_ep_defragmenter_chunk_duration: 7.0.0 gauge Maximum time (in ms) defragmentation task will run for before being paused (and resumed at the next defragmenter_interval).
kv_ep_defragmenter_enabled: 7.0.0 gauge True if defragmenter task is enabled
kv_ep_defragmenter_interval: 7.0.0 gauge How often defragmenter task should be run (in seconds).
kv_ep_defragmenter_num_moved: 7.0.0 gauge Number of items moved by the defragmentater task.
kv_ep_defragmenter_num_visited: 7.0.0 gauge Number of items visited (considered for defragmentation) by the defragmenter task.
kv_ep_defragmenter_sleep_time_seconds: 7.6.0 gauge / seconds The amount of time the defragmenter task will sleep before it is scheduled to run again.
kv_ep_defragmenter_stored_value_age_threshold: 7.0.0 gauge How old (measured in number of DefragmenterVisitor passes) must a StoredValue be to be considered for defragmentation.
kv_ep_defragmenter_sv_num_moved: 7.0.0 gauge Number of StoredValues moved by the defragmentater task.
kv_ep_degraded_mode: 7.0.0 gauge True if the engine is either warming up or data traffic is disabled
kv_ep_diskqueue_drain: 7.0.0 gauge Total drained items on disk queue
kv_ep_diskqueue_fill: 7.0.0 gauge Total enqueued items on disk queue
kv_ep_diskqueue_items: 7.0.0 gauge Total items in disk queue
kv_ep_diskqueue_memory_bytes: 7.0.0 gauge / bytes Total memory used in disk queue
kv_ep_diskqueue_pending: 7.0.0 gauge Total bytes of pending writes
kv_ep_ephemeral_mem_recovery_enabled: 7.0.0 gauge Whether ephemeral memory recovery task is enabled. If disabled, ItemPager will carry out memory recovery for AutoDelete buckets.
kv_ep_ephemeral_mem_recovery_sleep_time: 7.0.0 gauge Duration in milliseconds the EphemeralMemRecovery task will sleep between periodic executions.
kv_ep_ephemeral_metadata_mark_stale_chunk_duration: 7.0.0 gauge Maximum time (in ms) ephemeral hash table cleaner task will run for before being paused (and resumed at the next ephemeral_metadata_purge_interval).
kv_ep_ephemeral_metadata_purge_age: 7.0.0 gauge Age in seconds after which Ephemeral metadata is purged entirely from memory. Purging disabled if set to -1.
kv_ep_ephemeral_metadata_purge_interval: 7.0.0 gauge Time in seconds between automatic, periodic runs of the Ephemeral metadata purge task. Periodic purging disabled if set to 0.
kv_ep_ephemeral_metadata_purge_stale_chunk_duration: 7.0.0 gauge Maximum time (in ms) ephemeral stale metadata purge task will run for before being paused (and resumed at the next ephemeral_metadata_purge_interval).
kv_ep_exp_pager_enabled: 7.0.0 gauge True if expiry pager task is enabled
kv_ep_exp_pager_initial_run_time: 7.0.0 gauge Hour in GMT time when expiry pager can be scheduled for initial run
kv_ep_exp_pager_stime: 7.0.0 gauge Number of seconds between expiry pager runs.
kv_ep_expired_access: 7.0.0 gauge Number of times an item was expired on application access
kv_ep_expired_compactor: 7.0.0 gauge Number of times an item was expired by the compactor
kv_ep_expired_pager: 7.0.0 gauge Number of times an item was expired by the item pager
kv_ep_expiry_pager_concurrency: 7.0.0 gauge Number of tasks which are created to scan for and delete expired items
kv_ep_expiry_visitor_expire_after_visit_duration_ms: 7.0.0 gauge The time limit in milliseconds for processing expired items after visiting hash tables. After finding expired items during hash table traversal, the expiry pager will process them until this duration is reached before yielding.
kv_ep_expiry_visitor_items_only_duration_ms: 7.0.0 gauge The time limit in milliseconds for processing items from the expired items list at the start of an expiry pager run. If the expired items list is not empty when the pager starts, it will only process items from this list for up to this duration before yielding.
kv_ep_failpartialwarmup: 7.0.0 gauge If true then do not allow traffic to be enabled to the bucket if warmup didn't complete successfully
kv_ep_flush_batch_max_bytes: 7.0.0 gauge Max size (in bytes) of a single flush-batch passed to the KVStore for persistence.
kv_ep_flush_duration_total_seconds: 7.0.0 gauge / seconds Cumulative milliseconds spent flushing
kv_ep_flusher_todo: 7.0.0 gauge Number of items currently being written
kv_ep_flusher_total_batch_limit: 7.0.0 gauge Number of items that all flushers can be currently flushing. Each flusher has flusher_total_batch_limit / num_writer_threads individual batch size. Individual batches may be larger than this value, as we cannot split Memory checkpoints across multiple commits.
kv_ep_freq_counter_increment_factor: 7.0.0 gauge The increment factor of the ProbabilisticCounter being used for the frequency counter. The default value of 0.012 is set such that it allows an 8-bit ProbabilisticCounter to mimic a uint16 counter. See the comment on the ProbabilisticCounter class for more information.
kv_ep_fsync_after_every_n_bytes_written: 7.0.0 gauge Perform a file sync() operation after every N bytes written. Disabled if set to 0.
kv_ep_fusion_bytes_migrated_bytes: 8.0.0 counter / bytes Total number of bytes migrated over from the mounted source to the host volume.
kv_ep_fusion_bytes_synced_bytes: 8.0.0 counter / bytes Total number of bytes synced to FusionLogStore.
kv_ep_fusion_extent_merger_bytes_read_bytes: 8.0.0 counter / bytes Total number of bytes read in order to merge extents.
kv_ep_fusion_extent_merger_reads: 8.0.0 counter / count Total number of read IOs issued in order to merge extents.
kv_ep_fusion_file_map_mem_used_bytes: 8.0.0 gauge / bytes Total amount of memory consumed by file map.
kv_ep_fusion_log_clean_bytes_read_bytes: 8.0.0 counter / bytes Total number of bytes read in order to clean the logs.
kv_ep_fusion_log_clean_reads: 8.0.0 counter / count Total number of read IOs issued in order to clean the logs.
kv_ep_fusion_log_store_garbage_size_bytes: 8.0.0 gauge / bytes Total size of the garbage data present on FusionLogStore.
kv_ep_fusion_log_store_pending_delete_size_bytes: 8.0.0 gauge / bytes Total number of bytes not yet deleted from FusionLogStore.
kv_ep_fusion_log_store_reads: 8.0.0 counter / count Total Number of read operations issued to FusionLogStore. The read maybe answered locally if there's a cache hit. This stats also includes ep_fusion_log_store_remote_gets.
kv_ep_fusion_log_store_remote_deletes: 8.0.0 counter / count Total number of DELETE operations issued to FusionLogStore.
kv_ep_fusion_log_store_remote_gets: 8.0.0 counter / count Total number of GET operations issued to FusionLogStore.
kv_ep_fusion_log_store_remote_lists: 8.0.0 counter / count Total number of LIST operations issued to FusionLogStore.
kv_ep_fusion_log_store_remote_puts: 8.0.0 counter / count Total number of PUT operations issued to FusionLogStore.
kv_ep_fusion_log_store_size_bytes: 8.0.0 gauge / bytes Total size of all the logs on FusionLogStore.
kv_ep_fusion_logs_cleaned: 8.0.0 counter / count Total number of logs cleaned because their garbage size crossed the fragmentation threshold.
kv_ep_fusion_logs_migrated: 8.0.0 counter / count Total number of logs migrated over from the mounted source to the host volume.
kv_ep_fusion_migration_completed_bytes_bytes: 8.0.0 gauge / bytes Total number of bytes completed in the migration.
kv_ep_fusion_migration_failures: 8.0.0 counter / count Total number of times migrating logs failed.
kv_ep_fusion_migration_total_bytes_bytes: 8.0.0 gauge / bytes Total number of bytes in the migration.
kv_ep_fusion_num_file_extents: 8.0.0 gauge / count Number of file extents on Fusion.
kv_ep_fusion_num_files: 8.0.0 gauge / count Number of files on Fusion.
kv_ep_fusion_num_log_segments: 8.0.0 gauge / count Number of log segments on Fusion.
kv_ep_fusion_num_logs_mounted: 8.0.0 counter / count Number of logs mounted on Fusion for the purpose of extent migration.
kv_ep_fusion_sync_failures: 8.0.0 counter / count Total number of times syncing data to Fusion failed.
kv_ep_fusion_sync_session_completed_bytes_bytes: 8.0.0 gauge / bytes Total number of bytes completed in the sync session.
kv_ep_fusion_sync_session_total_bytes_bytes: 8.0.0 gauge / bytes Total number of bytes in the sync session.
kv_ep_fusion_syncs: 8.0.0 counter / count Total number of times data was synced to Fusion.
kv_ep_fusion_total_file_size_bytes: 8.0.0 gauge / bytes Total size of all files on Fusion.
kv_ep_getl_default_timeout: 7.0.0 gauge The default timeout for a getl lock in (s)
kv_ep_getl_max_timeout: 7.0.0 gauge The maximum timeout for a getl lock in (s)
kv_ep_history_retention_bytes: 7.0.0 gauge Max bytes of history a bucket should aim to retain on disk.

Continued on page 2.