Metrics reference
Enterprise Edition

This section describes the following:

General-purpose metrics
Metrics specific to Causal Clustering
Java Virtual Machine metrics

General-purpose metrics

Table 1. Database checkpointing metrics
Name	Description
`neo4j.check_point.events`	The total number of check point events executed so far
`neo4j.check_point.total_time`	The total time spent in check pointing so far
`neo4j.check_point.check_point_duration`	The duration of the check point event

Table 2. Database data metrics
Name	Description
`neo4j.ids_in_use.relationship_type`	The total number of different relationship types stored in the database
`neo4j.ids_in_use.property`	The total number of different property names used in the database
`neo4j.ids_in_use.relationship`	The total number of relationships stored in the database
`neo4j.ids_in_use.node`	The total number of nodes stored in the database

Table 3. Database page cache metrics
Name	Description
`neo4j.page_cache.eviction_exceptions`	The total number of exceptions seen during the eviction process in the page cache
`neo4j.page_cache.flushes`	The total number of flushes executed by the page cache
`neo4j.page_cache.unpins`	The total number of page unpins executed by the page cache
`neo4j.page_cache.pins`	The total number of page pins executed by the page cache
`neo4j.page_cache.evictions`	The total number of page evictions executed by the page cache
`neo4j.page_cache.page_faults`	The total number of page faults happened in the page cache
`neo4j.page_cache.hits`	The total number of page hits happened in the page cache
`neo4j.page_cache.hit_ratio`	The ratio of hits to the total number of lookups in the page cache
`neo4j.page_cache.usage_ratio`	The ratio of number of used pages to total number of available pages

Table 4. Database transaction metrics
Name	Description
`neo4j.transaction.started`	The total number of started transactions
`neo4j.transaction.peak_concurrent`	The highest peak of concurrent transactions
`neo4j.transaction.active`	The number of currently active transactions
`neo4j.transaction.active_read`	The number of currently active read transactions
`neo4j.transaction.active_write`	The number of currently active write transactions
`neo4j.transaction.committed`	The total number of committed transactions
`neo4j.transaction.committed_read`	The total number of committed read transactions
`neo4j.transaction.committed_write`	The total number of committed write transactions
`neo4j.transaction.rollbacks`	The total number of rolled back transactions
`neo4j.transaction.rollbacks_read`	The total number of rolled back read transactions
`neo4j.transaction.rollbacks_write`	The total number of rolled back write transactions
`neo4j.transaction.terminated`	The total number of terminated transactions
`neo4j.transaction.terminated_read`	The total number of terminated read transactions
`neo4j.transaction.terminated_write`	The total number of terminated write transactions
`neo4j.transaction.last_committed_tx_id`	The ID of the last committed transaction
`neo4j.transaction.last_closed_tx_id`	The ID of the last closed transaction

Table 5. Cypher metrics
Name	Description
`neo4j.cypher.replan_events`	The total number of times Cypher has decided to re-plan a query
`neo4j.cypher.replan_wait_time`	The total number of seconds waited between query replans

Table 6. Database log rotation metrics
Name	Description
`neo4j.log_rotation.events`	The total number of transaction log rotations executed so far
`neo4j.log_rotation.total_time`	The total time spent in rotating transaction logs so far
`neo4j.log_rotation.log_rotation_duration`	The duration of the log rotation event

Table 7. Bolt metrics
Name	Description
`neo4j.bolt.sessions_started`	The total number of Bolt sessions started since this instance started. This includes both succeeded and failed sessions (deprecated, use connections_opened instead).
`neo4j.bolt.connections_opened`	The total number of Bolt connections opened since this instance started. This includes both succeeded and failed connections.
`neo4j.bolt.connections_closed`	The total number of Bolt connections closed since this instance started. This includes both properly and abnormally ended connections.
`neo4j.bolt.connections_running`	The total number of Bolt connections currently being executed.
`neo4j.bolt.connections_idle`	The total number of Bolt connections sitting idle.
`neo4j.bolt.messages_received`	The total number of messages received via Bolt since this instance started.
`neo4j.bolt.messages_started`	The total number of messages that began processing since this instance started. This is different from messages received in that this counter tracks how many of the received messages havebeen taken on by a worker thread.
`neo4j.bolt.messages_done`	The total number of messages that completed processing since this instance started. This includes successful, failed and ignored Bolt messages.
`neo4j.bolt.messages_failed`	The total number of messages that failed processing since this instance started.
`neo4j.bolt.accumulated_queue_time`	The accumulated time messages have spent waiting for a worker thread.
`neo4j.bolt.accumulated_processing_time`	The accumulated time worker threads have spent processing messages.

Table 8. Server metrics
Name	Description
`neo4j.server.threads.jetty.idle`	The total number of idle threads in the jetty pool
`neo4j.server.threads.jetty.all`	The total number of threads (both idle and busy) in the jetty pool

Metrics specific to Causal Clustering

Table 9. Core metrics
Name	Description
`neo4j.causal_clustering.core.append_index`	Append index of the RAFT log
`neo4j.causal_clustering.core.commit_index`	Commit index of the RAFT log
`neo4j.causal_clustering.core.term`	RAFT Term of this server
`neo4j.causal_clustering.core.tx_retries`	Transaction retries
`neo4j.causal_clustering.core.is_leader`	Is this server the leader?
`neo4j.causal_clustering.core.in_flight_cache.total_bytes`	In-flight cache total bytes
`neo4j.causal_clustering.core.in_flight_cache.max_bytes`	In-flight cache max bytes
`neo4j.causal_clustering.core.in_flight_cache.element_count`	In-flight cache element count
`neo4j.causal_clustering.core.in_flight_cache.max_elements`	In-flight cache maximum elements
`neo4j.causal_clustering.core.in_flight_cache.hits`	In-flight cache hits
`neo4j.causal_clustering.core.in_flight_cache.misses`	In-flight cache misses
`neo4j.causal_clustering.core.message_processing_delay`	Delay between RAFT message receive and process
`neo4j.causal_clustering.core.message_processing_timer`	Timer for RAFT message processing
`neo4j.causal_clustering.core.replication_new`	Raft replication new request count
`neo4j.causal_clustering.core.replication_attempt`	Raft replication attempt count
`neo4j.causal_clustering.core.replication_success`	Raft Replication success count
`neo4j.causal_clustering.core.replication_fail`	Raft Replication fail count

Table 10. Read Replica Metrics
Name	Description
`neo4j.causal_clustering.read_replica.pull_updates`	The total number of pull requests made by this instance
`neo4j.causal_clustering.read_replica.pull_update_highest_tx_id_requested`	The highest transaction id requested in a pull update by this instance
`neo4j.causal_clustering.read_replica.pull_update_highest_tx_id_received`	The highest transaction id that has been pulled in the last pull updates by this instance

Java Virtual Machine Metrics

These metrics are environment dependent and they may vary on different hardware and with JVM configurations. Typically these metrics will show information about garbage collections (for example the number of events and time spent collecting), memory pools and buffers, and finally the number of active threads running.