List of Hazelcast Metrics

Description

Mean time to execute gets on the cache

Mean time to execute puts on the cache

Mean time to execute removes on the cache

Number of evictions on the cache

Number of gets on the cache

Number of successful get operations, hits, on the cache

Percentage of successful get operations, hits, out of all get operations on the cache

Number of puts to the cache

Number of removals from the cache

Number of missed cache accesses on the cache

Percentage of missed cache accesses out of all the cache accesses/access attempts

Creation time of the cache on the member

Cache’s last access time

Cache’s last update time

Locally owned entry count in the cache

Number of classes that are currently loaded

Total number of classes that have been loaded since the instance has started execution.

Total number of unloaded classes.

Number of active client endpoints for this member

Total number of client endpoint registrations

Start time of the cluster (when the first member in cluster becomes master, its localClockTime value is saved as clusterStartTime)

Elapsed time since the master member was created (cluster.clock.clusterStartTime)

Difference between the local time (cluster.clock.localClockTime) of the local member and the master member

Uptime of the cluster (current time - cluster.clock.clusterStartTime)

Member’s local clock timestamp

Maximum observed cluster time difference

Connection close time for this connection

Connection ID for this client connection

Number of event handlers for this client connection

Last time that this member sent a heartbeat to other known cluster members

Number of members in the cluster

Value of this IAtomicLong

Initial count of ICountDownLatch

Remaining number of expected countdowns

Round number of the ICountDownLatch; each time ICountDownLatch is initialized with a new count after it downs to zero, a new round begins

Maximum number of reentrant acquires of this FencedLock

Total number of times this FencedLock has been acquired since its creation

Address of the FencedLock owner

Session Id of the FencedLock owner

Number of the remaining available permits

State value which shows whether semaphore is initialized with a value or not; in exposed metrics, it shows 0 when semaphore is not initialized, a positive value otherwise

Creation time of this session

Address of the endpoint which the CP session session belongs to

Type of the endpoint; either SERVER or CLIENT

Expiration time of the CP session

Version number of the CP session, basically it shows how many times the session heartbeat is received

Total number of events pending to be processed

Total number of processed events

Number of subscribed listeners for the specified service

Number of published events for the specified service

Queue capacity of the executor processing the events (this capacity is shared for all events)

Number of rejected events; if the event is not accepted to the executor in hazelcast.event.queue.timeout.millis(see System Properties), it will be rejected and not processed

Number of failures of sync event delivery

Number of threads for the event service executor (the event thread count)

Number of events that fail to be published

Number of cancelled operations on the executor service

Number of completed operations on the executor service

Creation time of this executor on the member

Number of pending operations on the executor service

Number of started operations on the executor service

Total execution time of the finished operations

Total start latency of operations started

Number of completed tasks by this executor

Maximum number of threads in the executor’s thread pool

Number of threads in the executor’s thread pool

Number of pending tasks in this executor’s task queue

Remaining capacity on the executor’s task queue

Amount of free space in the given directory, user.home

Amount of total space in the given directory, user.home

Amount of usable space in the given directory, user.home

Total number of times the Flake ID generator has been used to generate a new ID batch

Creation time of this Flake ID Generator on the member

Total number of IDs generated (the sum of IDs for all batches)

Total number of major garbage collections (GCs) that have occurred

Accumulated elapsed time in major GCs

Total number of minor GCs that have occurred

Accumulated elapsed time in minor GCs

Number of unknown GCs that cannot be determined as minor or major (this is usually due to the lack of support of the used garbage collector)

Accumulated elapsed time in unknown GCs

Maximum number of concurrent client invocations

Number of pending client invocations on this client

Number of started client invocations on this client

Creation time of this list on the member

Last access (read) time of the locally owned items

Last update time of the locally owned items

Total number of processed events on the client listener service

Total number of tasks pending to be processed on the client listener service

Number of backups per entry

Number of backup entries held by the member

Memory cost of backup entries in this member

Creation time of the map on the member

Number of updated but not persisted yet entries, dirty entries, that the member owns

Number of local get operations on the map

Total heap cost for the map on this member

Number of reads of the locally owned entries

Total number of indexed local queries performed on the map

Last access (read) time of the locally owned entries

Last update time of the locally owned entries

Number of locked entries that the member owns

Total heap cost of the Merkle trees used

Number of local events received on the map

Total number of other operations performed on this member

Number of map entries owned by the member

Memory cost of owned map entries on this member

Number of local put operations on the map

Number of queries executed on the map (it may be imprecise for queries involving partition predicates (PartitionPredicate) on the off-heap storage)

Number of local remove operations on the map

Number of local set operations on the map

Total latency of local get operations on the map

Maximum latency of local get operations on the map

Maximum latency of local put operations on the map

Maximum latency of local remove operations on the map

Maximum latency of local set operations on the map

Total latency of local put operations on the map

Total latency of local remove operations on the map

Total latency of local set operations on the map

Average hit latency for the index on this member

Average selectivity of the hits served by the index on this member (the returned value is in the range from 0.0 to 1.0 - values close to 1.0 indicate a high selectivity meaning the index is efficient; values close to 0.0 indicate a low selectivity meaning the index efficiency is approaching an efficiency of a simple full scan)

Creation time of the index on this member

Total number of index hits (the value of this metric may be greater than the map.index.queryCount since a single query may hit the same index more than once)

Number of insert operations performed on the index

Local memory cost of the index (for on-heap indexes in OBJECT or BINARY formats, the returned value is just a best-effort approximation and doesn’t indicate a precise on-heap memory usage of the index)

Total number of queries served by the index

Number of remove operations performed on the index

Total latency of insert operations performed on the index

Total latency of remove operations performed on the index

Total latency of update operations performed on the index.

Number of update operations performed on the index

Amount of heap memory that is committed for the JVM to use

Amount of native memory that is committed for current instance (member or client) to use

Amount of free memory in the JVM of current instance (member or client)

Amount of free native memory in the current instance (member or client)

Amount of free physical memory available in OS

Maximum amount of memory that the JVM will attempt to us

Amount of native memory reserved for metadata (this memory is separate and not accounted for by the NativeMemory statistics)

Maximum amount of native memory that current instance (member or client) will attempt to use

Amount of total physical memory available in OS

Amount of used memory in the JVM of the current instance (member or client)

Amount of used metadata memory by the current instance (member or client)

Amount of used native memory by the current instance (member or client)

Cost of HD memory for the map to determine whether eviction of map entries is needed

Number of evictions performed for the HD memory store (when your eviction policy does not free enough native memory, operations that add entries to a map or cache such as map.put() trigger the forced eviction process.)

Number of entries removed from the HD memory store

Number of entries in the HD memory store

Creation time of this Near Cache on this instance (member or client)

Number of evictions of Near Cache entries owned by this instance (member or client)

Number of TTL and max-idle expirations of Near Cache entries owned by this instance (member or client)

Number of hits (reads) of Near Cache entries owned by this instance (member or client)

Number of invalidations of Near Cache entries owned by this instance (member or client).

Number of invalidations of Near Cache entries owned by this instance (member or client).

Duration of the last Near Cache key persistence

Number of persisted keys of the last Near Cache key persistence

Timestamp of the last Near Cache key persistence

Written bytes of the last Near Cache key persistence

Number of misses of Near Cache entries owned by this instance (member or client).

Number of Near Cache entries owned by this instance (member or client)

Memory cost of Near Cache entries owned by this instance (member or client)

Number of Near Cache key persistences (when the pre-load feature is enabled)

Number of executed adhoc operations

Number of current executing async operations on the operation service of the member

Number of completed operations

Number of failed backup operations on the operation service of the member

Number of executed generic operations

Number of priority generic operations pending (waiting in the priority queue)

Number of normal generic operations pending (waiting in the queue)

Number of generic operation handler threads in the member

Operation backup timeout that specifies how long the invocation will wait for acknowledgements from the backup replicas (if acks are not received from some backups, there will not be any rollback on other successful replicas)

Number of operation invocations that acknowledgment from backups has timeout

Number of times that the operation invocations have delayed

Broadcast period of operation heartbeats (this heartbeat packets sent to inform the other member about if the operation is still alive). The heartbeat period is configured to be 1/4 of the call timeout. So with default settings, every 15 seconds, every member in the cluster, will notify every other member in the cluster about all calls that are pending.

Number of received heartbeat packets

Number of sent heartbeat packets

Period for scanning over pending invocations for getting rid of duplicates, checking for heartbeat timeout, and checking for backup timeout

Timeout for operation invocations

Last issued invocation call ID

Number of times that the operation invocations have timed out

Number of pending invocations

Usage percentage of the operation invocation capacity (pending invocations/ max concurrent invocations)

Number of separate WaitSet (set of operations waiting for some condition)

Total number of parked operations

Number of executed partition operations on the specified partition

Number of partition operation handler threads for given member

Number of priority operations pending (priority partition ops. + priority generic ops.)

Number of normal operations pending (normal partition ops. + normal generic ops.)

Total number of pending responses to be processed

Number of backup acknowledgement responses

Number of error responses

Number of responses having missing invocations

Number of normal responses

Number of call timeout responses

Number of retried operations

Number of currently running operations (runningPartitionCount + runningGenericCount)

Number of currently running generic (non partition specific) operations

Number of currently running partition operations

Number of completed operations by this operation thread

Number of completed TaskBatch (a batch of tasks) by this operation thread

Number of packets that executed by this operation thread

Number of PartitionSpecificRunnable tasks executed by this operation thread

Total number of runnables executed by this operation thread

Total number of tasks (Operation + PartitionSpecificRunnable + Runnable + TaskBatch) completed on this operation thread

Total number of failed tasks on this operation thread

Number of normal pending operations (tasks)

Number of priority pending operations (tasks)

Amount of committed virtual memory (that is, the amount of virtual memory guaranteed to be available to the running process)

Amount of free physical memory

Amount of free swap space size

Maximum number of open file descriptors (only for UNIX platforms)

Number of open file descriptors (only for UNIX platforms)

Recent CPU usage for the JVM process; a negative value if not available

CPU time used by the process on which the JVM is running

Recent CPU usage for the whole system; a negative value if not available

System load average for the last minute, or a negative value if not available

Total amount of physical memory

Total amount of swap space

Number of partitions assigned to the member

Number of completed migrations on the latest repartitioning round

Total elapsed time of commit operations' executions to the destination endpoint on the latest repartitioning round

Total elapsed time of migration & replication operations' executions from source to destination endpoints on the latest repartitioning round

Total elapsed time from start of migration tasks to their completion on the latest repartitioning round

Latest time that repartition took place

Number of partitions currently owned by given member

Maximum allowed backup count according to current cluster formation and partition group configuration

Number of the member groups to be used in partition assignments

Number of active migration tasks

Number of migration tasks in the migration queue

Total partition count

Number of planned migrations on the latest repartitioning round

Number of replica sync requests

Permits count of this replica sync semaphore

Stamp value for the current partition table; stamp is calculated by hashing the individual partition versions using MurmurHash3 (if stamp has this initial value, 0L, then that means partition table is not initialized yet)

Total number of completed migrations

Total elapsed time of commit operations' executions to the destination endpoint since the beginning

Total elapsed time of migration & replication operations' executions from source to destination endpoints since the beginning

Total elapsed time from start of migration tasks to their completion since the beginning

Number of live tombstones in the persistent store; this and the below Persistence metrics have the following format when output: hz_persistence_<INSTANCE_NAME>_<CHUNK_MANAGER_ID>_<metric>

Number of live values in the persistent store

Approximate size of the garbage within the tombstone chunks (it does not account for data in the active chunk, it is incremented when a record is retired or an active chunk is turned into a stable one)

Approximate size of tombstone chunks (it does not account for data in the active chunk, it is incremented when the active chunk is turned into a stable one)

Approximate size of the garbage within the value chunk (it does not account for data in the active chunk, it is incremented when a record is retired or an active chunk is turned into a stable one)

Approximate size of value chunks (it does not account for data in the active chunk, it is incremented when the active chunk is turned into a stable one)

Creation time of the PN counter on the member

Number of subtract (including decrement) operations on this PN counter

Number of add (including increment) operations on this PN counter

Current value of the PN counter

Number of created proxies for a given service

Number of destroyed proxies for a given service

Number of active proxies for a given service

Creation time of this reliable topic on the member

Total number of published messages of this reliable topic on this member

Total number of received messages of this reliable topic on this member

Average age of the items in this member

Number of backup items held by the member

Creation time of the topic on the member

Number of event operations

Maximum age of the items in this member

Minimum age of the items in this member

Number of null returning poll operations

Number of event operations (duplicate of eventOperationCount)

Number of offer/put/add operations

Number of other operations

Number of poll/take/remove operations.

Number of rejected offers

Number of owned items in this member

Total number of operations (numberOfOffers + numberOfPolls + numberOfOtherOperations)

Destroyed raft node group IDs

Available log capacity for this CP group

Commit index of this CP group

Last applied index of this CP group

Last log index of this CP group

Last log term of this CP group

Number of members in this CP group

Raft snapshot index of this CP group

Raft term of this CP group

Commit index of the active CP members

Number of active CP members

Number of destroyed CP groups

Number of missing CP members

Number of local Raft nodes

Terminated raft node group IDs

Creation time of this replicated map on this member

Number of get operations on this member

Number of hits (reads) of the locally owned entries

Last access (read) time of the locally owned entries

Last update time of the locally owned entries

Maximum latency of get operations

Maximum latency of put operations

Maximum latency of remove operations

Number of events received on this member

Total number of other operations on this member

Number of entries owned on this member

Memory cost of owned entries on this member

Number of put operations on this member

Number of remove operations on this member

Total latency of get operations

Total latency of put operations

Total latency of remove operations

Total number of operations on this member

Number of processors available to the JVM

Amount of free memory in the JVM

Maximum amount of memory that the JVM will attempt to use

Total amount of memory in the JVM, the value of this metric may vary over time, depending on the host environment

Uptime of the JVM

Approximation to the total amount of memory currently used

Creation time of the set on the member

Last access (read) time of the locally owned items

Last update time of the locally owned items

Total number of the connections accepted by TcpServerAcceptor

Number of thrown exceptions on this TcpServerAcceptor

Idle time that measures how long this TcpServerAcceptor has not received any events

Number of times the selector was recreated

Number of times the IOBalancer detects the imbalance of loads on NioThread s

Number of completed NioPipeline migrations by the IOBalancer (these migrations are performed to fix the load imbalance problem on the NioThreads)

Number of bytes received over all connections (active and closed)

Number of bytes sent over all connections (active and closed)

Number of accepted socket channels

Number of active connections

Number of the active client connections

Number of closed connections

Number of active connection listeners

Number of TcpServerConnection

Number of connection establishments in progress

Number of opened connections

Number of connections used by text-based protocols (REST, Memcache)

Number of completed migrations on this pipeline (migrates this pipeline to a different NioThread)

Owner ID of this NioPipeline, -1 if the pipeline is being migrated (owner is null)

Number of time the NioPipeline.process() method has been called

Number of started migrations on this pipeline

Total size of frames read on this inbound pipeline

Idle time that indicates how long since the last read on this inbound nio pipeline

Number of priority frames read on this inbound nio pipeline

Number of priority frames read

Total amount of written frames on this outbound pipeline

Idle time that indicates how long since the last write on this outbound nio pipeline

Number of written normal frames on this outbound nio pipeline

Number of priority frames written into this nio pipeline

Total size of priority frames pending in the write queue

Number of priority frames pending in the write queue

Ordinal of enum state of this outbound pipeline: 0 → UNSCHEDULED, 1 → SCHEDULED, 2 → BLOCKED, 3 → RESCHEDULE

Total size of normal frames pending in the write queue

Number of normal frames pending in the write queue

Amount of transceived data on this NioThread

Total number of completed tasks on this NioThread

Total number of the connections accepted by TcpServerAcceptor

Number of transceived frames on this NioThread

Idle time that indicates the duration since the last read/write

Thread ID of this NioThread

Number of transceived priority frames

Number of processed `NioPipeline`s on this NioThread

Number of times that I/O exceptions are thrown during selection

Number of pending tasks on the queue of NioThread

Current number of live daemon thread in the JVM

Peak live thread count since the JVM started

Current number of live threads including both daemon and non-daemon threads in the JVM

Total number of threads started since the JVM started

Creation time of the topic on the member

Total number of published messages of this topic on this member

Total number of received messages of this topic on this member

Number of committed transactions

Number of rollbacked transactions

Number of started transactions

Duration of ongoing delaying, -1 if there is no current delaying

Timestamp of the last end of delaying the acknowledgments; if this value is bigger than wan.ackDelayLastStart, then there is no delaying

Timestamp of the last start of delaying the acknowledgments

Total number of the triggering delaying the WAN acknowledgments (exceeding the invocation threshold)

Total amount of time delaying the WAN acknowledgments was taking place

Number of checked partitions on the last WAN consistency check

Number of checked partitions on the last WAN consistency check

Number of different Merkle tree leaves on the last WAN consistency check

Number of partitions found to be inconsistent on the last WAN consistency check

Number of entries to synchronize to get the clusters into sync on the last WAN consistency check

Number of dropped entry events

Outbound WAN queue size on this member

Number of entry remove events

Number of entry sync events

Average of the number of records belong the synchronized Merkle tree nodes have

Maximum of the number of records belong the synchronized Merkle tree nodes have

Minimum of the number of records belong the synchronized Merkle tree nodes have

Number of the synchronized Merkle tree nodes

Number of synchronized partitions

Number of partitions to synchronize

Number of synchronized records

Duration of the last synchronization

Standard deviation of the number of records belong the synchronized Merkle tree nodes have

Start time of this WAN synchronization

Total latency of published WAN events from this member

Total number of published WAN events from this member

Number of entry update events