Metrics reference

This page contains all Performance Analyzer metrics. All metrics support the avg, sum, min, and max aggregations, although certain metrics measure only one thing, making the choice of aggregation irrelevant.

For information on dimensions, see the dimensions reference.

This list is extensive. We recommend Ctrl + F to find what you’re looking for.

Metric Dimensions Description
CPU_Utilization ShardID, IndexName, Operation, ShardRole CPU usage ratio. CPU time (in milliseconds) used by the associated thread(s) in the past five seconds, divided by 5000 milliseconds.
Paging_MajfltRate The number of major faults per second in the past five seconds. A major fault requires the process to load a memory page from disk.
Paging_MinfltRate The number of minor faults per second in the past five seconds. A minor fault does not requires the process to load a memory page from disk.
Paging_RSS The number of pages the process has in real memory---the pages that count towards text, data, or stack space. This number does not include pages that have not been demand-loaded in or swapped out.
Sched_Runtime Time (seconds) spent executing on the CPU per context switch.
Sched_Waittime Time (seconds) spent waiting on a run queue per context switch.
Sched_CtxRate Number of times run on the CPU per second in the past five seconds.
Heap_AllocRate An approximation of the heap memory allocated, in bytes, per second in the past five seconds
IO_ReadThroughput Number of bytes read per second in the last five seconds.
IO_WriteThroughput Number of bytes written per second in the last five seconds.
IO_TotThroughput Number of bytes read or written per second in the last five seconds.
IO_ReadSyscallRate Read system calls per second in the last five seconds.
IO_WriteSyscallRate Write system calls per second in the last five seconds.
IO_TotalSyscallRate Read and write system calls per second in the last five seconds.
Thread_Blocked_Time Average time (seconds) that the associated thread(s) blocked to enter or reenter a monitor.
Thread_Blocked_Event The total number of times that the associated thread(s) blocked to enter or reenter a monitor (i.e. the number of times a thread has been in the blocked state).
ShardEvents The total number of events executed on a shard in the past five seconds.
ShardBulkDocs The total number of documents indexed in the past five seconds.
Indexing_ThrottleTime ShardID, IndexName Time (milliseconds) that the index has been under merge throttling control in the past five seconds.
Cache_Query_Hit The number of successful lookups in the query cache in the past five seconds.
Cache_Query_Miss The number of lookups in the query cache that failed to retrieve a `DocIdSet` in the past five seconds. `DocIdSet` is a set of document IDs in Lucene.
Cache_Query_Size Query cache memory size in bytes.
Cache_FieldData_Eviction The number of times Elasticsearch has evicted data from the fielddata heap space (occurs when the heap space is full) in the past five seconds.
Cache_FieldData_Size Fielddata memory size in bytes.
Cache_Request_Hit The number of successful lookups in the shard request cache in the past five seconds.
Cache_Request_Miss The number of lookups in the request cache that failed to retrieve the results of search requests in the past five seconds.
Cache_Request_Eviction The number of times Elasticsearch evicts data from shard request cache (occurs when the request cache is full) in the past five seconds.
Cache_Request_Size Shard request cache memory size in bytes.
Refresh_Event The total number of refreshes executed in the past five seconds.
Refresh_Time The total time (milliseconds) spent executing refreshes in the past five seconds
Flush_Event The total number of flushes executed in the past five seconds.
Flush_Time The total time (milliseconds) spent executing flushes in the past five seconds.
Merge_Event The total number of merges executed in the past five seconds.
Merge_Time The total time (milliseconds) spent executing merges in the past five seconds.
Merge_CurrentEvent The current number of merges executing.
Indexing_Buffer Index buffer memory size in bytes.
Segments_Total The number of segments.
Segments_Memory Estimated memory usage of segments in bytes.
Terms_Memory Estimated memory usage of terms dictionaries in bytes.
StoredFields_Memory Estimated memory usage of stored fields in bytes.
TermVectors_Memory Estimated memory usage of term vectors in bytes.
Norms_Memory Estimated memory usage of norms (normalization factors) in bytes.
Points_Memory Estimated memory usage of points in bytes.
DocValues_Memory Estimated memory usage of doc values in bytes.
IndexWriter_Memory Estimated memory usage by the index writer in bytes.
Bitset_Memory Estimated memory usage for the cached bit sets in bytes.
VersionMap_Memory Estimated memory usage of the version map in bytes.
Latency Operation, Exception, Indices, HTTPRespCode, ShardID, IndexName, ShardRole Latency (milliseconds) of a request.
GC_Collection_Event MemType The number of garbage collections that have occurred in the past five seconds.
GC_Collection_Time The approximate accumulated time (milliseconds) of all garbage collections that have occurred in the past five seconds.
Heap_Committed The amount of memory (bytes) that is committed for the JVM to use.
Heap_Init The amount of memory (bytes) that the JVM initially requests from the operating system for memory management.
Heap_Max The maximum amount of memory (bytes) that can be used for memory management.
Heap_Used The amount of used memory in bytes.
Disk_Utilization DiskName Disk utilization rate: percentage of disk time spent reading and writing by the Elasticsearch process in the past five seconds.
Disk_WaitTime Average duration (milliseconds) of read and write operations in the past five seconds.
Disk_ServiceRate Service rate: MB read or written per second in the past five seconds. This metric assumes that each disk sector stores 512 bytes.
Net_TCP_NumFlows DestAddr Number of samples collected. Performance Analyzer collects one sample every five seconds.
Net_TCP_TxQ Average number of TCP packets in the send buffer.
Net_TCP_RxQ Average number of TCP packets in the receive buffer.
Net_TCP_Lost Average number of unrecovered recurring timeouts. This number is reset when the recovery finishes or `SND.UNA` is advanced. `SND.UNA` is the sequence number of the first byte of data that has been sent, but not yet acknowledged.
Net_TCP_SendCWND Average size (bytes) of the sending congestion window.
Net_TCP_SSThresh Average size (bytes) of the slow start size threshold.
Net_PacketRate4 Direction The total number of IPv4 datagrams transmitted/received from/by interfaces per second, including those transmitted or received in error
Net_PacketDropRate4 The total number of IPv4 datagrams transmitted or received in error per second.
Net_PacketRate6 The total number of IPv6 datagrams transmitted or received from or by interfaces per second, including those transmitted or received in error.
Net_PacketDropRate6 The total number of IPv6 datagrams transmitted or received in error per second.
Net_Throughput The number of bytes of data transmitted or received per second by all network interfaces.
ThreadPool_QueueSize ThreadPoolType The size of the task queue.
ThreadPool_RejectedReqs The number of rejected executions.
ThreadPool_TotalThreads The current number of threads in the pool.
ThreadPool_ActiveThreads The approximate number of threads that are actively executing tasks.
Master_PendingQueueSize N/A The current number of pending tasks in the cluster state update thread. Each node has a cluster state update thread that submits cluster state update tasks (create index, update mapping, allocate shard, fail shard, etc.).
HTTP_RequestDocs Operation, Exception, Indices, HTTPRespCode The number of items in the request (only for `_bulk` request type).
HTTP_TotalRequests The number of finished requests in the past five seconds.
CB_EstimatedSize CBType The current number of estimated bytes.
CB_TrippedEvents The number of times the circuit breaker has tripped.
CB_ConfiguredSize The limit (bytes) for how much memory operations can use.
Master_Task_Queue_Time MasterTaskInsertOrder, MasterTaskPriority, MasterTaskType, MasterTaskMetadata The time (milliseconds) that a master task spent in the queue.
Master_Task_Run_Time The time (milliseconds) that a master task has been executed.

Dimensions reference

Dimension Return values
ShardID ID for the shard (e.g. 1).
IndexName Name of the index (e.g. my-index).
Operation Type of operation (e.g. shardbulk).
ShardRole primary, replica
Exception Elasticsearch exceptions (e.g. org.elasticsearch.index_not_found_exception).
Indices The list of indices in the request URI.
HTTPRespCode Response code from Elasticsearch (e.g. 200).
MemType totYoungGC, totFullGC, Survivor, PermGen, OldGen, Eden, NonHeap, Heap
DiskName Name of the disk (e.g. sda1).
DestAddr Destination address (e.g. 010015AC).
Direction in, out
ThreadPoolType The Elasticsearch thread pools (e.g. index, search,snapshot).
CBType accounting, fielddata, in_flight_requests, parent, request
MasterTaskInsertOrder The order in which the task was inserted (e.g. 3691).
MasterTaskPriority Priority of the task (e.g. URGENT). Elasticsearch executes higher priority tasks before lower priority ones, regardless of insert_order.
MasterTaskType shard-started, create-index, delete-index, refresh-mapping, put-mapping, CleanupSnapshotRestoreState, Update snapshot state
MasterTaskMetadata Metadata for the task (if any).