Milvus integration metrics

The official Datadog integration for monitoring Milvus. It collects 386 metrics.

Definitions as of 2026-08-05

Official summary

Monitor the performance and usage of your Milvus deployments.

Metric types

count (occurrences in the interval): 298
gauge (value at a point in time): 88

Metrics

Descriptions are the official definitions, unedited.

Metric	Type	Unit
`milvus.bf_search_cnt.bucket`Histogram bucket for the number of brute-force searches per request	count	-
`milvus.bf_search_cnt.count`Count aggregation of brute-force searches per request	count	-
`milvus.bf_search_cnt.sum`Sum aggregation of brute-force searches per request	count	-
`milvus.bitset_ratio.bucket`Bitset ratio histogram bucket	count	-
`milvus.bitset_ratio.count`Count of bitset ratio calculations	count	-
`milvus.bitset_ratio.sum`Sum of bitset ratios	count	-
`milvus.build_info`Build information of milvus	gauge	-
`milvus.build_latency.bucket`Index build latency histogram bucket	count	-
`milvus.build_latency.count`Count of index builds	count	-
`milvus.build_latency.sum`Sum of index build latencies(s)	count	second
`milvus.cache_hit_cnt.bucket`Histogram bucket for the cache hit count per request	count	-
`milvus.cache_hit_cnt.count`Count aggregation of cache hit count per request	count	-
`milvus.cache_hit_cnt.sum`Sum aggregation of cache hit count per request	count	-
`milvus.cgo.active_future_total`Total number of active futures.	gauge	-
`milvus.cgo.cgo_duration_seconds.bucket`Histogram bucket of cgo call duration in seconds	count	-
`milvus.cgo.cgo_duration_seconds.count`Count of cgo calls	count	-
`milvus.cgo.cgo_duration_seconds.sum`Sum of cgo call duration in seconds.	count	second
`milvus.cgo.cgo_queue_duration_seconds.bucket`Histogram bucket for the duration of cgo calls in queue	count	-
`milvus.cgo.cgo_queue_duration_seconds.count`Counnt of cgo calls in queue	count	-
`milvus.cgo.cgo_queue_duration_seconds.sum`Sum of the duration of cgo calls in queue	count	second
`milvus.cgo.running_cgo_call_total`Total number of running cgo calls.	gauge	-
`milvus.datacoord.channel_checkpoint_unix_seconds`Channel checkpoint timestamp in Unix seconds	gauge	-
`milvus.datacoord.collection_num`Number of collections	gauge	-
`milvus.datacoord.consume_datanode_tt_lag_ms`Now time minus time travel per physical channel	gauge	millisecond
`milvus.datacoord.datanode_num`Number of data nodes	gauge	-
`milvus.datacoord.import_tasks`The import tasks grouping by type and state	gauge	-
`milvus.datacoord.index.node_num`Number of IndexNodes managed by IndexCoord	gauge	-
`milvus.datacoord.index.req.count`Number of building index requests	count	-
`milvus.datacoord.index.task`Number of index tasks of each type	gauge	-
`milvus.datacoord.segment_num`Number of segments	gauge	-
`milvus.datacoord.stored.binlog_size`Binlog size of healthy segments	gauge	byte
`milvus.datacoord.stored.index_files_size`Index files size of the segments	gauge	byte
`milvus.datacoord.stored.rows_num`Number of stored rows of healthy segment	gauge	-
`milvus.datacoord.task_execute_max_latency.bucket`Histogram bucket for the latency of task execute operation	count	-
`milvus.datacoord.task_execute_max_latency.count`Count of task execute operations	count	-
`milvus.datacoord.task_execute_max_latency.sum`Sum of the latency of task execute operations	count	millisecond
`milvus.datacoord.watched_dml_chanel_num`The num of data manipulation language channel watched by datanode	gauge	-
`milvus.datanode.autoflush_buffer_op.count`Count of auto flush buffer operations	count	-
`milvus.datanode.consume.bytes.count`Count of consumed bytes	count	-
`milvus.datanode.consume.msg.count`Count of consumed msg	count	-
`milvus.datanode.consume.tt_lag_ms`Now time minus time travel per physical channel	gauge	millisecond
`milvus.datanode.encode_buffer_latency.bucket`Histogram bucket for the latency of encode buffer data	count	-
`milvus.datanode.encode_buffer_latency.count`Count of encode buffer data operations	count	-
`milvus.datanode.encode_buffer_latency.sum`Sum of the latency of encode buffer data operations	count	millisecond
`milvus.datanode.flowgraph_num`Number of flowgraphs	gauge	-
`milvus.datanode.flush.buffer_op.count`Count of flush buffer operations	count	-
`milvus.datanode.flush.req.count`Count of flush request	count	-
`milvus.datanode.flushed_data.rows.count`Num of rows flushed to storage	count	-
`milvus.datanode.flushed_data.size.count`Byte size of data flushed to storage	count	byte
`milvus.datanode.msg.dispatcher_tt_lag_ms`time.Now() sub dispatcher's current consume time	gauge	millisecond
`milvus.datanode.msg.rows.count`Count of rows consumed from msgStream	count	-
`milvus.datanode.save_latency.bucket`Histogram bucket for the latency of saving flush data to storage	count	-
`milvus.datanode.save_latency.count`Count of saving flush data to storage events	count	-
`milvus.datanode.save_latency.sum`Sum of the latency of saving flush data to storage events	count	millisecond
`milvus.diskann.range_search_iters.bucket`Histogram bucket for DISKANN range search iterations	count	-
`milvus.diskann.range_search_iters.count`Count of DISKANN range search events	count	-
`milvus.diskann.range_search_iters.sum`Sum of DISKANN range search iterations	count	-
`milvus.diskann.search_hops.bucket`Histogram for DISKANN search hops	count	-
`milvus.diskann.search_hops.count`Count of DISKANN search hop events	count	-
`milvus.diskann.search_hops.sum`Sum of DISKANN search hops	count	-
`milvus.diskann_bitset_ratio.bucket`Histogram bucket for the DISKANN bitset ratio for search and range search	count	-
`milvus.diskann_bitset_ratio.count`Count of the DISKANN bitset ratio operations for search and range search	count	-
`milvus.diskann_bitset_ratio.sum`Sum of the DISKANN bitset ratio for search and range search	count	-
`milvus.exec_latency.bucket`Histogram bucket for the execute latency per request	count	-
`milvus.exec_latency.count`Count aggregation of the execute latency per request	count	-
`milvus.exec_latency.sum`Sum aggregation of the execute latency per request	count	-
`milvus.filter.connectivity_ratio.bucket`Histogram bucket for the average connectivity ratio set under filtering per request	count	-
`milvus.filter.connectivity_ratio.count`Count of the connectivity ratios set under filtering per request	count	-
`milvus.filter.connectivity_ratio.sum`Sum of the average connectivity ratios set under filtering per request	count	-
`milvus.filter.mv.activated_fields_cnt.bucket`Histogram bucket of the average materialized view activated fields per request	count	-
`milvus.filter.mv.activated_fields_cnt.count`Count of the requests activating materialized view fields	count	-
`milvus.filter.mv.activated_fields_cnt.sum`Sum of the average materialized view activated fields per request	count	-
`milvus.filter.mv.change_base_cnt.bucket`Histogram bucket for the materialized view change base count per request	count	-
`milvus.filter.mv.change_base_cnt.count`Count of requests triggering materialized view change base events	count	-
`milvus.filter.mv.change_base_cnt.sum`Sum of materialized view change base counts per request	count	-
`milvus.filter.mv.only_cnt.bucket`Histogram bucket for the materialized view only count per request	count	-
`milvus.filter.mv.only_cnt.count`Count of requests that trigger materialized view only events	count	-
`milvus.filter.mv.only_cnt.sum`Sum of materialized view only counts	count	-
`milvus.filter.mv.supplement_ep_bool_cnt.bucket`Histogram bucket for materialized view supplement entry point from bitset boolean count per request	count	-
`milvus.filter.mv.supplement_ep_bool_cnt.count`Count of requests triggering a materialized view supplement entry point from bitset boolean event	count	-
`milvus.filter.mv.supplement_ep_bool_cnt.sum`Sum of materialized view supplement entry point from bitset boolean events	count	-
`milvus.flushed_segment_file_num.bucket`Histogram bucket for the number of files for flushed segment	count	-
`milvus.flushed_segment_file_num.count`Count of flushed segment events	count	-
`milvus.flushed_segment_file_num.sum`Sum of the number of files for flushed segments	count	-
`milvus.go.gc_duration_seconds.count`A summary of the pause duration of garbage collection cycles.	count	-
`milvus.go.gc_duration_seconds.quantile`A summary of the pause duration of garbage collection cycles.	gauge	-
`milvus.go.gc_duration_seconds.sum`A summary of the pause duration of garbage collection cycles.	count	-
`milvus.go.goroutines`Number of goroutines that currently exist.	gauge	-
`milvus.go.info`Information about the Go environment.	gauge	-
`milvus.go.memstats.alloc_bytes`Number of bytes allocated and still in use.	gauge	-
`milvus.go.memstats.alloc_bytes.count`Total number of bytes allocated, even if freed.	count	-
`milvus.go.memstats.buck_hash_sys_bytes`Number of bytes used by the profiling bucket hash table.	gauge	-
`milvus.go.memstats.frees.count`Total number of frees.	count	-
`milvus.go.memstats.gc_sys_bytes`Number of bytes used for garbage collection system metadata.	gauge	-
`milvus.go.memstats.heap.alloc_bytes`Number of heap bytes allocated and still in use.	gauge	-
`milvus.go.memstats.heap.idle_bytes`Number of heap bytes waiting to be used.	gauge	-
`milvus.go.memstats.heap.inuse_bytes`Number of heap bytes that are in use.	gauge	-
`milvus.go.memstats.heap.objects`Number of allocated objects.	gauge	-
`milvus.go.memstats.heap.released_bytes`Number of heap bytes released to OS.	gauge	-
`milvus.go.memstats.heap.sys_bytes`Number of heap bytes obtained from system.	gauge	-
`milvus.go.memstats.last_gc_time_seconds`Number of seconds since 1970 of last garbage collection.	gauge	-
`milvus.go.memstats.lookups.count`Total number of pointer lookups.	count	-
`milvus.go.memstats.mallocs.count`Total number of mallocs.	count	-
`milvus.go.memstats.mcache.inuse_bytes`Number of bytes in use by mcache structures.	gauge	-
`milvus.go.memstats.mcache.sys_bytes`Number of bytes used for mcache structures obtained from system.	gauge	-
`milvus.go.memstats.mspan.inuse_bytes`Number of bytes in use by mspan structures.	gauge	-
`milvus.go.memstats.mspan.sys_bytes`Number of bytes used for mspan structures obtained from system.	gauge	-
`milvus.go.memstats.next_gc_bytes`Number of heap bytes when next garbage collection will take place.	gauge	-
`milvus.go.memstats.other_sys_bytes`Number of bytes used for other system allocations.	gauge	-
`milvus.go.memstats.stack.inuse_bytes`Number of bytes in use by the stack allocator.	gauge	-
`milvus.go.memstats.stack.sys_bytes`Number of bytes obtained from system for stack allocator.	gauge	-
`milvus.go.memstats.sys_bytes`Number of bytes obtained from system.	gauge	-
`milvus.go.threads`Number of OS threads created.	gauge	-
`milvus.graph_search_cnt.bucket`Histogram bucket for the number of graph search per request	count	-
`milvus.graph_search_cnt.count`Count of requests that trigger a graph search	count	-
`milvus.graph_search_cnt.sum`Sum of graph searches	count	-
`milvus.hnsw.bitset_ratio.bucket`Histogram bucket of the HNSW bitset ratio for search and range search	count	-
`milvus.hnsw.bitset_ratio.count`Count aggregation of the HNSW bitset ratio for search and range search	count	-
`milvus.hnsw.bitset_ratio.sum`Sum aggregation of the HNSW bitset ratio for search and range search	count	-
`milvus.hnsw.search_hops.bucket`Histogram bucket of the HNSW search hops in layer 0	count	-
`milvus.hnsw.search_hops.count`Count aggregation of the HNSW search hops in layer 0	count	-
`milvus.hnsw.search_hops.sum`Sum aggregation of the HNSW search hops in layer 0	count	-
`milvus.indexnode.build_index_latency.bucket`Histogram bucket of the latency of build index for segment	count	-
`milvus.indexnode.build_index_latency.count`Count of build index events	count	-
`milvus.indexnode.build_index_latency.sum`Sum of the latency of build index events	count	millisecond
`milvus.indexnode.encode_index_latency.bucket`Histogram bucket of the latency of encoding the index file	count	-
`milvus.indexnode.encode_index_latency.count`Count of the index file encoding events	count	-
`milvus.indexnode.encode_index_latency.sum`Sum of the latency of index file encoding events	count	millisecond
`milvus.indexnode.index.task.count`Number of tasks that index node received	count	-
`milvus.indexnode.index.task_latency_in_queue.bucket`Histogram bucket for the latency of index task in queue	count	-
`milvus.indexnode.index.task_latency_in_queue.count`Count of index task in queue	count	-
`milvus.indexnode.index.task_latency_in_queue.sum`Sum of the latency of index task in queue	count	millisecond
`milvus.indexnode.knowhere_build_index_latency.bucket`Histogram bucket for the latency of building the index by knowhere	count	-
`milvus.indexnode.knowhere_build_index_latency.count`Count of index builds by knowhere	count	-
`milvus.indexnode.knowhere_build_index_latency.sum`Sum of the latency of building the index by knowhere	count	millisecond
`milvus.indexnode.save_index_latency.bucket`Histogram bucket for the latency of saving the index file	count	-
`milvus.indexnode.save_index_latency.count`Count of index file save envents	count	-
`milvus.indexnode.save_index_latency.sum`Sum of the latency of saving the index file	count	millisecond
`milvus.internal.core_search_latency.bucket`Histogram bucket for the [cpp]latency(us) of search on segment	count	-
`milvus.internal.core_search_latency.count`Count aggregation of [cpp]latency(us) of search on segment	count	-
`milvus.internal.core_search_latency.sum`Sum aggregation of [cpp]latency(us) of search on segment	count	microsecond
`milvus.internal.mmap.allocated_space_bytes.bucket`Histogram bucket for the [cpp]mmap allocated space stats	count	-
`milvus.internal.mmap.allocated_space_bytes.count`Count aggregation of [cpp]mmap allocated space stats	count	-
`milvus.internal.mmap.allocated_space_bytes.sum`Sum aggregation of [cpp]mmap allocated space stats	count	-
`milvus.internal.mmap.in_used_space_bytes`[cpp]mmap in used space stats	gauge	-
`milvus.internal.storage.kv_size.bucket`Histogram bucket for the [cpp]key-value size stats	count	-
`milvus.internal.storage.kv_size.count`Count aggregation of [cpp]key-value size stats	count	-
`milvus.internal.storage.kv_size.sum`Sum aggregation of [cpp]key-value size stats	count	-
`milvus.internal.storage.load_duration.bucket`Histogram bucket for the [cpp]durations of load segment	count	-
`milvus.internal.storage.load_duration.count`Count aggregation of [cpp]durations of load segment	count	-
`milvus.internal.storage.load_duration.sum`Sum aggregation of [cpp]durations of load segment	count	-
`milvus.internal.storage.op.count`[cpp]count of persistent data operation	count	-
`milvus.internal.storage.request_latency.bucket`Histogram bucket for the [cpp]request latency(ms) on the client side	count	-
`milvus.internal.storage.request_latency.count`Count aggregation of [cpp]request latency(ms) on the client side	count	-
`milvus.internal.storage.request_latency.sum`Sum aggregation of [cpp]request latency(ms) on the client side	count	millisecond
`milvus.io_cnt.bucket`Histogram bucket for the IO count per request	count	-
`milvus.io_cnt.count`Count of requests triggering IO operations	count	-
`milvus.io_cnt.sum`Sum of IO operation counts	count	-
`milvus.ivf_search_cnt.bucket`Histogram bucket for the number of inverted file search per request	count	-
`milvus.ivf_search_cnt.count`Count of requests trigerring an inverted file search	count	-
`milvus.ivf_search_cnt.sum`Sum of inverted file searches	count	-
`milvus.load_latency.bucket`Histogram bucket for the index load latency (ms)	count	-
`milvus.load_latency.count`Count of index load events	count	-
`milvus.load_latency.sum`Sum of index load latency (ms)	count	millisecond
`milvus.meta.kv_size.bucket`Histogram for the key-value size stats	count	-
`milvus.meta.kv_size.count`Count aggregation of the key-value size stats	count	-
`milvus.meta.kv_size.sum`Sum aggregation of the key-value size stats	count	-
`milvus.meta.op.count`Count of meta operation	count	-
`milvus.meta.request_latency.bucket`Histogram bucket for the request latency on the client side	count	-
`milvus.meta.request_latency.count`Count aggregation of the request latency on the client side	count	-
`milvus.meta.request_latency.sum`Sum aggregation of the request latency on the client side	count	millisecond
`milvus.msg_queue_consumer_num`Number of consumers	gauge	-
`milvus.msgstream.op.count`Count of stream message operation	count	-
`milvus.msgstream.request_latency.bucket`Histogram bucket for the request latency on the client side	count	-
`milvus.msgstream.request_latency.count`Count aggregation of the request latency on the client side	count	-
`milvus.msgstream.request_latency.sum`Sum aggregation of the request latency on the client side	count	millisecond
`milvus.num_node`Number of nodes and coordinates	gauge	-
`milvus.process.cpu_seconds.count`Total user and system CPU time spent in seconds.	count	-
`milvus.process.max_fds`Maximum number of open file descriptors.	gauge	-
`milvus.process.open_fds`Number of open file descriptors.	gauge	-
`milvus.process.resident_memory_bytes`Resident memory size in bytes.	gauge	-
`milvus.process.start_time_seconds`Start time of the process since Unix epoch in seconds.	gauge	-
`milvus.process.virtual_memory.bytes`Virtual memory size in bytes.	gauge	-
`milvus.process.virtual_memory.max_bytes`Maximum amount of virtual memory available in bytes.	gauge	-
`milvus.proxy.apply.pk_latency.bucket`Histogram bucket for the latency of 'apply primary key' events	count	-
`milvus.proxy.apply.pk_latency.count`Count of 'apply primary key' events	count	-
`milvus.proxy.apply.pk_latency.sum`Sum of latencies for 'apply primary key' events	count	millisecond
`milvus.proxy.apply.timestamp_latency.bucket`Histogram bucket for the latency of proxy 'apply timestamp' events	count	-
`milvus.proxy.apply.timestamp_latency.count`Count of proxy 'apply timestamp' events	count	-
`milvus.proxy.apply.timestamp_latency.sum`Sum of latencies of proxy 'apply timestamp' events	count	millisecond
`milvus.proxy.assign_segmentID_latency.bucket`Histogram bucket for the latency of proxy 'get segmentID from dataCoord' events	count	-
`milvus.proxy.assign_segmentID_latency.count`Count of proxy 'get segmentID from dataCoord' events	count	-
`milvus.proxy.assign_segmentID_latency.sum`Sum of latencies for proxy 'get segmentID from dataCoord' events	count	millisecond
`milvus.proxy.cache.hit.count`Count of cache hits/miss	count	-
`milvus.proxy.cache.update_latency.bucket`Histogram bucket for the latency of proxy 'update cache when cache miss' events	count	-
`milvus.proxy.cache.update_latency.count`Count of proxy 'update cache when cache miss' events	count	-
`milvus.proxy.cache.update_latency.sum`Sum of latencies of proxy 'update cache when cache miss'	count	millisecond
`milvus.proxy.delete_vectors.count`Counter of vectors successfully deleted	count	-
`milvus.proxy.msgstream_obj_num`Number of MsgStream objects per physical channel	gauge	-
`milvus.proxy.mutation_send_latency.bucket`Histogram bucket for the latency of proxy 'send insert request to MsgStream' events	count	-
`milvus.proxy.mutation_send_latency.count`Count of proxy 'send insert request to MsgStream' events	count	-
`milvus.proxy.mutation_send_latency.sum`Sum of latencies of proxy 'send insert request to MsgStream' events	count	millisecond
`milvus.proxy.rate_limit_req.count`Count of operation executed	count	-
`milvus.proxy.report_value.count`Report value about the request	count	-
`milvus.proxy.req.count`Count of operation executed	count	-
`milvus.proxy.req.in_queue_latency.bucket`Histogram bucket for the time in queue of request	count	-
`milvus.proxy.req.in_queue_latency.count`Count of request in queue	count	-
`milvus.proxy.req.in_queue_latency.sum`Sum of the time requests spend in queue	count	millisecond
`milvus.proxy.req.latency.bucket`Histogram bucket for the latency of each request	count	-
`milvus.proxy.req.latency.count`Count of request latency events	count	-
`milvus.proxy.req.latency.sum`Sum of latencies of requests	count	millisecond
`milvus.proxy.send_bytes.count`Count of bytes sent back to sdk	count	-
`milvus.proxy.sq.decode_result_latency.bucket`Histogram bucket for the latency of proxy 'decode the search result' events	count	-
`milvus.proxy.sq.decode_result_latency.count`Count of proxy 'decode the search result' events	count	-
`milvus.proxy.sq.decode_result_latency.sum`Sum of latencies for proxy 'decode the search result' events	count	millisecond
`milvus.proxy.sq.reduce_result_latency.bucket`Histogram bucket for the latency of proxy 'reduces search result' events	count	-
`milvus.proxy.sq.reduce_result_latency.count`Count of proxy 'reduces search result' events	count	-
`milvus.proxy.sq.reduce_result_latency.sum`Sum of latencies for proxy 'reduces search result' events	count	millisecond
`milvus.proxy.sq.wait_result_latency.bucket`Histogram bucket for the latency of proxy 'waits for the result' events	count	-
`milvus.proxy.sq.wait_result_latency.count`Count of proxy 'waits for the result' events	count	-
`milvus.proxy.sq.wait_result_latency.sum`Sum of latencies for proxy 'waits for the result' events	count	millisecond
`milvus.proxy.sync_segment_request_length.bucket`Histogram bucket for the length of SegmentIDRequests when assigning segments for insert	count	-
`milvus.proxy.sync_segment_request_length.count`Count of assigning segments for insert events	count	-
`milvus.proxy.sync_segment_request_length.sum`Sum of the length of SegmentIDRequests when assigning segments for insert	count	-
`milvus.proxy.tt_lag_ms`Now time minus time travel per physical channel	gauge	millisecond
`milvus.quant.compute_cnt.bucket`Histogram bucket for the quant compute count per request	count	-
`milvus.quant.compute_cnt.count`Count of requests triggering quant compute events	count	-
`milvus.quant.compute_cnt.sum`Sum of quant compute event counts	count	-
`milvus.querycoord.collection_num`Number of collections	gauge	-
`milvus.querycoord.current_target_checkpoint_unix_seconds`Current target checkpoint timestamp in Unix seconds	gauge	-
`milvus.querycoord.load.latency.bucket`Histogram bucket Latency of load the entire collection	count	-
`milvus.querycoord.load.latency.count`Latency of load the entire collection	count	-
`milvus.querycoord.load.latency.sum`Latency of load the entire collection	count	millisecond
`milvus.querycoord.load.req.count`Count of load request	count	-
`milvus.querycoord.partition_num`Number of partitions	gauge	-
`milvus.querycoord.querynode_num`Number of QueryNodes managered by QueryCoord	gauge	-
`milvus.querycoord.release.latency.bucket`Histogram bucket for the latency of release request	count	-
`milvus.querycoord.release.latency.count`Count of release request events	count	-
`milvus.querycoord.release.latency.sum`Sum of the latencies of release request events	count	millisecond
`milvus.querycoord.release.req.count`Count of release request	count	-
`milvus.querycoord_task_num`the number of tasks in QueryCoord's scheduler	gauge	-
`milvus.querynode.apply_bf_latency.bucket`Histogram bucket for the apply brute-force cost in ms	count	-
`milvus.querynode.apply_bf_latency.count`Count of apply brute-force events	count	-
`milvus.querynode.apply_bf_latency.sum`Sum of the apply brute-force cost in ms	count	millisecond
`milvus.querynode.collection_num`Number of collections loaded	gauge	-
`milvus.querynode.consume.bytes_counter.count`Count of consumed bytes	count	-
`milvus.querynode.consume.msg.count`Count of consumed msg	count	-
`milvus.querynode.consume.tt_lag_ms`Now time minus time travel per physical channel	gauge	millisecond
`milvus.querynode.disk.cache.evict.bytes.count`Number of bytes evicted from disk cache	count	byte
`milvus.querynode.disk.cache.evict.count`Number of segments evicted from disk cache	count	-
`milvus.querynode.disk.cache.evict.duration.count`Total time cost of evicting segments from disk cache	count	-
`milvus.querynode.disk.cache.evict.global_duration.bucket`Histogram bucket for the global duration of evicting segments from disk cache	count	-
`milvus.querynode.disk.cache.evict.global_duration.count`Count of evicting segments from disk cache events	count	-
`milvus.querynode.disk.cache.evict.global_duration.sum`Sum of the global duration of evicting segments from disk cache	count	millisecond
`milvus.querynode.disk.cache.load.bytes.count`Number of bytes loaded from disk cache	count	byte
`milvus.querynode.disk.cache.load.count`Number of segments loaded from disk cache	count	-
`milvus.querynode.disk.cache.load.duration.count`Total time cost of loading segments from disk cache	count	-
`milvus.querynode.disk.cache.load.global_duration.bucket`Histogram bucket for the global duration of loading segments from disk cache	count	-
`milvus.querynode.disk.cache.load.global_duration.count`Count of loading segments from disk cache events	count	-
`milvus.querynode.disk.cache.load.global_duration.sum`Sum of the global duration of loading segments from disk cache	count	millisecond
`milvus.querynode.disk.used_size`Disk used size(MB)	gauge	mebibyte
`milvus.querynode.dml_vchannel_num`Number of data manipulation language channels watched	gauge	-
`milvus.querynode.entity.num`Number of entities which can be searched/queried, clustered by collection, partition and state	gauge	-
`milvus.querynode.entity.size`Entities' memory size, clustered by collection and state	gauge	byte
`milvus.querynode.execute_bytes_counter.count`Count of execute bytes	count	-
`milvus.querynode.flowgraph_num`Number of flowgraphs	gauge	-
`milvus.querynode.forward_delete_latency.bucket`Histogram bucket for the forward delete cost in ms	count	-
`milvus.querynode.forward_delete_latency.count`Count of forward delete events	count	-
`milvus.querynode.forward_delete_latency.sum`Sum of the forward delete cost in ms	count	millisecond
`milvus.querynode.load.index_latency.bucket`Histogram bucket for the latency of load per segment's index, in milliseconds	count	-
`milvus.querynode.load.index_latency.count`Count of load per segment's index events	count	-
`milvus.querynode.load.index_latency.sum`Sum of the latencies of load per segment's index events, in milliseconds	count	millisecond
`milvus.querynode.load.segment.concurrency`Number of concurrent loading segments in QueryNode	gauge	-
`milvus.querynode.load.segment.latency.bucket`Histogram bucket for the latency of load per segment	count	-
`milvus.querynode.load.segment.latency.count`Count of load per segment events	count	-
`milvus.querynode.load.segment.latency.sum`Sum of the latencies of load per segment events	count	millisecond
`milvus.querynode.msg_dispatcher_tt_lag_ms`time.Now() sub dispatcher's current consume time	gauge	millisecond
`milvus.querynode.partition_num`Number of partitions loaded	gauge	-
`milvus.querynode.process_insert_or_delete_latency.bucket`Histogram bucket for the process insert or delete cost in ms	count	-
`milvus.querynode.process_insert_or_delete_latency.count`Count of process insert or delete events	count	-
`milvus.querynode.process_insert_or_delete_latency.sum`Sum of process insert or delete cost in ms	count	millisecond
`milvus.querynode.read_task.concurrency`Number of concurrent executing read tasks in QueryNode	gauge	-
`milvus.querynode.read_task.ready_len`Number of ready read tasks in readyQueue	gauge	-
`milvus.querynode.read_task.unsolved_len`Number of unsolved read tasks in unsolvedQueue	gauge	-
`milvus.querynode.search.group.nq.bucket`Histogram bucket for the number of queries of each grouped search task	count	-
`milvus.querynode.search.group.nq.count`Count of grouped search tasks	count	-
`milvus.querynode.search.group.nq.sum`Sum of the number of queries of grouped search tasks	count	-
`milvus.querynode.search.group.size.bucket`Histogram bucket for the number of tasks of each grouped search task	count	-
`milvus.querynode.search.group.size.count`Count of grouped search tasks	count	-
`milvus.querynode.search.group.size.sum`Sum of the number of tasks of grouped search tasks	count	-
`milvus.querynode.search.group.topk.bucket`Histogram bucket for the topK of each grouped search task	count	-
`milvus.querynode.search.group.topk.count`Count of grouped search tasks	count	-
`milvus.querynode.search.group.topk.sum`Sum of the topK of grouped search tasks	count	-
`milvus.querynode.search.nq.bucket`Histogram bucket for the number of queries of each search task	count	-
`milvus.querynode.search.nq.count`Count of search tasks	count	-
`milvus.querynode.search.nq.sum`Sum of the number of queries of search tasks	count	-
`milvus.querynode.search.topk.bucket`Histogram bucket for the top of each search task	count	-
`milvus.querynode.search.topk.count`Count of search tasks	count	-
`milvus.querynode.search.topk.sum`Sum of the top of search tasks	count	-
`milvus.querynode.segment.access.count`Number of segments accessed	count	-
`milvus.querynode.segment.access.duration.count`Total time cost of accessing segments	count	-
`milvus.querynode.segment.access.global_duration.bucket`Histogram bucket for the global time cost of accessing segments	count	-
`milvus.querynode.segment.access.global_duration.count`Count of accessing segments events	count	-
`milvus.querynode.segment.access.global_duration.sum`Sum of the global time cost of accessing segments	count	millisecond
`milvus.querynode.segment.access.wait_cache.count`Number of segments waiting for loading access	count	-
`milvus.querynode.segment.access.wait_cache.duration.count`Total time cost of waiting for loading access	count	-
`milvus.querynode.segment.access.wait_cache.global_duration.bucket`Histogram bucket for the global time cost of waiting for loading access	count	-
`milvus.querynode.segment.access.wait_cache.global_duration.count`Count of waiting for loading access events	count	-
`milvus.querynode.segment.access.wait_cache.global_duration.sum`Sum of the global time cost of waiting for loading access events	count	millisecond
`milvus.querynode.segment.latency_per_vector.bucket`Histogram bucket for one vector's search latency per segment	count	-
`milvus.querynode.segment.latency_per_vector.count`Count aggregation of one vector's search latency per segment	count	-
`milvus.querynode.segment.latency_per_vector.sum`Sum aggregation of one vector's search latency per segment	count	millisecond
`milvus.querynode.segment.num`Number of segments loaded, clustered by its collection, partition, state and # of indexed fields	gauge	-
`milvus.querynode.sq.core_latency.bucket`Histogram bucket for the latency of searches or queries in segcore	count	-
`milvus.querynode.sq.core_latency.count`Count of search or query events in segcore	count	-
`milvus.querynode.sq.core_latency.sum`Sum of latencies of searches or queries in segcore	count	millisecond
`milvus.querynode.sq.queue.latency.bucket`Histogram bucket for the latency of searches or queries in queue	count	-
`milvus.querynode.sq.queue.latency.count`Count of search or query events	count	-
`milvus.querynode.sq.queue.latency.sum`Sum of latencies of searches or queries in queue	count	millisecond
`milvus.querynode.sq.queue.user_latency.bucket`Histgram bucket for the latency per user of search or query in queue	count	-
`milvus.querynode.sq.queue.user_latency.count`Count of search or query in queue	count	-
`milvus.querynode.sq.queue.user_latency.sum`Sum of latencies per user of search or query in queue	count	millisecond
`milvus.querynode.sq.reduce_latency.bucket`Histogram bucket for the latencies of reduce search or query result	count	-
`milvus.querynode.sq.reduce_latency.count`Count of reduce search or query result events	count	-
`milvus.querynode.sq.reduce_latency.sum`Sum of latencies of reduce search or query result	count	millisecond
`milvus.querynode.sq.req.count`count of search / query request	count	-
`milvus.querynode.sq.req.latency.bucket`Histogram bucket for the latency of search or query requests	count	-
`milvus.querynode.sq.req.latency.count`Count of search or query requests	count	-
`milvus.querynode.sq.req.latency.sum`Sum of latencies of search or query requests	count	millisecond
`milvus.querynode.sq.segment_latency.bucket`Histogram bucket for the latency of search or query per segment	count	-
`milvus.querynode.sq.segment_latency.count`Count of search or query per segment	count	-
`milvus.querynode.sq.segment_latency.sum`Sum of latencies of search or query per segment	count	millisecond
`milvus.querynode.sq.wait_tsafe_latency.bucket`Histogram bucket for the time that search or query waits for tsafe	count	-
`milvus.querynode.sq.wait_tsafe_latency.count`Count of occurrences of search or query waiting for tsafe	count	-
`milvus.querynode.sq.wait_tsafe_latency.sum`Sum of the time that search or query wait for tsafe	count	millisecond
`milvus.querynode.wait_processing_msg`Count of wait processing msg	gauge	-
`milvus.querynode.watch_dml_channel_latency.bucket`Histogram bucket for the latencies of watch data manipulation language channel	count	-
`milvus.querynode.watch_dml_channel_latency.count`Count of watch data manipulation language channel events	count	-
`milvus.querynode.watch_dml_channel_latency.sum`Sum of the latencies of watch data manipulation language channel events	count	millisecond
`milvus.queue.latency.bucket`Histogram bucket for the queue latency per request	count	-
`milvus.queue.latency.count`Count of request with queue latency	count	-
`milvus.queue.latency.sum`Sum of queue latencies	count	-
`milvus.range_search_latency.bucket`Histogram bucket for range search latency (ms)	count	-
`milvus.range_search_latency.count`Count of range search operations	count	-
`milvus.range_search_latency.sum`Sum of range search latencies (ms)	count	millisecond
`milvus.raw_compute_cnt.bucket`Histogram bucket for the raw compute count per request	count	-
`milvus.raw_compute_cnt.count`Count of request that trigger raw compute operations	count	-
`milvus.raw_compute_cnt.sum`Sum of raw compute operations	count	-
`milvus.re_search_cnt.bucket`Histogram bucket for the number of fallback search per request	count	-
`milvus.re_search_cnt.count`Count of requests triggering fallback search operations	count	-
`milvus.re_search_cnt.sum`Sum of fallback searches	count	-
`milvus.rootcoord.collection_num`Number of collections	gauge	-
`milvus.rootcoord.credential_num`Number of credentials	gauge	-
`milvus.rootcoord.ddl_req.count`Count of DDL operations	count	-
`milvus.rootcoord.ddl_req.latency.bucket`Histogram bucket for the latency of each DDL operation	count	-
`milvus.rootcoord.ddl_req.latency.count`Count of DDL operations	count	-
`milvus.rootcoord.ddl_req.latency.sum`Sum of the latencies of DDL operations	count	millisecond
`milvus.rootcoord.ddl_req.latency_in_queue.bucket`Histogram bucket for the latencies of each DDL operation in queue	count	-
`milvus.rootcoord.ddl_req.latency_in_queue.count`Count of DDL operations in queue	count	-
`milvus.rootcoord.ddl_req.latency_in_queue.sum`Sum of the latencies of DDL operations in queue	count	millisecond
`milvus.rootcoord.dml_channel_num`Number of DML channels	gauge	-
`milvus.rootcoord.entity_num`Number of entities, clustered by collection and their status(loaded/total)	gauge	-
`milvus.rootcoord.force_deny_writing_counter.count`The number of times milvus turns into force-deny-writing states	count	-
`milvus.rootcoord.id_alloc.count`Count of ID allocated	count	-
`milvus.rootcoord.indexed_entity_num`Indexed number of entities, clustered by collection, index name and whether it's a vector index	gauge	-
`milvus.rootcoord.msgstream_obj_num`Number of message streams	gauge	-
`milvus.rootcoord.num_of_roles`The number of roles	gauge	-
`milvus.rootcoord.partition_num`Number of partitions	gauge	-
`milvus.rootcoord.produce_tt_lag_ms`Now time minus time travel per physical channel	gauge	millisecond
`milvus.rootcoord.proxy_num`Number of proxy nodes managered by rootcoord	gauge	-
`milvus.rootcoord.qn_mem_high_water_level`Querynode memory high water level	gauge	-
`milvus.rootcoord.sync_timetick_latency.bucket`Histogram bucket for the latencies of synchronizing timetick message	count	-
`milvus.rootcoord.sync_timetick_latency.count`Count of synchronizing timetick message events	count	-
`milvus.rootcoord.sync_timetick_latency.sum`Sum of latencies of synchronizing timetick message events	count	millisecond
`milvus.rootcoord.timestamp`Latest timestamp allocated in memory	gauge	-
`milvus.rootcoord.timestamp_saved`Timestamp saved in meta storage	gauge	-
`milvus.runtime_info`Runtime information of Milvus	gauge	-
`milvus.search.latency.bucket`Histogram bucket for search latencies (ms)	count	-
`milvus.search.latency.count`Count of search events	count	-
`milvus.search.latency.sum`Sum of search latencies (ms)	count	millisecond
`milvus.search.topk.bucket`Histogram bucket for search topk	count	-
`milvus.search.topk.count`Count aggregation of search topk	count	-
`milvus.search.topk.sum`Sum aggregation of search topk	count	-
`milvus.storage.kv_size`Key-value size stats	gauge	-
`milvus.storage.op.count`Count of persistent data operation	count	-
`milvus.storage.request_latency`Request latency on the client side	gauge	-

Official documentation

Official documentation for the Milvus integration

Metric names and descriptions are the official Datadog integration definitions (Copyright Datadog, Inc., BSD-3-Clause), reproduced unedited. The full license terms are on the About page.

Official summary

Metric types

Metrics

Official documentation

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