Streaming Metrics
The Hydrolix stack includes Prometheus, an open-source metrics database. While the Stack runs, Hydrolix continuously updates its Prometheus instance with metrics information. You can query, view, and actively monitor this information through the use of a stack's Grafana instance or you can access it via your own monitoring platform.
Using Prometheus directly
Prometheus has its own web-based UI, available by visiting https://<YourHostname/prometheus
in your web browser.
This view is far more basic than Grafana's, suitable for quickly entering queries and seeing simple, graphed results. Hydrolix does make this feature available immediately, without any additional setup.
Hydrolix's metrics
This table lists the metrics available, and which components update them.
If more than one component uses a given metric, then querying it will return results from all relevant components. You can restrict results to a specific component by adding a service
keyword to your query, e.g. "process_open_fds{service="stream-peer"}
".
For more information about metric types, refer to Prometheus's documentation.
Streaming metrics
HTTP Stream Ingest
These metrics are specific to the use of streaming data sources.
Metric | Type | Components | Purpose |
---|---|---|---|
http_source_byte_count | Counter | Stream head | Count of bytes processed. |
http_source_request_count | Counter | Stream head | Count of http requests. |
http_source_request_duration_ns | Histogram | Stream head | A histogram of HTTP request durations in nanoseconds. |
http_source_request_error_count | Counter | Stream head | Count of http request failures. |
http_source_row_count | Counter | Stream head | Count of rows processed. |
http_source_value_count | Counter | Stream head | Count of values processed. |
kinesis_source_byte_count | Counter | Stream peer | Count of bytes read from Kinesis. |
kinesis_source_checkpoint_count | Counter | Stream peer | Count of Kinesis checkpoint operations. |
kinesis_source_checkpoint_duration_ns | Histogram | Stream peer | Duration of Kinesis checkpoint operations. |
kinesis_source_checkpoint_error_count | Counter | Stream peer | Count of errors in Kinesis checkpoint operations. |
kinesis_source_error_count | Counter | Stream peer | Count of errors in Kinesis source reads. |
kinesis_source_lag_ms | Gauge | Stream peer | Measure of lag in Kinesis source. |
kinesis_source_operation_count | Counter | Stream peer | Count of operations on Kinesis. |
kinesis_source_operation_duration_ns | Histogram | Stream peer | Histogram of duration of operations on Kinesis. |
kinesis_source_record_count | Counter | Stream peer | Count of records read from Kinesis. |
kinesis_source_row_count | Counter | Stream peer | Count of rows read from Kinesis. |
kinesis_source_value_count | Counter | Stream peer | Count of values read from Kinesis. |
Indexer Metrics
Metric | Type | Components | Purpose |
---|---|---|---|
indexer_rows_written | Histogram | Stream Peer | Total rows indexed (written to partitions) |
indexer_bytes_written | Histogram | Stream Peer | Total bytes indexed (written to partitions) |
indexer_partitions_rejected | Histogram | Stream Peer | Histogram of partitions not able to written. If value is 0=raw data parsing failed, 1=raw data / transform schema mismatch, 3=Error writing partition file, 4= Other Error during indexing |
indexer_partitions_written | Histogram | Stream Peer | Total partitions created |
indexer_partition_write_seconds | Histogram | Stream Peer | Time from receiving indexing query to writing partition file (seconds) |
Go environment metrics
These metrics track resources used by Hydrolix's Go environments.
Metric | Type | Components | Purpose |
---|---|---|---|
go_gc_duration_seconds | Summary | Batch peer, Stream head, Stream peer | A summary of the pause duration of garbage collection cycles. |
go_goroutines | Gauge | Batch peer, Stream head, Stream peer | Number of goroutines that currently exist. |
go_info | Gauge | Batch peer, Stream head, Stream peer | Information about the Go environment. |
go_memstats_alloc_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes allocated and still in use. |
go_memstats_alloc_bytes_total | Counter | Batch peer, Stream head, Stream peer | Total number of bytes allocated, even if freed. |
go_memstats_buck_hash_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes used by the profiling bucket hash table. |
go_memstats_frees_total | Counter | Batch peer, Stream head, Stream peer | Total number of frees. |
go_memstats_gc_cpu_fraction | Gauge | Batch peer, Stream head, Stream peer | The fraction of this program's available CPU time used by the GC since the program started. |
go_memstats_gc_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes used for garbage collection system metadata. |
go_memstats_heap_alloc_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of heap bytes allocated and still in use. |
go_memstats_heap_idle_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of heap bytes waiting to be used. |
go_memstats_heap_inuse_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of heap bytes that are in use. |
go_memstats_heap_objects | Gauge | Batch peer, Stream head, Stream peer | Number of allocated objects. |
go_memstats_heap_released_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of heap bytes released to OS. |
go_memstats_heap_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of heap bytes obtained from system. |
go_memstats_last_gc_time_seconds | Gauge | Batch peer, Stream head, Stream peer | Number of seconds since 1970 of last garbage collection. |
go_memstats_lookups_total | Counter | Batch peer, Stream head, Stream peer | Total number of pointer lookups. |
go_memstats_mallocs_total | Counter | Batch peer, Stream head, Stream peer | Total number of mallocs. |
go_memstats_mcache_inuse_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes in use by mcache structures. |
go_memstats_mcache_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes used for mcache structures obtained from system. |
go_memstats_mspan_inuse_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes in use by mspan structures. |
go_memstats_mspan_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes used for mspan structures obtained from system. |
go_memstats_next_gc_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of heap bytes when next garbage collection will take place. |
go_memstats_other_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes used for other system allocations. |
go_memstats_stack_inuse_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes in use by the stack allocator. |
go_memstats_stack_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes obtained from system for stack allocator. |
go_memstats_sys_bytes | Gauge | Batch peer, Stream head, Stream peer | Number of bytes obtained from system. |
go_threads | Gauge | Batch peer, Stream head, Stream peer | Number of OS threads created. |
Kafka Ingest
These metrics are specific to the use of Kafka data sources.
Metric | Type | Components | Purpose |
---|---|---|---|
kafka_source_byte_count | Counter | Stream peer | Count of bytes read from Kafka. |
kafka_source_commit_duration_ns | Histogram | Stream peer | Kafka commit duration. |
kafka_source_read_count | Counter | Stream peer | Count of Kafka reads. |
kafka_source_read_duration_ns | Histogram | Stream peer | Kafka read duration. |
kafka_source_read_error_count | Counter | Stream peer | Count of Kafka errors. |
kafka_source_row_count | Counter | Stream peer | Count of rows processed. |
kafka_source_value_count | Counter | Stream peer | Count of values processed. |
General metrics
These metrics track various counters and statistics regarding data ingestion.
Metric | Type | Components | Purpose |
---|---|---|---|
bytes_written | Counter | Batch peer, Stream peer | Bytes written to the indexer. |
partitions_created | Counter | Batch peer, Stream peer | Count of partitions created. |
process_cpu_seconds_total | Counter | Batch peer, Stream head, Stream peer | Total user and system CPU time spent in seconds. |
process_max_fds | Gauge | Batch peer, Stream head, Stream peer | Maximum number of open file descriptors. |
process_open_fds | Gauge | Batch peer, Stream head, Stream peer | Number of open file descriptors. |
process_resident_memory_bytes | Gauge | Batch peer, Stream head, Stream peer | Resident memory size in bytes. |
process_start_time_seconds | Gauge | Batch peer, Stream head, Stream peer | Start time of the process since unix epoch in seconds. |
process_virtual_memory_bytes | Gauge | Batch peer, Stream head, Stream peer | Virtual memory size in bytes. |
process_virtual_memory_max_bytes | Gauge | Batch peer, Stream head, Stream peer | Maximum amount of virtual memory available in bytes. |
promhttp_metric_handler_requests_in_flight | Gauge | Batch peer, Stream head, Stream peer | Current number of scrapes being served. |
promhttp_metric_handler_requests_total | Counter | Batch peer, Stream head, Stream peer | Total number of scrapes by HTTP status code. |
Updated 17 days ago