Metrics reference

The following list shows the metrics available in AxoSyslog.

classified_events_total

Description: Default metric of the metrics-probe() parser.

disk_queue_capacity_bytes

Description: Maximal size of the disk queue (in bytes), as set in the capacity-bytes() disk-buffer option.

disk_queue_capacity

Description: The size of the overflow queue of the destination, as set in the flow-control-window-size() disk-buffer option.

disk_queue_dir_available_bytes

Description: The size of the space available in the directories where disk-buffer files are stored (including directories storing abandoned disk-buffers), in bytes.

disk_queue_disk_allocated_bytes

Description: The actual size of the disk-buffer files, in bytes.

disk_queue_disk_usage_bytes

Description: Total size of data waiting in each disk-buffer, in bytes.

disk_queue_events

Description: Number of messages waiting in each disk-buffer by destination.

disk_queue_memory_usage_bytes

Description: Amount of memory used for caching disk-buffers, in bytes.

disk_queue_processed_events_total

Description: The number of events processed since startup by each disk-buffer.

event_processing_latency_seconds

Description: Histogram of the latency (time from receiving the message to fully processing it), from the source or destination perspective.

events_allocated_bytes

Description: The total amount of memory used by log messages in AxoSyslog.

filtered_events_total

Description: The total number of messages that matched and didn’t match a filter, for each filter in the configuration file.

input_event_bytes_total

Description: Incoming log messages processed by each source, measured in bytes.

input_events_total

Description: Number of incoming log messages processed by each source.

input_window_available

Description: Available on stats(level(3)). Shows the current size of the flow-control window (how much is still free from log-iw-size()).

input_window_capacity

Description: Available on stats(level(3)). Shows the value of log-iw-size() (the size of the flow-control window).

input_window_full_total

Description: The total number of input window full events, for the entire configuration. These events cause AxoSyslog to throttle the source. Available on stats(level(1)).

internal_events_queue_capacity

Description: The internal queue size of the internal() source.

internal_events_total

Description: The number of messages the internal() source has queued, processed, or dropped.

io_worker_latency_seconds

Description: Shows how overloaded the IO workers of AxoSyslog are.

last_config_file_modification_timestamp_seconds

Description: The date when the configuration file was last modified.

last_config_reload_timestamp_seconds

Description: The date when the AxoSyslog configuration was last reloaded. If it differs from last_successful_config_reload_timestamp_seconds, reloading the configuration has failed.

last_successful_config_reload_timestamp_seconds

Description: The date when the AxoSyslog configuration was last reloaded successfully.

mainloop_io_worker_roundtrip_latency_seconds

Description: Shows how overloaded the main AxoSyslog loop is (how much time it takes to start a new worker). Values close to 0 are good, high values indicate high load or processing bottleneck.

memory_queue_capacity

Description: Shows the capacity (maximum possible size) of each queue. Note that this metric publishes log-fifo-size(), which only limits non-flow-controlled messages. Messages coming from flow-controlled paths aren’t limited by log-fifo-size(), but by the log-iw-size() of their corresponding source. For metrics on log-iw-size(), see input_window_available and input_window_capacity.

memory_queue_events

Description: Number of messages waiting in each memory queue by destination.

memory_queue_memory_usage_bytes

Description: Total bytes of data waiting in each memory queue.

memory_queue_processed_events_total

Description: The number of events processed since startup by each queue.

output_active_worker_partitions

Description: The number of active partitions when worker-partition-autoscaling() is set to yes.

output_batch_size_bytes

Description: Histogram-style metrics for the destination.

output_batch_size_events

Description: Histogram-style metrics for the destination.

output_batch_timedout_total

Description: For destinations that use batching, it shows the number of batches that were sent because of timeout (either batch-timeout() or batch-idle-timeout() expired).

output_event_bytes_total

Description: Log messages sent to each destination, measured in bytes.

output_event_latency_seconds

Description: Histogram of the latency: time from receiving the message to delivering it to the destination.

output_event_retries_total

Description: Shows the number of events when AxoSyslog retried sending a message.

output_event_size_bytes

Description: Histogram-style metrics for the destination.

output_events_total

Description: Number of log messages sent to each destination, showing sent and dropped messages.

output_grpc_requests_total

Description: The total number of gRPC requests.

output_http_requests_total

Description: Available on stats(level(1)) The total number of HTTP requests.

output_request_latency_seconds

Description: Histogram-style metrics for the destination.

output_unreachable

Description: A bool-like metric, which shows whether a destination is reachable or not.

output_workers

Description: The number of workers configured for each destination.

parallelize_failed_events_total

Description: The number of events that parallelize() couldn’t process in parallel. Such messages were sent without parallelization. A high number of such events can signal a configuration issue or a bottleneck.

parallelized_assigned_events_total

Description: The number of events each worker has received when using parallelize(). Can show if the workers receive the load unevenly.

parallelized_processed_events_total

Description: The number of events processed using parallelize().

parsed_events_total

Description: Shows the number of messages processed by each parser.

route_egress_total

Description: The number of messages delivered by each named log path.

route_ingress_total

Description: The number of messages entering each named log path.

scratch_buffers_bytes

Description: The number of bytes allocated to internal string buffers.

scratch_buffers_count

Description: The number allocated to internal string buffers.

socket_connections

Description: Number of active connections for the sources.

socket_max_connections

Description: Maximum permitted number of connections for the sources.

socket_receive_buffer_max_bytes

Description: The maximal size socket receive buffer in bytes, as configured in the so-rcvbuf() option of the destination.

socket_receive_buffer_used_bytes

Description: The number of bytes used from the socket receive buffer.

socket_receive_dropped_packets_total

Description: Number of UDP packets dropped by the OS before processing.

socket_rejected_connections_total

Description: The number of connections rejected because the max-connections() limit of the source was reached, for each source.

stats_level

Description: Shows the current verbosity level() of statistics and metrics.

tagged_events_total

Description: The number of messages marked with a tag, for each tag. (Every message automatically has the tag of its source in .source.<id_of_the_source_statement> format.)