processor_tail_sampling_count_bytes_sampled | sum (monotonic) | int | By | development | yes | decision (string), policy (string), sampled (bool) | Count of bytes that were sampled or not per sampling policy |
processor_tail_sampling_count_spans_sampled | sum (monotonic) | int | {spans} | development | yes | decision (string), policy (string), sampled (bool) | Count of spans that were sampled or not per sampling policy |
processor_tail_sampling_count_spans_with_unparseable_tracestate | sum (monotonic) | int | {spans} | development | yes | | Count of spans skipped while rewriting the effective th because their tracestate could not be parsed |
processor_tail_sampling_count_traces_sampled | sum (monotonic) | int | {traces} | development | yes | decision (string), policy (string), sampled (bool) | Count of traces that were sampled or not per sampling policy |
processor_tail_sampling_early_releases_from_cache_decision | sum (monotonic) | int | {spans} | development | yes | sampled (bool) | Number of spans that were able to be immediately released due to a decision cache hit. |
processor_tail_sampling_global_count_traces_sampled | sum (monotonic) | int | {traces} | development | yes | decision (string), sampled (bool) | Global count of traces that were sampled or not by at least one policy |
processor_tail_sampling_new_trace_id_received | sum (monotonic) | int | {traces} | development | yes | | Counts the arrival of new traces |
processor_tail_sampling_sampling_decision_timer_latency | histogram | int | ms | development | yes | | Latency (in milliseconds) of each run of the sampling decision timer |
processor_tail_sampling_sampling_late_span_age | histogram | int | s | development | yes | | Time (in seconds) from the sampling decision was taken and the arrival of a late span |
processor_tail_sampling_sampling_policy_evaluation_error | sum (monotonic) | int | {errors} | development | yes | | Count of sampling policy evaluation errors |
processor_tail_sampling_sampling_policy_execution_count | sum (monotonic) | int | {executions} | development | yes | policy (string) | Total number of executions of a specific sampling policy |
processor_tail_sampling_sampling_policy_execution_time_sum | sum (monotonic) | int | us | development | yes | policy (string) | Total time spent (in microseconds) executing a specific sampling policy |
processor_tail_sampling_sampling_trace_dropped_too_early | sum (monotonic) | int | {traces} | development | yes | | Count of traces that needed to be dropped before the configured wait time |
processor_tail_sampling_sampling_trace_removal_age | histogram | int | s | development | yes | | Time (in seconds) from arrival of a new trace until its removal from memory |
processor_tail_sampling_sampling_traces_on_memory | gauge | int | {traces} | development | yes | | Tracks the number of traces current on memory |
processor_tail_sampling_traces_dropped_too_large | sum (monotonic) | int | {traces} | development | yes | | Count of traces that were dropped because they were too large |