8b43609920
Shard-level latencies generate a lot of metrics. This patch reduces the the number of latencies reported by Alternator while keeping the same functionality. On the shard level, summaries will be reported instead of histograms. On the instance level, an aggregated histogram will be reported. Summaries, histograms, and counters are marked with skip_when_empty. Fixes #12230 Closes scylladb/scylladb#17581
102 lines
6.1 KiB
C++
102 lines
6.1 KiB
C++
/*
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* Copyright 2019-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include "stats.hh"
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#include "utils/histogram_metrics_helper.hh"
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#include <seastar/core/metrics.hh>
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namespace alternator {
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const char* ALTERNATOR_METRICS = "alternator";
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stats::stats() : api_operations{} {
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// Register the
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seastar::metrics::label op("op");
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_metrics.add_group("alternator", {
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#define OPERATION(name, CamelCaseName) \
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seastar::metrics::make_total_operations("operation", api_operations.name, \
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seastar::metrics::description("number of operations via Alternator API"), {op(CamelCaseName)}).set_skip_when_empty(),
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#define OPERATION_LATENCY(name, CamelCaseName) \
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seastar::metrics::make_histogram("op_latency", \
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seastar::metrics::description("Latency histogram of an operation via Alternator API"), {op(CamelCaseName)}, [this]{return to_metrics_histogram(api_operations.name.histogram());}).aggregate({seastar::metrics::shard_label}).set_skip_when_empty(), \
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seastar::metrics::make_summary("op_latency_summary", \
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seastar::metrics::description("Latency summary of an operation via Alternator API"), [this]{return to_metrics_summary(api_operations.name.summary());})(op(CamelCaseName)).set_skip_when_empty(),
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OPERATION(batch_get_item, "BatchGetItem")
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OPERATION(batch_write_item, "BatchWriteItem")
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OPERATION(create_backup, "CreateBackup")
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OPERATION(create_global_table, "CreateGlobalTable")
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OPERATION(create_table, "CreateTable")
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OPERATION(delete_backup, "DeleteBackup")
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OPERATION(delete_item, "DeleteItem")
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OPERATION(delete_table, "DeleteTable")
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OPERATION(describe_backup, "DescribeBackup")
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OPERATION(describe_continuous_backups, "DescribeContinuousBackups")
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OPERATION(describe_endpoints, "DescribeEndpoints")
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OPERATION(describe_global_table, "DescribeGlobalTable")
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OPERATION(describe_global_table_settings, "DescribeGlobalTableSettings")
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OPERATION(describe_limits, "DescribeLimits")
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OPERATION(describe_table, "DescribeTable")
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OPERATION(describe_time_to_live, "DescribeTimeToLive")
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OPERATION(get_item, "GetItem")
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OPERATION(list_backups, "ListBackups")
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OPERATION(list_global_tables, "ListGlobalTables")
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OPERATION(list_tables, "ListTables")
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OPERATION(list_tags_of_resource, "ListTagsOfResource")
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OPERATION(put_item, "PutItem")
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OPERATION(query, "Query")
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OPERATION(restore_table_from_backup, "RestoreTableFromBackup")
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OPERATION(restore_table_to_point_in_time, "RestoreTableToPointInTime")
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OPERATION(scan, "Scan")
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OPERATION(tag_resource, "TagResource")
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OPERATION(transact_get_items, "TransactGetItems")
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OPERATION(transact_write_items, "TransactWriteItems")
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OPERATION(untag_resource, "UntagResource")
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OPERATION(update_continuous_backups, "UpdateContinuousBackups")
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OPERATION(update_global_table, "UpdateGlobalTable")
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OPERATION(update_global_table_settings, "UpdateGlobalTableSettings")
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OPERATION(update_item, "UpdateItem")
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OPERATION(update_table, "UpdateTable")
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OPERATION(update_time_to_live, "UpdateTimeToLive")
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OPERATION_LATENCY(put_item_latency, "PutItem")
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OPERATION_LATENCY(get_item_latency, "GetItem")
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OPERATION_LATENCY(delete_item_latency, "DeleteItem")
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OPERATION_LATENCY(update_item_latency, "UpdateItem")
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OPERATION(list_streams, "ListStreams")
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OPERATION(describe_stream, "DescribeStream")
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OPERATION(get_shard_iterator, "GetShardIterator")
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OPERATION(get_records, "GetRecords")
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OPERATION_LATENCY(get_records_latency, "GetRecords")
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});
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_metrics.add_group("alternator", {
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seastar::metrics::make_total_operations("unsupported_operations", unsupported_operations,
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seastar::metrics::description("number of unsupported operations via Alternator API")),
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seastar::metrics::make_total_operations("total_operations", total_operations,
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seastar::metrics::description("number of total operations via Alternator API")),
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seastar::metrics::make_total_operations("reads_before_write", reads_before_write,
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seastar::metrics::description("number of performed read-before-write operations")),
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seastar::metrics::make_total_operations("write_using_lwt", write_using_lwt,
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seastar::metrics::description("number of writes that used LWT")),
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seastar::metrics::make_total_operations("shard_bounce_for_lwt", shard_bounce_for_lwt,
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seastar::metrics::description("number writes that had to be bounced from this shard because of LWT requirements")),
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seastar::metrics::make_total_operations("requests_blocked_memory", requests_blocked_memory,
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seastar::metrics::description("Counts a number of requests blocked due to memory pressure.")),
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seastar::metrics::make_total_operations("requests_shed", requests_shed,
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seastar::metrics::description("Counts a number of requests shed due to overload.")),
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seastar::metrics::make_total_operations("filtered_rows_read_total", cql_stats.filtered_rows_read_total,
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seastar::metrics::description("number of rows read during filtering operations")),
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seastar::metrics::make_total_operations("filtered_rows_matched_total", cql_stats.filtered_rows_matched_total,
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seastar::metrics::description("number of rows read and matched during filtering operations")),
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seastar::metrics::make_total_operations("filtered_rows_dropped_total", [this] { return cql_stats.filtered_rows_read_total - cql_stats.filtered_rows_matched_total; },
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seastar::metrics::description("number of rows read and dropped during filtering operations")),
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});
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}
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}
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