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eb81b31132
his patch adds a statistics framework to Alternator: Executor has (for each shard) a _stats object which contains counters for various events, and also is in charge of making these counters visible via Scylla's regular metrics API (http://localhost:9180/metrics). This patch includes a counter for each of DynamoDB's operation types, and we increase the ones we support when handled. We also added counters for total operations and unsupported operations (operation types we don't yet handle). In the future we can easily add many more counters: Define the counter in stats.hh, export it in stats.cc, and increment it in where relevant in executor.cc (or server.cc). Signed-off-by: Nadav Har'El <nyh@scylladb.com>
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* Copyright 2019 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* See the LICENSE.PROPRIETARY file in the top-level directory for licensing information.
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*/
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#pragma once
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#include <cstdint>
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#include <seastar/core/metrics_registration.hh>
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namespace alternator {
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// Object holding per-shard statistics related to Alternator.
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// While this object is alive, these metrics are also registered to be
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// visible by the metrics REST API, with the "alternator" prefix.
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class stats {
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public:
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stats();
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// Count of DynamoDB API operations by types
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struct {
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uint64_t batch_get_item = 0;
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uint64_t batch_write_item = 0;
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uint64_t create_backup = 0;
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uint64_t create_global_table = 0;
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uint64_t create_table = 0;
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uint64_t delete_backup = 0;
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uint64_t delete_item = 0;
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uint64_t delete_table = 0;
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uint64_t describe_backup = 0;
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uint64_t describe_continuous_backups = 0;
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uint64_t describe_endpoints = 0;
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uint64_t describe_global_table = 0;
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uint64_t describe_global_table_settings = 0;
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uint64_t describe_limits = 0;
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uint64_t describe_table = 0;
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uint64_t describe_time_to_live = 0;
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uint64_t get_item = 0;
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uint64_t list_backups = 0;
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uint64_t list_global_tables = 0;
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uint64_t list_tables = 0;
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uint64_t list_tags_of_resource = 0;
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uint64_t put_item = 0;
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uint64_t query = 0;
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uint64_t restore_table_from_backup = 0;
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uint64_t restore_table_to_point_in_time = 0;
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uint64_t scan = 0;
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uint64_t tag_resource = 0;
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uint64_t transact_get_items = 0;
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uint64_t transact_write_items = 0;
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uint64_t untag_resource = 0;
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uint64_t update_continuous_backups = 0;
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uint64_t update_global_table = 0;
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uint64_t update_global_table_settings = 0;
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uint64_t update_item = 0;
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uint64_t update_table = 0;
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uint64_t update_time_to_live = 0;
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} api_operations;
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// Miscellenous event counters
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uint64_t total_operations = 0;
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uint64_t unsupported_operations = 0;
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private:
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// The metric_groups object holds this stat object's metrics registered
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// as long as the stats object is alive.
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seastar::metrics::metric_groups _metrics;
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};
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}
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