69a385fd9d
Schema related files are moved there. This excludes schema files that also interact with mutations, because the mutation module depends on the schema. Those files will have to go into a separate module. Closes #12858
55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
/*
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* Copyright (C) 2016-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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#pragma once
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#include "replica/database_fwd.hh"
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#include "schema/schema_fwd.hh"
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#include <seastar/core/timer.hh>
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#include <seastar/core/sharded.hh>
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using namespace seastar;
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namespace gms { class gossiper; }
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namespace service {
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class cache_hitrate_calculator : public seastar::async_sharded_service<cache_hitrate_calculator>, public seastar::peering_sharded_service<cache_hitrate_calculator> {
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struct stat {
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float h = 0;
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float m = 0;
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stat& operator+=(stat& o) {
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h += o.h;
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m += o.m;
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return *this;
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}
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};
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seastar::sharded<replica::database>& _db;
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gms::gossiper& _gossiper;
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timer<lowres_clock> _timer;
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bool _stopped = false;
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float _diff = 0;
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std::unordered_map<table_id, stat> _rates;
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size_t _slen = 0;
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std::string _gstate;
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uint64_t _published_nr = 0;
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lowres_clock::time_point _published_time;
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future<> _done = make_ready_future();
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future<lowres_clock::duration> recalculate_hitrates();
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void recalculate_timer();
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public:
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cache_hitrate_calculator(seastar::sharded<replica::database>& db, gms::gossiper& g);
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void run_on(size_t master, lowres_clock::duration d = std::chrono::milliseconds(2000));
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future<> stop();
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};
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}
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