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https://github.com/ClickHouse/ClickHouse.git
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aee034a597
- Move some code into module part to avoid dependency from IStorage in SystemLog
- Remove extra headers from SystemLog.h
- Rewrite some code that was relying on headers that was included by SystemLog.h
v2: rebase
v3: squash move into module part with explicit template instantiation
(to make each commit self compilable after rebase)
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
#pragma once
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#include <Interpreters/SystemLog.h>
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#include <Common/ProfileEvents.h>
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#include <Common/CurrentMetrics.h>
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#include <Core/NamesAndTypes.h>
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#include <Core/NamesAndAliases.h>
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#include <vector>
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#include <atomic>
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#include <ctime>
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namespace DB
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{
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/** MetricLog is a log of metric values measured at regular time interval.
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*/
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struct MetricLogElement
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{
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time_t event_time{};
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Decimal64 event_time_microseconds{};
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UInt64 milliseconds{};
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std::vector<ProfileEvents::Count> profile_events;
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std::vector<CurrentMetrics::Metric> current_metrics;
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static std::string name() { return "MetricLog"; }
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static NamesAndTypesList getNamesAndTypes();
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static NamesAndAliases getNamesAndAliases() { return {}; }
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void appendToBlock(MutableColumns & columns) const;
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};
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class MetricLog : public SystemLog<MetricLogElement>
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{
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using SystemLog<MetricLogElement>::SystemLog;
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public:
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void shutdown() override;
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/// Launches a background thread to collect metrics with interval
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void startCollectMetric(size_t collect_interval_milliseconds_);
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/// Stop background thread. Call before shutdown.
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void stopCollectMetric();
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private:
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void metricThreadFunction();
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ThreadFromGlobalPool metric_flush_thread;
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size_t collect_interval_milliseconds;
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std::atomic<bool> is_shutdown_metric_thread{false};
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};
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}
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