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71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
#include <Storages/MergeTree/MergeList.h>
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#include <Common/CurrentMetrics.h>
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#include <Poco/Ext/ThreadNumber.h>
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#include <Common/CurrentThread.h>
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namespace CurrentMetrics
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{
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extern const Metric MemoryTrackingForMerges;
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}
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namespace DB
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{
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MergeListElement::MergeListElement(const std::string & database, const std::string & table, const std::string & result_part_name,
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const MergeTreeData::DataPartsVector & source_parts)
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: database{database}, table{table}, result_part_name{result_part_name}, num_parts{source_parts.size()},
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thread_number{Poco::ThreadNumber::get()}
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{
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for (const auto & source_part : source_parts)
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source_part_names.emplace_back(source_part->name);
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if (!source_parts.empty())
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partition_id = source_parts[0]->info.partition_id;
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/// Each merge is executed into separate background processing pool thread
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background_thread_memory_tracker = &CurrentThread::getMemoryTracker();
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if (background_thread_memory_tracker)
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{
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memory_tracker.setMetric(CurrentMetrics::MemoryTrackingForMerges);
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background_thread_memory_tracker_prev_parent = background_thread_memory_tracker->getParent();
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background_thread_memory_tracker->setParent(&memory_tracker);
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}
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}
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MergeInfo MergeListElement::getInfo() const
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{
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MergeInfo res;
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res.database = database;
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res.table = table;
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res.result_part_name = result_part_name;
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res.partition_id = partition_id;
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res.elapsed = watch.elapsedSeconds();
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res.progress = progress.load(std::memory_order_relaxed);
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res.num_parts = num_parts;
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res.total_size_bytes_compressed = total_size_bytes_compressed;
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res.total_size_marks = total_size_marks;
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res.bytes_read_uncompressed = bytes_read_uncompressed.load(std::memory_order_relaxed);
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res.bytes_written_uncompressed = bytes_written_uncompressed.load(std::memory_order_relaxed);
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res.rows_read = rows_read.load(std::memory_order_relaxed);
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res.rows_written = rows_written.load(std::memory_order_relaxed);
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res.columns_written = columns_written.load(std::memory_order_relaxed);
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res.memory_usage = memory_tracker.get();
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res.thread_number = thread_number;
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for (const auto & source_part_name : source_part_names)
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res.source_part_names.emplace_back(source_part_name);
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return res;
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}
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MergeListElement::~MergeListElement()
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{
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/// Unplug memory_tracker from current background processing pool thread
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if (background_thread_memory_tracker)
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background_thread_memory_tracker->setParent(background_thread_memory_tracker_prev_parent);
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}
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}
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