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Flush StorageBuffer into multiple threads if num_layers > 1

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This commit is contained in:
alesapin 2024-02-18 13:15:24 +01:00
parent ea06825ddc
commit 8f29320a73
3 changed files with 16 additions and 1 deletions
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3
src/Common/CurrentMetrics.cpp
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@ -262,6 +262,9 @@
M(ActiveTimersInQueryProfiler, "Number of Active thread local timers in QueryProfiler") \
M(RefreshableViews, "Number materialized views with periodic refreshing (REFRESH)") \
M(RefreshingViews, "Number of materialized views currently executing a refresh") \
M(StorageBufferFlushThreads, "Number of threads for background flushes in StorageBuffer") \
M(StorageBufferFlushThreadsActive, "Number of threads for background flushes in StorageBuffer running a task") \
M(StorageBufferFlushThreadsScheduled, "Number of queued or active threads for background flushes in StorageBuffer")
#ifdef APPLY_FOR_EXTERNAL_METRICS
#define APPLY_FOR_METRICS(M) APPLY_FOR_BUILTIN_METRICS(M) APPLY_FOR_EXTERNAL_METRICS(M)

10
src/Storages/StorageBuffer.cpp
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@ -56,6 +56,9 @@ namespace CurrentMetrics
{
extern const Metric StorageBufferRows;
extern const Metric StorageBufferBytes;
extern const Metric StorageBufferFlushThreads;
extern const Metric StorageBufferFlushThreadsActive;
extern const Metric StorageBufferFlushThreadsScheduled;
}
@ -131,6 +134,7 @@ StorageBuffer::StorageBuffer(
: IStorage(table_id_)
, WithContext(context_->getBufferContext())
, num_shards(num_shards_)
, flush_pool(CurrentMetrics::StorageBufferFlushThreads, CurrentMetrics::StorageBufferFlushThreadsActive, CurrentMetrics::StorageBufferFlushThreadsScheduled, num_shards, 0, num_shards_)
, buffers(num_shards_)
, min_thresholds(min_thresholds_)
, max_thresholds(max_thresholds_)
@ -802,7 +806,13 @@ bool StorageBuffer::checkThresholdsImpl(bool direct, size_t rows, size_t bytes,
void StorageBuffer::flushAllBuffers(bool check_thresholds)
{
for (auto & buf : buffers)
{
flush_pool.scheduleOrThrowOnError([&] ()
{
flushBuffer(buf, check_thresholds, false);
});
}
flush_pool.wait();
}

2
src/Storages/StorageBuffer.h
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@ -3,6 +3,7 @@
#include <Core/BackgroundSchedulePool.h>
#include <Core/NamesAndTypes.h>
#include <Storages/IStorage.h>
#include <Common/ThreadPool.h>
#include <Poco/Event.h>
@ -149,6 +150,7 @@ private:
/// There are `num_shards` of independent buffers.
const size_t num_shards;
ThreadPool flush_pool;
std::vector<Buffer> buffers;
const Thresholds min_thresholds;