[wip] ProfileCounters for each part

src/Common/CurrentThread.cpp

@@ -40,6 +40,8 @@ ThreadStatus & CurrentThread::get()
 
 ProfileEvents::Counters & CurrentThread::getProfileEvents()
 {
+    if (unlikely(subthread_profile_events))
+        return *subthread_profile_events;
     return current_thread ? current_thread->performance_counters : ProfileEvents::global_counters;
 }
 

src/Common/CurrentThread.h

@@ -102,29 +102,6 @@ public:
         bool log_peak_memory_usage_in_destructor = true;
     };
 
-    class ScopedAttach : private boost::noncopyable
-    {
-    private:
-        bool attached = false;
-    public:
-        explicit ScopedAttach(const ThreadGroupStatusPtr & thread_group)
-        {
-            if (!CurrentThread::getGroup())
-            {
-                CurrentThread::attachToIfDetached(thread_group);
-                attached = true;
-            }
-        }
-
-        ~ScopedAttach()
-        {
-            if (attached)
-            {
-                CurrentThread::detachQuery();
-            }
-        }
-    };
-
 private:
     static void defaultThreadDeleter();
 

src/Common/ProfileEventsScope.cpp

@@ -0,0 +1,32 @@
+#include <Common/ProfileEventsScope.h>
+
+namespace DB
+{
+extern thread_local constinit ProfileEvents::Counters * subthread_profile_events;
+
+
+ScopedProfileEvents::ScopedProfileEvents()
+    : performance_counters_holder(std::make_unique<ProfileEvents::Counters>())
+    , performance_counters_scope(performance_counters_holder.get())
+{
+    CurrentThread::get().attachProfileCountersScope(performance_counters_scope);
+}
+
+ScopedProfileEvents::ScopedProfileEvents(ProfileEvents::Counters * performance_counters_scope_)
+    : performance_counters_scope(performance_counters_scope_)
+{
+    CurrentThread::get().attachProfileCountersScope(performance_counters_scope);
+}
+
+std::shared_ptr<ProfileEvents::Counters::Snapshot> ScopedProfileEvents::getSnapshot()
+{
+    return std::make_shared<ProfileEvents::Counters::Snapshot>(performance_counters_scope->getPartiallyAtomicSnapshot());
+}
+
+ScopedProfileEvents::~ScopedProfileEvents()
+{
+    subthread_profile_events = nullptr;
+}
+
+
+}

src/Common/ProfileEventsScope.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <Common/ProfileEvents.h>
+#include <Common/CurrentThread.h>
+
+namespace DB
+{
+
+
+/// Use specific performance counters for current thread in the current scope.
+class ScopedProfileEvents : private boost::noncopyable
+{
+public:
+    /// Counters are owned by this object.
+    ScopedProfileEvents();
+
+    /// Shared counters are stored outisde.
+    /// Useful when we calculate metrics entering into some scope several times.
+    explicit ScopedProfileEvents(ProfileEvents::Counters * performance_counters_scope_);
+
+    std::shared_ptr<ProfileEvents::Counters::Snapshot> getSnapshot();
+
+    ~ScopedProfileEvents();
+
+private:
+    /// If set, then performance_counters_scope is owned by this object.
+    /// Otherwise, counters are passed to the constructor from outside.
+    std::unique_ptr<ProfileEvents::Counters> performance_counters_holder;
+
+    ProfileEvents::Counters * performance_counters_scope;
+};
+
+
+}
+

src/Common/ThreadStatus.cpp

@@ -25,6 +25,7 @@ namespace ErrorCodes
 }
 
 thread_local ThreadStatus constinit * current_thread = nullptr;
+thread_local ProfileEvents::Counters constinit * subthread_profile_events = nullptr;
 
 #if !defined(SANITIZER)
 namespace

src/Common/ThreadStatus.h

@@ -107,6 +107,7 @@ using ThreadGroupStatusPtr = std::shared_ptr<ThreadGroupStatus>;
  * - https://github.com/ClickHouse/ClickHouse/pull/40078
  */
 extern thread_local constinit ThreadStatus * current_thread;
+extern thread_local constinit ProfileEvents::Counters * subthread_profile_events;
 
 /** Encapsulates all per-thread info (ProfileEvents, MemoryTracker, query_id, query context, etc.).
   * The object must be created in thread function and destroyed in the same thread before the exit.
@@ -139,6 +140,7 @@ public:
     Deleter deleter;
 
 protected:
+    /// Group of threads, to which this thread attached
     ThreadGroupStatusPtr thread_group;
 
     std::atomic<int> thread_state{ThreadState::DetachedFromQuery};
@@ -244,6 +246,8 @@ public:
     /// Attaches slave thread to existing thread group
     void attachQuery(const ThreadGroupStatusPtr & thread_group_, bool check_detached = true);
 
+    void attachProfileCountersScope(ProfileEvents::Counters * performance_counters_scope);
+
     InternalTextLogsQueuePtr getInternalTextLogsQueue() const
     {
         return thread_state == Died ? nullptr : logs_queue_ptr.lock();

src/Interpreters/PartLog.cpp

@@ -189,16 +189,8 @@ void PartLogElement::appendToBlock(MutableColumns & columns) const
     }
 }
 
-
-bool PartLog::addNewPart(
-    ContextPtr current_context, const MutableDataPartPtr & part, UInt64 elapsed_ns, const ExecutionStatus & execution_status, std::shared_ptr<ProfileEvents::Counters::Snapshot> profile_counters_)
-{
-    return addNewParts(current_context, {part}, elapsed_ns, execution_status, std::move(profile_counters_));
-}
-
-
 bool PartLog::addNewParts(
-    ContextPtr current_context, const PartLog::MutableDataPartsVector & parts, UInt64 elapsed_ns, const ExecutionStatus & execution_status, std::shared_ptr<ProfileEvents::Counters::Snapshot> profile_counters_)
+    ContextPtr current_context, const PartLog::PartLogEntries & parts, const ExecutionStatus & execution_status)
 {
     if (parts.empty())
         return true;
@@ -207,15 +199,17 @@ bool PartLog::addNewParts(
 
     try
     {
-        auto table_id = parts.front()->storage.getStorageID();
+        auto table_id = parts.front().part->storage.getStorageID();
         part_log = current_context->getPartLog(table_id.database_name); // assume parts belong to the same table
         if (!part_log)
             return false;
 
         auto query_id = CurrentThread::getQueryId();
 
-        for (const auto & part : parts)
+        for (const auto & part_log_entry : parts)
         {
+            const auto & part = part_log_entry.part;
+
             PartLogElement elem;
 
             if (!query_id.empty())
@@ -228,7 +222,7 @@ bool PartLog::addNewParts(
             const auto time_now = std::chrono::system_clock::now();
             elem.event_time = timeInSeconds(time_now);
             elem.event_time_microseconds = timeInMicroseconds(time_now);
-            elem.duration_ms = elapsed_ns / 1000000;
+            elem.duration_ms = part_log_entry.elapsed_ns / 1000000;
 
             elem.database_name = table_id.database_name;
             elem.table_name = table_id.table_name;
@@ -245,7 +239,7 @@ bool PartLog::addNewParts(
             elem.error = static_cast<UInt16>(execution_status.code);
             elem.exception = execution_status.message;
 
-            elem.profile_counters = profile_counters_;
+            elem.profile_counters = part_log_entry.profile_counters;
 
             part_log->add(elem);
         }
@@ -259,4 +253,28 @@ bool PartLog::addNewParts(
     return true;
 }
 
+bool PartLog::addNewPart(ContextPtr context, const PartLog::PartLogEntry & part, const ExecutionStatus & execution_status)
+{
+    return addNewParts(context, {part}, execution_status);
+}
+
+bool PartLog::addNewParts(ContextPtr context, const PartLog::MutableDataPartsVector & parts, UInt64 elapsed_ns,
+                 const ExecutionStatus & execution_status)
+{
+    PartLog::PartLogEntries part_log_entries;
+    part_log_entries.reserve(parts.size());
+
+    for (const auto & part : parts)
+        part_log_entries.emplace_back(part, elapsed_ns);
+
+    return addNewParts(context, part_log_entries, execution_status);
+}
+
+bool PartLog::addNewPart(ContextPtr context, const PartLog::MutableDataPartPtr & part, UInt64 elapsed_ns, const ExecutionStatus & execution_status)
+{
+    PartLog::PartLogEntries part_log_entries;
+    part_log_entries.emplace_back(part, elapsed_ns);
+    return addNewParts(context, part_log_entries, execution_status);
+}
+
 }

src/Interpreters/PartLog.h

@@ -109,14 +109,42 @@ class PartLog : public SystemLog<PartLogElement>
     using MutableDataPartPtr = std::shared_ptr<IMergeTreeDataPart>;
     using MutableDataPartsVector = std::vector<MutableDataPartPtr>;
 
+    using ProfileCountersSnapshotPtr = std::shared_ptr<ProfileEvents::Counters::Snapshot>;
+
 public:
+    struct PartLogEntry
+    {
+        std::shared_ptr<IMergeTreeDataPart> part;
+        ProfileCountersSnapshotPtr profile_counters;
+        UInt64 elapsed_ns;
+
+        PartLogEntry(std::shared_ptr<IMergeTreeDataPart> part_, UInt64 elapsed_ns_)
+            : part(std::move(part_)), elapsed_ns(elapsed_ns_)
+        {
+        }
+
+        PartLogEntry(std::shared_ptr<IMergeTreeDataPart> part_, UInt64 elapsed_ns_, ProfileCountersSnapshotPtr profile_counters_)
+            : part(std::move(part_))
+            , profile_counters(std::move(profile_counters_))
+            , elapsed_ns(elapsed_ns_)
+        {
+        }
+    };
+
+    using PartLogEntries = std::vector<PartLogEntry>;
+
+    /// Add a record about creation of new part.
+    static bool addNewPart(ContextPtr context, const PartLogEntry & part,
+                           const ExecutionStatus & execution_status = {});
+
+    static bool addNewParts(ContextPtr context, const PartLogEntries & parts,
+                            const ExecutionStatus & execution_status = {});
+
     /// Add a record about creation of new part.
     static bool addNewPart(ContextPtr context, const MutableDataPartPtr & part, UInt64 elapsed_ns,
-                           const ExecutionStatus & execution_status = {},
-                           std::shared_ptr<ProfileEvents::Counters::Snapshot> profile_counters_ = {});
+                           const ExecutionStatus & execution_status = {});
     static bool addNewParts(ContextPtr context, const MutableDataPartsVector & parts, UInt64 elapsed_ns,
-                            const ExecutionStatus & execution_status = {},
-                            std::shared_ptr<ProfileEvents::Counters::Snapshot> profile_counters_ = {});
+                            const ExecutionStatus & execution_status = {});
 };
 
 }

src/Interpreters/ProfileEventsExt.cpp

@@ -19,6 +19,22 @@ std::shared_ptr<DB::DataTypeEnum8> TypeEnum = std::make_shared<DB::DataTypeEnum8
     { "gauge",     static_cast<Int8>(GAUGE)},
 });
 
+String dumpToString(const Counters::Snapshot & counters, bool nonzero_only)
+{
+    std::vector<String> ss;
+    for (Event event = 0; event < Counters::num_counters; ++event)
+    {
+        UInt64 value = counters[event];
+
+        if (nonzero_only && 0 == value)
+            continue;
+
+        const char * desc = getName(event);
+        ss.push_back(fmt::format("{}: {}", desc, value));
+    }
+    return fmt::format("[{}]", fmt::join(ss, ", "));
+}
+
 /// Put implementation here to avoid extra linking dependencies for clickhouse_common_io
 void dumpToMapColumn(const Counters::Snapshot & counters, DB::IColumn * column, bool nonzero_only)
 {

src/Interpreters/ProfileEventsExt.h

@@ -21,6 +21,8 @@ struct ProfileEventsSnapshot
 
 using ThreadIdToCountersSnapshot = std::unordered_map<UInt64, Counters::Snapshot>;
 
+String dumpToString(const Counters::Snapshot & counters, bool nonzero_only = true);
+
 /// Dumps profile events to columns Map(String, UInt64)
 void dumpToMapColumn(const Counters::Snapshot & counters, DB::IColumn * column, bool nonzero_only = true);
 

src/Interpreters/ThreadStatusExt.cpp

@@ -161,6 +161,12 @@ void ThreadStatus::attachQuery(const ThreadGroupStatusPtr & thread_group_, bool
     setupState(thread_group_);
 }
 
+void ThreadStatus::attachProfileCountersScope(ProfileEvents::Counters * performance_counters_scope)
+{
+    subthread_profile_events = performance_counters_scope;
+    performance_counters_scope->setParent(&performance_counters);
+}
+
 void ThreadStatus::initPerformanceCounters()
 {
     performance_counters_finalized = false;

src/Storages/MergeTree/MergePlainMergeTreeTask.cpp

@@ -3,6 +3,7 @@
 #include <Storages/MergeTree/MergeTreeData.h>
 #include <Storages/StorageMergeTree.h>
 #include <Storages/MergeTree/MergeTreeDataMergerMutator.h>
+#include <Common/ProfileEventsScope.h>
 
 namespace DB
 {
@@ -28,7 +29,7 @@ void MergePlainMergeTreeTask::onCompleted()
 bool MergePlainMergeTreeTask::executeStep()
 {
     /// Metrics will be saved in the thread_group.
-    CurrentThread::ScopedAttach scoped_attach(thread_group);
+    ScopedProfileEvents profile_events_scope(&profile_counters);
 
     /// Make out memory tracker a parent of current thread memory tracker
     MemoryTrackerThreadSwitcherPtr switcher;
@@ -90,7 +91,7 @@ void MergePlainMergeTreeTask::prepare()
     {
         auto & thread_status = CurrentThread::get();
         thread_status.finalizePerformanceCounters();
-        auto profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(thread_status.performance_counters.getPartiallyAtomicSnapshot());
+        auto profile_counters_snapshot = std::make_shared<ProfileEvents::Counters::Snapshot>(profile_counters.getPartiallyAtomicSnapshot());
         merge_task.reset();
         storage.writePartLog(
             PartLogElement::MERGE_PARTS,
@@ -100,7 +101,7 @@ void MergePlainMergeTreeTask::prepare()
             new_part,
             future_part->parts,
             merge_list_entry.get(),
-            profile_counters);
+            std::move(profile_counters_snapshot));
     };
 
     merge_task = storage.merger_mutator.mergePartsToTemporaryPart(

src/Storages/MergeTree/MergePlainMergeTreeTask.h

@@ -83,7 +83,7 @@ private:
     MergeTreeTransactionHolder txn_holder;
     MergeTreeTransactionPtr txn;
 
-    ThreadGroupStatusPtr thread_group = std::make_shared<ThreadGroupStatus>();
+    ProfileEvents::Counters profile_counters;
 };
 
 

src/Storages/MergeTree/MergeTreeData.cpp

@@ -10,6 +10,7 @@
 #include <Common/escapeForFileName.h>
 #include <Common/Increment.h>
 #include <Common/noexcept_scope.h>
+#include <Common/ProfileEventsScope.h>
 #include <Common/quoteString.h>
 #include <Common/scope_guard_safe.h>
 #include <Common/SimpleIncrement.h>
@@ -7347,6 +7348,10 @@ try
     {
         part_log_elem.profile_counters = profile_counters;
     }
+    else
+    {
+        LOG_WARNING(log, "Profile counters are not set");
+    }
 
     part_log->add(part_log_elem);
 }
@@ -7483,6 +7488,7 @@ bool MergeTreeData::moveParts(const CurrentlyMovingPartsTaggerPtr & moving_tagge
     {
         Stopwatch stopwatch;
         MutableDataPartPtr cloned_part;
+        ScopedProfileEvents profile_events_scope;
 
         auto write_part_log = [&](const ExecutionStatus & execution_status)
         {
@@ -7494,7 +7500,7 @@ bool MergeTreeData::moveParts(const CurrentlyMovingPartsTaggerPtr & moving_tagge
                 cloned_part,
                 {moving_part.part},
                 nullptr,
-                nullptr);
+                profile_events_scope.getSnapshot());
         };
 
         // Register in global moves list (StorageSystemMoves)

src/Storages/MergeTree/MergeTreeSink.cpp

@@ -3,6 +3,7 @@
 #include <Storages/StorageMergeTree.h>
 #include <Interpreters/PartLog.h>
 #include <DataTypes/ObjectUtils.h>
+#include <Common/ProfileEventsScope.h>
 
 namespace ProfileEvents
 {
@@ -47,6 +48,7 @@ struct MergeTreeSink::DelayedChunk
         MergeTreeDataWriter::TemporaryPart temp_part;
         UInt64 elapsed_ns;
         String block_dedup_token;
+        ProfileEvents::Counters part_counters;
     };
 
     std::vector<Partition> partitions;
@@ -70,12 +72,18 @@ void MergeTreeSink::consume(Chunk chunk)
 
     for (auto & current_block : part_blocks)
     {
+        ProfileEvents::Counters part_counters;
+
+        UInt64 elapsed_ns = 0;
+        MergeTreeDataWriter::TemporaryPart temp_part;
+
+        {
+            ScopedProfileEvents scoped_attach(&part_counters);
+
             Stopwatch watch;
-        String block_dedup_token;
-
-        auto temp_part = storage.writer.writeTempPart(current_block, metadata_snapshot, context);
-
-        UInt64 elapsed_ns = watch.elapsed();
+            temp_part = storage.writer.writeTempPart(current_block, metadata_snapshot, context);
+            elapsed_ns = watch.elapsed();
+        }
 
         /// If optimize_on_insert setting is true, current_block could become empty after merge
         /// and we didn't create part.
@@ -85,6 +93,7 @@ void MergeTreeSink::consume(Chunk chunk)
         if (!support_parallel_write && temp_part.part->getDataPartStorage().supportParallelWrite())
             support_parallel_write = true;
 
+        String block_dedup_token;
         if (storage.getDeduplicationLog())
         {
             const String & dedup_token = settings.insert_deduplication_token;
@@ -119,7 +128,8 @@ void MergeTreeSink::consume(Chunk chunk)
         {
             .temp_part = std::move(temp_part),
             .elapsed_ns = elapsed_ns,
-            .block_dedup_token = std::move(block_dedup_token)
+            .block_dedup_token = std::move(block_dedup_token),
+            .part_counters = std::move(part_counters),
         });
     }
 
@@ -135,6 +145,8 @@ void MergeTreeSink::finishDelayedChunk()
 
     for (auto & partition : delayed_chunk->partitions)
     {
+        ScopedProfileEvents scoped_attach(&partition.part_counters);
+
         partition.temp_part.finalize();
 
         auto & part = partition.temp_part.part;
@@ -168,7 +180,8 @@ void MergeTreeSink::finishDelayedChunk()
         /// Part can be deduplicated, so increment counters and add to part log only if it's really added
         if (added)
         {
-            PartLog::addNewPart(storage.getContext(), part, partition.elapsed_ns);
+            auto counters_snapshot = std::make_shared<ProfileEvents::Counters::Snapshot>(partition.part_counters.getPartiallyAtomicSnapshot());
+            PartLog::addNewPart(storage.getContext(), PartLog::PartLogEntry(part, partition.elapsed_ns, counters_snapshot));
             storage.incrementInsertedPartsProfileEvent(part->getType());
 
             /// Initiate async merge - it will be done if it's good time for merge and if there are space in 'background_pool'.

src/Storages/MergeTree/MutateFromLogEntryTask.cpp

@@ -184,12 +184,10 @@ ReplicatedMergeMutateTaskBase::PrepareResult MutateFromLogEntryTask::prepare()
 
     return {true, true, [this] (const ExecutionStatus & execution_status)
     {
-        auto & thread_status = CurrentThread::get();
-        thread_status.finalizePerformanceCounters();
-        auto profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(thread_status.performance_counters.getPartiallyAtomicSnapshot());
+        auto profile_counters_snapshot = std::make_shared<ProfileEvents::Counters::Snapshot>(profile_counters.getPartiallyAtomicSnapshot());
         storage.writePartLog(
             PartLogElement::MUTATE_PART, execution_status, stopwatch_ptr->elapsed(),
-            entry.new_part_name, new_part, future_mutated_part->parts, merge_mutate_entry.get(), std::move(profile_counters));
+            entry.new_part_name, new_part, future_mutated_part->parts, merge_mutate_entry.get(), std::move(profile_counters_snapshot));
     }};
 }
 

src/Storages/MergeTree/MutatePlainMergeTreeTask.cpp

@@ -2,6 +2,7 @@
 
 #include <Storages/StorageMergeTree.h>
 #include <Interpreters/TransactionLog.h>
+#include <Common/ProfileEventsScope.h>
 
 namespace DB
 {
@@ -38,9 +39,7 @@ void MutatePlainMergeTreeTask::prepare()
 
     write_part_log = [this] (const ExecutionStatus & execution_status)
     {
-        auto & thread_status = CurrentThread::get();
-        thread_status.finalizePerformanceCounters();
-        auto profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(thread_status.performance_counters.getPartiallyAtomicSnapshot());
+        auto profile_counters_snapshot = std::make_shared<ProfileEvents::Counters::Snapshot>(profile_counters.getPartiallyAtomicSnapshot());
         mutate_task.reset();
         storage.writePartLog(
             PartLogElement::MUTATE_PART,
@@ -50,7 +49,7 @@ void MutatePlainMergeTreeTask::prepare()
             new_part,
             future_part->parts,
             merge_list_entry.get(),
-            profile_counters);
+            std::move(profile_counters_snapshot));
     };
 
     fake_query_context = Context::createCopy(storage.getContext());
@@ -65,8 +64,8 @@ void MutatePlainMergeTreeTask::prepare()
 
 bool MutatePlainMergeTreeTask::executeStep()
 {
-    /// Metrics will be saved in the thread_group.
-    CurrentThread::ScopedAttach scoped_attach(thread_group);
+    /// Metrics will be saved in the local profile_counters.
+    ScopedProfileEvents profile_events_scope(&profile_counters);
 
     /// Make out memory tracker a parent of current thread memory tracker
     MemoryTrackerThreadSwitcherPtr switcher;

src/Storages/MergeTree/MutatePlainMergeTreeTask.h

@@ -78,7 +78,7 @@ private:
     ContextMutablePtr fake_query_context;
     MutateTaskPtr mutate_task;
 
-    ThreadGroupStatusPtr thread_group = std::make_shared<ThreadGroupStatus>();
+    ProfileEvents::Counters profile_counters;
 };
 
 

src/Storages/MergeTree/MutateTask.cpp

@@ -20,6 +20,7 @@
 #include <Storages/MutationCommands.h>
 #include <Storages/MergeTree/MergeTreeDataMergerMutator.h>
 #include <boost/algorithm/string/replace.hpp>
+#include <Common/ProfileEventsScope.h>
 
 
 namespace CurrentMetrics
@@ -814,8 +815,8 @@ public:
 
     bool executeStep() override
     {
-        /// Metrics will be saved in the thread_group.
-        CurrentThread::ScopedAttach scoped_attach(thread_group);
+        /// Metrics will be saved in the local profile_counters.
+        ScopedProfileEvents profile_events_scope(&profile_counters);
 
         auto & current_level_parts = level_parts[current_level];
         auto & next_level_parts = level_parts[next_level];
@@ -918,7 +919,7 @@ private:
     /// TODO(nikitamikhaylov): make this constant a setting
     static constexpr size_t max_parts_to_merge_in_one_level = 10;
 
-    ThreadGroupStatusPtr thread_group = std::make_shared<ThreadGroupStatus>();
+    ProfileEvents::Counters profile_counters;
 };
 
 
@@ -929,7 +930,9 @@ private:
 
 // In short it executed a mutation for the part an original part and for its every projection
 
-/** An overview of how the process of mutation works for projections:
+/**
+ *
+ * An overview of how the process of mutation works for projections:
  *
  * The mutation for original parts is executed block by block,
  * but additionally we execute a SELECT query for each projection over a current block.
@@ -1140,8 +1143,8 @@ public:
 
     bool executeStep() override
     {
-        /// Metrics will be saved in the thread_group.
-        CurrentThread::ScopedAttach scoped_attach(thread_group);
+        /// Metrics will be saved in the local profile_counters.
+        ScopedProfileEvents profile_events_scope(&profile_counters);
 
         switch (state)
         {
@@ -1176,6 +1179,7 @@ public:
     }
 
 private:
+
     void prepare()
     {
         if (ctx->new_data_part->isStoredOnDisk())
@@ -1258,7 +1262,7 @@ private:
 
     std::unique_ptr<PartMergerWriter> part_merger_writer_task;
 
-    ThreadGroupStatusPtr thread_group = std::make_shared<ThreadGroupStatus>();
+    ProfileEvents::Counters profile_counters;
 };
 
 
@@ -1273,8 +1277,8 @@ public:
 
     bool executeStep() override
     {
-        /// Metrics will be saved in the thread_group.
-        CurrentThread::ScopedAttach scoped_attach(thread_group);
+        /// Metrics will be saved in the local profile_counters.
+        ScopedProfileEvents profile_events_scope(&profile_counters);
 
         switch (state)
         {
@@ -1308,6 +1312,7 @@ public:
     }
 
 private:
+
     void prepare()
     {
         if (ctx->execute_ttl_type != ExecuteTTLType::NONE)
@@ -1466,7 +1471,7 @@ private:
     MergedColumnOnlyOutputStreamPtr out;
 
     std::unique_ptr<PartMergerWriter> part_merger_writer_task{nullptr};
-    ThreadGroupStatusPtr thread_group = std::make_shared<ThreadGroupStatus>();
+    ProfileEvents::Counters profile_counters;
 };
 
 

src/Storages/MergeTree/ReplicatedMergeMutateTaskBase.cpp

@@ -2,6 +2,7 @@
 
 #include <Storages/StorageReplicatedMergeTree.h>
 #include <Storages/MergeTree/ReplicatedMergeTreeQueue.h>
+#include <Common/ProfileEventsScope.h>
 
 
 namespace DB
@@ -29,8 +30,8 @@ void ReplicatedMergeMutateTaskBase::onCompleted()
 
 bool ReplicatedMergeMutateTaskBase::executeStep()
 {
-    /// Metrics will be saved in the thread_group.
-    CurrentThread::ScopedAttach scoped_attach(thread_group);
+    /// Metrics will be saved in the local profile_counters.
+    ScopedProfileEvents profile_events_scope(&profile_counters);
 
     std::exception_ptr saved_exception;
 

src/Storages/MergeTree/ReplicatedMergeMutateTaskBase.h

@@ -11,8 +11,8 @@ namespace DB
 
 class StorageReplicatedMergeTree;
 
-
-/** This is used as a base of MergeFromLogEntryTask and MutateFromLogEntryTaskBase
+/**
+ * This is used as a base of MergeFromLogEntryTask and MutateFromLogEntryTaskBase
  */
 class ReplicatedMergeMutateTaskBase : public IExecutableTask
 {
@@ -33,11 +33,8 @@ public:
     }
 
     ~ReplicatedMergeMutateTaskBase() override = default;
-
     void onCompleted() override;
-
     StorageID getStorageID() override;
-
     bool executeStep() override;
 
 protected:
@@ -63,6 +60,8 @@ protected:
     MergeList::EntryPtr merge_mutate_entry{nullptr};
     Poco::Logger * log;
     StorageReplicatedMergeTree & storage;
+    /// ProfileEvents for current part will be stored here
+    ProfileEvents::Counters profile_counters;
 
 private:
     enum class CheckExistingPartResult
@@ -86,7 +85,6 @@ private:
     PartLogWriter part_log_writer{};
     State state{State::NEED_PREPARE};
     IExecutableTask::TaskResultCallback task_result_callback;
-    ThreadGroupStatusPtr thread_group = std::make_shared<ThreadGroupStatus>();
 };
 
 }

src/Storages/StorageReplicatedMergeTree.cpp

@@ -2,8 +2,10 @@
 
 #include <cstddef>
 #include <ranges>
-#include "Common/hex.h"
+
+#include <Common/hex.h>
 #include <Common/Macros.h>
+#include <Common/ProfileEventsScope.h>
 #include <Common/StringUtils/StringUtils.h>
 #include <Common/ZooKeeper/KeeperException.h>
 #include <Common/ZooKeeper/Types.h>
@@ -1592,6 +1594,8 @@ bool StorageReplicatedMergeTree::executeLogEntry(LogEntry & entry)
 
     if (entry.type == LogEntry::ATTACH_PART)
     {
+        ScopedProfileEvents profile_events_scope;
+
         if (MutableDataPartPtr part = attachPartHelperFoundValidPart(entry))
         {
             LOG_TRACE(log, "Found valid local part for {}, preparing the transaction", part->name);
@@ -1602,11 +1606,9 @@ bool StorageReplicatedMergeTree::executeLogEntry(LogEntry & entry)
             renameTempPartAndReplace(part, transaction);
             checkPartChecksumsAndCommit(transaction, part);
 
-            auto & thread_status = CurrentThread::get();
-            thread_status.finalizePerformanceCounters();
-            auto profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(thread_status.performance_counters.getPartiallyAtomicSnapshot());
             writePartLog(PartLogElement::Type::NEW_PART, {}, 0 /** log entry is fake so we don't measure the time */,
-                part->name, part, {} /** log entry is fake so there are no initial parts */, nullptr, std::move(profile_counters));
+                part->name, part, {} /** log entry is fake so there are no initial parts */, nullptr,
+                profile_events_scope.getSnapshot());
 
             return true;
         }
@@ -4007,15 +4009,14 @@ bool StorageReplicatedMergeTree::fetchPart(
     Stopwatch stopwatch;
     MutableDataPartPtr part;
     DataPartsVector replaced_parts;
+    ScopedProfileEvents profile_events_scope;
 
     auto write_part_log = [&] (const ExecutionStatus & execution_status)
     {
-        auto & thread_status = CurrentThread::get();
-        thread_status.finalizePerformanceCounters();
-        auto profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(thread_status.performance_counters.getPartiallyAtomicSnapshot());
         writePartLog(
             PartLogElement::DOWNLOAD_PART, execution_status, stopwatch.elapsed(),
-            part_name, part, replaced_parts, nullptr, std::move(profile_counters));
+            part_name, part, replaced_parts, nullptr,
+            profile_events_scope.getSnapshot());
     };
 
     DataPartPtr part_to_clone;
@@ -4246,15 +4247,14 @@ MutableDataPartStoragePtr StorageReplicatedMergeTree::fetchExistsPart(
     Stopwatch stopwatch;
     MutableDataPartPtr part;
     DataPartsVector replaced_parts;
+    ScopedProfileEvents profile_events_scope;
 
     auto write_part_log = [&] (const ExecutionStatus & execution_status)
     {
-        auto & thread_status = CurrentThread::get();
-        thread_status.finalizePerformanceCounters();
-        auto profile_counters = std::make_shared<ProfileEvents::Counters::Snapshot>(thread_status.performance_counters.getPartiallyAtomicSnapshot());
         writePartLog(
             PartLogElement::DOWNLOAD_PART, execution_status, stopwatch.elapsed(),
-            part_name, part, replaced_parts, nullptr, std::move(profile_counters));
+            part_name, part, replaced_parts, nullptr,
+            profile_events_scope.getSnapshot());
     };
 
     std::function<MutableDataPartPtr()> get_part;

tests/queries/0_stateless/02378_part_log_profile_events.reference

@@ -1 +1,3 @@
 1
+1
+1

tests/queries/0_stateless/02378_part_log_profile_events.sql

@@ -1,13 +1,47 @@
 DROP TABLE IF EXISTS test;
-CREATE TABLE test (x UInt64) ENGINE = MergeTree ORDER BY x;
 
-SET max_block_size = 1;
-INSERT INTO test SELECT * FROM system.numbers LIMIT 1000;
+CREATE TABLE test (key UInt64, val UInt64) engine = MergeTree Order by key PARTITION BY key >= 128;
+
+SET max_block_size = 64, max_insert_block_size = 64, min_insert_block_size_rows = 64;
+
+INSERT INTO test SELECT number AS key, sipHash64(number) AS val FROM numbers(512);
+
+SYSTEM FLUSH LOGS;
+SELECT
+    count(DISTINCT query_id) == 1
+    AND count() >= 512 / 64 -- 512 rows inserted, 64 rows per block
+    AND SUM(ProfileEvents['MergeTreeDataWriterRows']) == 512
+    AND SUM(ProfileEvents['MergeTreeDataWriterUncompressedBytes']) > 1024
+    AND SUM(ProfileEvents['MergeTreeDataWriterCompressedBytes']) > 1024
+    AND SUM(ProfileEvents['MergeTreeDataWriterBlocks']) >= 8
+FROM system.part_log
+WHERE event_time > now() - INTERVAL 10 MINUTE
+    AND database == currentDatabase() AND table == 'test'
+    AND event_type == 'NewPart'
+;
+
 OPTIMIZE TABLE test FINAL;
 
 SYSTEM FLUSH LOGS;
+SELECT
+    count() >= 2 AND SUM(ProfileEvents['MergedRows']) >= 512
+FROM system.part_log
+WHERE event_time > now() - INTERVAL 10 MINUTE
+    AND database == currentDatabase() AND table == 'test'
+    AND event_type == 'MergeParts'
+;
 
--- ProfileEvents field exist and contains something plausible:
-SELECT count() > 0 FROM system.part_log WHERE ProfileEvents['MergedRows'] = 1000 AND table = 'test' AND database = currentDatabase() AND event_time >= now() - 600;
+ALTER TABLE test UPDATE val = 0 WHERE key % 2 == 0 SETTINGS mutations_sync = 2;
+
+SYSTEM FLUSH LOGS;
+SELECT
+    count() == 2
+    AND SUM(ProfileEvents['SelectedRows']) == 512
+    AND SUM(ProfileEvents['FileOpen']) > 2
+FROM system.part_log
+WHERE event_time > now() - INTERVAL 10 MINUTE
+    AND database == currentDatabase() AND table == 'test'
+    AND event_type == 'MutatePart'
+;
 
 DROP TABLE test;