Fix multiple issues with memory tracking

src/Common/MemoryTracker.cpp

@@ -30,6 +30,8 @@ namespace ProfileEvents
 
 static constexpr size_t log_peak_memory_usage_every = 1ULL << 30;
 
+thread_local bool MemoryTracker::BlockerInThread::is_blocked = false;
+
 MemoryTracker total_memory_tracker(nullptr, VariableContext::Global);
 
 
@@ -56,13 +58,15 @@ MemoryTracker::~MemoryTracker()
 void MemoryTracker::logPeakMemoryUsage() const
 {
     const auto * description = description_ptr.load(std::memory_order_relaxed);
-    LOG_DEBUG(&Poco::Logger::get("MemoryTracker"), "Peak memory usage{}: {}.", (description ? " " + std::string(description) : ""), ReadableSize(peak));
+    LOG_DEBUG(&Poco::Logger::get("MemoryTracker"),
+        "Peak memory usage{}: {}.", (description ? " " + std::string(description) : ""), ReadableSize(peak));
 }
 
 void MemoryTracker::logMemoryUsage(Int64 current) const
 {
     const auto * description = description_ptr.load(std::memory_order_relaxed);
-    LOG_DEBUG(&Poco::Logger::get("MemoryTracker"), "Current memory usage{}: {}.", (description ? " " + std::string(description) : ""), ReadableSize(current));
+    LOG_DEBUG(&Poco::Logger::get("MemoryTracker"),
+        "Current memory usage{}: {}.", (description ? " " + std::string(description) : ""), ReadableSize(current));
 }
 
 
@@ -71,7 +75,7 @@ void MemoryTracker::alloc(Int64 size)
     if (size < 0)
         throw DB::Exception(DB::ErrorCodes::LOGICAL_ERROR, "Negative size ({}) is passed to MemoryTracker. It is a bug.", size);
 
-    if (blocker.isCancelled())
+    if (BlockerInThread::isBlocked())
         return;
 
     /** Using memory_order_relaxed means that if allocations are done simultaneously,
@@ -86,12 +90,15 @@ void MemoryTracker::alloc(Int64 size)
     Int64 current_hard_limit = hard_limit.load(std::memory_order_relaxed);
     Int64 current_profiler_limit = profiler_limit.load(std::memory_order_relaxed);
 
-    /// Cap the limit to the total_memory_tracker, since it may include some drift.
+    /// Cap the limit to the total_memory_tracker, since it may include some drift
+    /// for user-level memory tracker.
     ///
     /// And since total_memory_tracker is reset to the process resident
     /// memory peridically (in AsynchronousMetrics::update()), any limit can be
     /// capped to it, to avoid possible drift.
-    if (unlikely(current_hard_limit && will_be > current_hard_limit))
+    if (unlikely(current_hard_limit
+        && will_be > current_hard_limit
+        && level == VariableContext::User))
     {
         Int64 total_amount = total_memory_tracker.get();
         if (amount > total_amount)
@@ -104,10 +111,8 @@ void MemoryTracker::alloc(Int64 size)
     std::bernoulli_distribution fault(fault_probability);
     if (unlikely(fault_probability && fault(thread_local_rng)))
     {
-        free(size);
-
         /// Prevent recursion. Exception::ctor -> std::string -> new[] -> MemoryTracker::alloc
-        auto untrack_lock = blocker.cancel(); // NOLINT
+        BlockerInThread untrack_lock;
 
         ProfileEvents::increment(ProfileEvents::QueryMemoryLimitExceeded);
         std::stringstream message;
@@ -118,12 +123,13 @@ void MemoryTracker::alloc(Int64 size)
             << " (attempt to allocate chunk of " << size << " bytes)"
             << ", maximum: " << formatReadableSizeWithBinarySuffix(current_hard_limit);
 
+        amount.fetch_sub(size, std::memory_order_relaxed);
         throw DB::Exception(message.str(), DB::ErrorCodes::MEMORY_LIMIT_EXCEEDED);
     }
 
     if (unlikely(current_profiler_limit && will_be > current_profiler_limit))
     {
-        auto no_track = blocker.cancel();
+        BlockerInThread untrack_lock;
         DB::TraceCollector::collect(DB::TraceType::Memory, StackTrace(), size);
         setOrRaiseProfilerLimit((will_be + profiler_step - 1) / profiler_step * profiler_step);
     }
@@ -131,16 +137,14 @@ void MemoryTracker::alloc(Int64 size)
     std::bernoulli_distribution sample(sample_probability);
     if (unlikely(sample_probability && sample(thread_local_rng)))
     {
-        auto no_track = blocker.cancel();
+        BlockerInThread untrack_lock;
         DB::TraceCollector::collect(DB::TraceType::MemorySample, StackTrace(), size);
     }
 
     if (unlikely(current_hard_limit && will_be > current_hard_limit))
     {
-        free(size);
-
         /// Prevent recursion. Exception::ctor -> std::string -> new[] -> MemoryTracker::alloc
-        auto no_track = blocker.cancel(); // NOLINT
+        BlockerInThread untrack_lock;
 
         ProfileEvents::increment(ProfileEvents::QueryMemoryLimitExceeded);
         std::stringstream message;
@@ -151,6 +155,7 @@ void MemoryTracker::alloc(Int64 size)
             << " (attempt to allocate chunk of " << size << " bytes)"
             << ", maximum: " << formatReadableSizeWithBinarySuffix(current_hard_limit);
 
+        amount.fetch_sub(size, std::memory_order_relaxed);
         throw DB::Exception(message.str(), DB::ErrorCodes::MEMORY_LIMIT_EXCEEDED);
     }
 
@@ -177,13 +182,13 @@ void MemoryTracker::updatePeak(Int64 will_be)
 
 void MemoryTracker::free(Int64 size)
 {
-    if (blocker.isCancelled())
+    if (BlockerInThread::isBlocked())
         return;
 
     std::bernoulli_distribution sample(sample_probability);
     if (unlikely(sample_probability && sample(thread_local_rng)))
     {
-        auto no_track = blocker.cancel();
+        BlockerInThread untrack_lock;
         DB::TraceCollector::collect(DB::TraceType::MemorySample, StackTrace(), -size);
     }
 
@@ -298,11 +303,3 @@ namespace CurrentMemoryTracker
         }
     }
 }
-
-DB::SimpleActionLock getCurrentMemoryTrackerActionLock()
-{
-    auto * memory_tracker = DB::CurrentThread::getMemoryTracker();
-    if (!memory_tracker)
-        return {};
-    return memory_tracker->blocker.cancel();
-}

src/Common/MemoryTracker.h

@@ -3,7 +3,6 @@
 #include <atomic>
 #include <common/types.h>
 #include <Common/CurrentMetrics.h>
-#include <Common/SimpleActionBlocker.h>
 #include <Common/VariableContext.h>
 
 
@@ -131,8 +130,18 @@ public:
     /// Prints info about peak memory consumption into log.
     void logPeakMemoryUsage() const;
 
-    /// To be able to temporarily stop memory tracker
-    DB::SimpleActionBlocker blocker;
+    /// To be able to temporarily stop memory tracking from current thread.
+    struct BlockerInThread
+    {
+    private:
+        BlockerInThread(const BlockerInThread &) = delete;
+        BlockerInThread & operator=(const BlockerInThread &) = delete;
+        static thread_local bool is_blocked;
+    public:
+        BlockerInThread() { is_blocked = true; }
+        ~BlockerInThread() { is_blocked = false; }
+        static bool isBlocked() { return is_blocked; }
+    };
 };
 
 extern MemoryTracker total_memory_tracker;
@@ -145,7 +154,3 @@ namespace CurrentMemoryTracker
     void realloc(Int64 old_size, Int64 new_size);
     void free(Int64 size);
 }
-
-
-/// Holding this object will temporarily disable memory tracking.
-DB::SimpleActionLock getCurrentMemoryTrackerActionLock();

src/Interpreters/SystemLog.h

@@ -233,7 +233,7 @@ void SystemLog<LogElement>::add(const LogElement & element)
     /// The size of allocation can be in order of a few megabytes.
     /// But this should not be accounted for query memory usage.
     /// Otherwise the tests like 01017_uniqCombined_memory_usage.sql will be flacky.
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     /// Should not log messages under mutex.
     bool queue_is_half_full = false;

src/Interpreters/executeQuery.cpp

@@ -157,7 +157,7 @@ static void setExceptionStackTrace(QueryLogElement & elem)
 {
     /// Disable memory tracker for stack trace.
     /// Because if exception is "Memory limit (for query) exceed", then we probably can't allocate another one string.
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     try
     {

src/Storages/MergeTree/IMergeTreeDataPart.cpp

@@ -408,7 +408,7 @@ void IMergeTreeDataPart::loadColumnsChecksumsIndexes(bool require_columns_checks
     /// Memory should not be limited during ATTACH TABLE query.
     /// This is already true at the server startup but must be also ensured for manual table ATTACH.
     /// Motivation: memory for index is shared between queries - not belong to the query itself.
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     loadColumns(require_columns_checksums);
     loadChecksums(require_columns_checksums);

src/Storages/MergeTree/MergeTreeDataPartWriterOnDisk.cpp

@@ -212,7 +212,7 @@ void MergeTreeDataPartWriterOnDisk::calculateAndSerializePrimaryIndex(const Bloc
      * And otherwise it will look like excessively growing memory consumption in context of query.
      *  (observed in long INSERT SELECTs)
      */
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     /// Write index. The index contains Primary Key value for each `index_granularity` row.
 

src/Storages/MergeTree/MergeTreeMarksLoader.cpp

@@ -48,7 +48,7 @@ const MarkInCompressedFile & MergeTreeMarksLoader::getMark(size_t row_index, siz
 MarkCache::MappedPtr MergeTreeMarksLoader::loadMarksImpl()
 {
     /// Memory for marks must not be accounted as memory usage for query, because they are stored in shared cache.
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     size_t file_size = disk->getFileSize(mrk_path);
     size_t mark_size = index_granularity_info.getMarkSizeInBytes(columns_in_mark);

src/Storages/StorageBuffer.cpp

@@ -315,7 +315,7 @@ static void appendBlock(const Block & from, Block & to)
 
     size_t old_rows = to.rows();
 
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     try
     {
@@ -693,7 +693,7 @@ void StorageBuffer::writeBlockToDestination(const Block & block, StoragePtr tabl
     }
     auto destination_metadata_snapshot = table->getInMemoryMetadataPtr();
 
-    auto temporarily_disable_memory_tracker = getCurrentMemoryTrackerActionLock();
+    MemoryTracker::BlockerInThread temporarily_disable_memory_tracker;
 
     auto insert = std::make_shared<ASTInsertQuery>();
     insert->table_id = destination_id;

tests/queries/0_stateless/01529_bad_memory_tracking.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+CLICKHOUSE_CLIENT_SERVER_LOGS_LEVEL=fatal
+
+CURDIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
+. "$CURDIR"/../shell_config.sh
+
+for _ in {1..10}; do
+    ${CLICKHOUSE_CLIENT} --max_memory_usage '10G' --query "SELECT i FROM generateRandom('i Array(Int8)', 1, 1, 1048577) LIMIT 65536" 2>&1 | grep -v -P '^(Received exception from server|Code: 241)'
+done