allow to configure min alloc size (#7951)

Author: gridnevvvit

ydb/core/kqp/compute_actor/kqp_compute_actor_factory.cpp

@@ -86,6 +86,8 @@ class TKqpCaFactory : public IKqpNodeComputeActorFactory {
     std::atomic<ui64> MkqlLightProgramMemoryLimit = 0;
     std::atomic<ui64> MkqlHeavyProgramMemoryLimit = 0;
     std::atomic<ui64> MinChannelBufferSize = 0;
+    std::atomic<ui64> MinMemAllocSize = 8_MB;
+    std::atomic<ui64> MinMemFreeSize = 32_MB;
 
 public:
     TKqpCaFactory(const NKikimrConfig::TTableServiceConfig::TResourceManager& config,
@@ -104,13 +106,17 @@ class TKqpCaFactory : public IKqpNodeComputeActorFactory {
         MkqlLightProgramMemoryLimit.store(config.GetMkqlLightProgramMemoryLimit());
         MkqlHeavyProgramMemoryLimit.store(config.GetMkqlHeavyProgramMemoryLimit());
         MinChannelBufferSize.store(config.GetMinChannelBufferSize());
+        MinMemAllocSize.store(config.GetMinMemAllocSize());
+        MinMemFreeSize.store(config.GetMinMemFreeSize());
     }
 
     TActorStartResult CreateKqpComputeActor(TCreateArgs&& args) override {
         NYql::NDq::TComputeMemoryLimits memoryLimits;
         memoryLimits.ChannelBufferSize = 0;
         memoryLimits.MkqlLightProgramMemoryLimit = MkqlLightProgramMemoryLimit.load();
         memoryLimits.MkqlHeavyProgramMemoryLimit = MkqlHeavyProgramMemoryLimit.load();
+        memoryLimits.MinMemAllocSize = MinMemAllocSize.load();
+        memoryLimits.MinMemFreeSize = MinMemFreeSize.load();
 
         auto estimation = ResourceManager_->EstimateTaskResources(*args.Task, args.NumberOfTasks);
         NRm::TKqpResourcesRequest resourcesRequest;

ydb/core/kqp/node_service/kqp_node_service.cpp

@@ -378,6 +378,8 @@ class TKqpNodeService : public TActorBootstrapped<TKqpNodeService> {
             FORCE_VALUE(PublishStatisticsIntervalSec);
             FORCE_VALUE(MaxTotalChannelBuffersSize);
             FORCE_VALUE(MinChannelBufferSize);
+            FORCE_VALUE(MinMemAllocSize);
+            FORCE_VALUE(MinMemFreeSize);
 #undef FORCE_VALUE
 
             LOG_I("Updated table service config: " << Config.DebugString());

ydb/core/protos/table_service_config.proto

@@ -23,7 +23,7 @@ message TTableServiceConfig {
         optional uint32 ComputeActorsCount = 1 [default = 10000];
         optional uint64 ChannelBufferSize = 2 [default = 8388608];              //  8 MB
         reserved 3;
-        optional uint64 MkqlLightProgramMemoryLimit = 4 [default = 524288];   // 512 KB
+        optional uint64 MkqlLightProgramMemoryLimit = 4 [default = 1048576];   // 1 MiB
         optional uint64 MkqlHeavyProgramMemoryLimit = 5 [default = 31457280];   // 30 MB
         optional uint64 QueryMemoryLimit = 6 [default = 32212254720];           // 30 GB
         optional uint32 PublishStatisticsIntervalSec = 7 [default = 2];
@@ -43,6 +43,9 @@ message TTableServiceConfig {
         optional uint64 KqpPatternCachePatternAccessTimesBeforeTryToCompile = 20 [default = 5];
         optional uint64 KqpPatternCacheCompiledCapacityBytes = 21 [default = 104857600]; // 100 MiB
         optional double SpillingPercent = 22 [default = 80]; // 100 MiB
+
+        optional uint64 MinMemAllocSize = 23 [default = 8388608]; // 8 MiB
+        optional uint64 MinMemFreeSize = 24  [default = 33554432]; // 32 MiB
     }
 
     message TSpillingServiceConfig {