From 04f4447ab914ec955eabb91169485223725d9528 Mon Sep 17 00:00:00 2001
From: Koushal Kawade <koushaltk@gmail.com>
Date: Wed, 11 Jun 2025 06:27:52 +0000
Subject: [PATCH] Set memory limit for IResearch

---
 3rdParty/iresearch                     | 2 +-
 arangod/IResearch/IResearchFeature.cpp | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/3rdParty/iresearch b/3rdParty/iresearch
index c24abc117de1..61a8a3ca3124 160000
--- a/3rdParty/iresearch
+++ b/3rdParty/iresearch
@@ -1 +1 @@
-Subproject commit c24abc117de144291862349c2e281a76d252c1ff
+Subproject commit 61a8a3ca312492ff234b26a992ae54696e7fbf40
diff --git a/arangod/IResearch/IResearchFeature.cpp b/arangod/IResearch/IResearchFeature.cpp
index ba65a874ce8f..6da591cbca0a 100644
--- a/arangod/IResearch/IResearchFeature.cpp
+++ b/arangod/IResearch/IResearchFeature.cpp
@@ -85,6 +85,8 @@
 #include "VocBase/LogicalCollection.h"
 #include "VocBase/LogicalDataSource.h"
 #include "VocBase/LogicalView.h"
+#include "Basics/PhysicalMemory.h"
+#include "resource_manager.hpp"
 
 #include <absl/strings/str_cat.h>
 
@@ -1105,6 +1107,12 @@ void IResearchFeature::validateOptions(
 void IResearchFeature::prepare() {
   TRI_ASSERT(isEnabled());
 
+  // Set memory limits for IResearchFeature to 50% of available memory.
+  auto physicalMem = static_cast<size_t>(PhysicalMemory::getValue());
+  irs::IResearchMemoryManager::GetInstance()->SetMemoryLimit(physicalMem / 2);
+  LOG_TOPIC("462d7", INFO, arangodb::iresearch::TOPIC) << "Setting IResearch memory limit to " <<
+    physicalMem / 2;
+
   // load all known codecs
   ::irs::formats::init();