diff --git a/src/memgraph.cpp b/src/memgraph.cpp
index aba536761..983dd61f9 100644
--- a/src/memgraph.cpp
+++ b/src/memgraph.cpp
@@ -9,6 +9,7 @@
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
+#include <cstdint>
#include "audit/log.hpp"
#include "communication/metrics.hpp"
#include "communication/websocket/auth.hpp"
@@ -48,6 +49,7 @@ namespace {
constexpr const char *kMgUser = "MEMGRAPH_USER";
constexpr const char *kMgPassword = "MEMGRAPH_PASSWORD";
constexpr const char *kMgPassfile = "MEMGRAPH_PASSFILE";
+constexpr uint64_t kMgVmMaxMapCount = 262144;
// TODO: move elsewhere so that we can remove need of interpreter.hpp
void InitFromCypherlFile(memgraph::query::InterpreterContext &ctx, memgraph::dbms::DatabaseAccess &db_acc,
@@ -207,6 +209,17 @@ int main(int argc, char **argv) {
std::cout << "You are running Memgraph v" << gflags::VersionString() << std::endl;
std::cout << "To get started with Memgraph, visit https://memgr.ph/start" << std::endl;
+ const auto vm_max_map_count = memgraph::utils::GetVmMaxMapCount();
+ if (vm_max_map_count.has_value()) {
+ if (vm_max_map_count.value() < kMgVmMaxMapCount) {
+ std::cout << "Max virtual memory areas vm.max_map_count " << vm_max_map_count.value()
+ << " is too low, increase to at least " << kMgVmMaxMapCount << std::endl;
+ }
+ } else {
+ std::cout << "Can't get info on vm.max_map_count, check whether it is too low, vm.max_map_count is at least "
+ << kMgVmMaxMapCount << std::endl;
+ }
+
auto data_directory = std::filesystem::path(FLAGS_data_directory);
memgraph::utils::EnsureDirOrDie(data_directory);
diff --git a/src/query/interpreter.cpp b/src/query/interpreter.cpp
index 7e3ba3dec..ddfc0681b 100644
--- a/src/query/interpreter.cpp
+++ b/src/query/interpreter.cpp
@@ -95,6 +95,7 @@
#include "utils/on_scope_exit.hpp"
#include "utils/readable_size.hpp"
#include "utils/settings.hpp"
+#include "utils/stat.hpp"
#include "utils/string.hpp"
#include "utils/tsc.hpp"
#include "utils/typeinfo.hpp"
@@ -3092,11 +3093,15 @@ PreparedQuery PrepareSystemInfoQuery(ParsedQuery parsed_query, bool in_explicit_
handler = [storage = current_db.db_acc_->get()->storage(), interpreter_isolation_level,
next_transaction_isolation_level] {
auto info = storage->GetBaseInfo();
+ const auto vm_max_map_count = utils::GetVmMaxMapCount();
+ const int64_t vm_max_map_count_storage_info =
+ vm_max_map_count.has_value() ? vm_max_map_count.value() : memgraph::utils::VM_MAX_MAP_COUNT_DEFAULT;
std::vector<std::vector<TypedValue>> results{
{TypedValue("name"), TypedValue(storage->id())},
{TypedValue("vertex_count"), TypedValue(static_cast<int64_t>(info.vertex_count))},
{TypedValue("edge_count"), TypedValue(static_cast<int64_t>(info.edge_count))},
{TypedValue("average_degree"), TypedValue(info.average_degree)},
+ {TypedValue("vm_max_map_count"), TypedValue(vm_max_map_count_storage_info)},
{TypedValue("memory_res"), TypedValue(utils::GetReadableSize(static_cast<double>(info.memory_res)))},
{TypedValue("disk_usage"), TypedValue(utils::GetReadableSize(static_cast<double>(info.disk_usage)))},
{TypedValue("memory_tracked"),
diff --git a/src/storage/v2/inmemory/storage.cpp b/src/storage/v2/inmemory/storage.cpp
index 44c8ac218..c06b204b0 100644
--- a/src/storage/v2/inmemory/storage.cpp
+++ b/src/storage/v2/inmemory/storage.cpp
@@ -20,6 +20,7 @@
#include "storage/v2/inmemory/replication/replication_client.hpp"
#include "storage/v2/inmemory/unique_constraints.hpp"
#include "utils/resource_lock.hpp"
+#include "utils/stat.hpp"
namespace memgraph::storage {
diff --git a/src/telemetry/collectors.cpp b/src/telemetry/collectors.cpp
index db5517e3e..c36c6abf9 100644
--- a/src/telemetry/collectors.cpp
+++ b/src/telemetry/collectors.cpp
@@ -78,8 +78,12 @@ const nlohmann::json GetResourceUsage(std::filesystem::path root_directory) {
}
auto cpu_total = GetCpuUsage(pid);
cpu["usage"] = cpu_total.second;
-
- return {{"cpu", cpu}, {"memory", utils::GetMemoryRES()}, {"disk", utils::GetDirDiskUsage(root_directory)}};
+ const auto vm_max_map_count = utils::GetVmMaxMapCount();
+ return {{"cpu", cpu},
+ {"memory", utils::GetMemoryRES()},
+ {"disk", utils::GetDirDiskUsage(root_directory)},
+ {"vm_max_map_count",
+ vm_max_map_count.has_value() ? *vm_max_map_count : memgraph::utils::VM_MAX_MAP_COUNT_DEFAULT}};
}
} // namespace memgraph::telemetry
diff --git a/src/utils/stat.hpp b/src/utils/stat.hpp
index a14973fd7..7e4fab29b 100644
--- a/src/utils/stat.hpp
+++ b/src/utils/stat.hpp
@@ -11,7 +11,9 @@
#pragma once
+#include <cstddef>
#include <filesystem>
+#include <optional>
#include <unistd.h>
@@ -20,6 +22,8 @@
namespace memgraph::utils {
+static constexpr int64_t VM_MAX_MAP_COUNT_DEFAULT{-1};
+
/// Returns the number of bytes a directory is using on disk. If the given path
/// isn't a directory, zero will be returned.
template <bool IgnoreSymlink = true>
@@ -54,4 +58,20 @@ inline uint64_t GetMemoryRES() {
return memory;
}
+/// Returns the size of vm.max_map_count
+inline std::optional<int64_t> GetVmMaxMapCount() {
+ auto vm_max_map_count_data = utils::ReadLines("/proc/sys/vm/max_map_count");
+ if (vm_max_map_count_data.empty()) {
+ return std::nullopt;
+ }
+ if (vm_max_map_count_data.size() != 1) {
+ return std::nullopt;
+ }
+ const auto parts{utils::Split(vm_max_map_count_data[0])};
+ if (parts.size() != 1) {
+ return std::nullopt;
+ }
+ return std::stoi(parts[0]);
+}
+
} // namespace memgraph::utils
diff --git a/tests/e2e/configuration/storage_info.py b/tests/e2e/configuration/storage_info.py
index c73656ddb..042a57b08 100644
--- a/tests/e2e/configuration/storage_info.py
+++ b/tests/e2e/configuration/storage_info.py
@@ -53,10 +53,15 @@ def test_does_default_config_match():
config = cursor.fetchall()
# The default value of these is dependent on the given machine.
- machine_dependent_configurations = ["memory_res", "disk_usage", "memory_tracked", "allocation_limit"]
-
+ machine_dependent_configurations = [
+ "memory_res",
+ "disk_usage",
+ "memory_tracked",
+ "allocation_limit",
+ "vm_max_map_count",
+ ]
# Number of different data-points returned by SHOW STORAGE INFO
- assert len(config) == 12
+ assert len(config) == 13
for conf in config:
conf_name = conf[0]
diff --git a/tests/integration/telemetry/server.py b/tests/integration/telemetry/server.py
index f3c8450b0..3336c3588 100755
--- a/tests/integration/telemetry/server.py
+++ b/tests/integration/telemetry/server.py
@@ -148,6 +148,7 @@ def verify_storage(storage, args):
assert "cpu" in item["data"]["resources"]
assert "memory" in item["data"]["resources"]
assert "disk" in item["data"]["resources"]
+ assert "vm_max_map_count" in item["data"]["resources"]
assert "uptime" in item["data"]
uptime = item["data"]["uptime"]