diff --git a/frontend/common/RepackLsResponseStream.cpp b/frontend/common/RepackLsResponseStream.cpp
index f961e7901f79dab91793a0db366cf3972c8ec747..eec41272e916767fd8617161926bf1a8cd3c4c6d 100644
--- a/frontend/common/RepackLsResponseStream.cpp
+++ b/frontend/common/RepackLsResponseStream.cpp
@@ -114,7 +114,7 @@ void RepackLsResponseStream::collectRepacks(const std::optional<std::string>& vi
     repackRequestItem->set_last_expanded_fseq(repackRequest.lastExpandedFseq != 0 ? repackRequest.lastExpandedFseq - 1 :
                                                                                     0);
     repackRequestItem->mutable_destination_infos()->Clear();
-    for (auto destinationInfo : repackRequest.destinationInfos) {
+    for (const auto& destinationInfo : repackRequest.destinationInfos) {
       auto* destinationInfoToInsert = repackRequestItem->mutable_destination_infos()->Add();
       destinationInfoToInsert->set_vid(destinationInfo.vid);
       destinationInfoToInsert->set_files(destinationInfo.files);
diff --git a/frontend/grpc/callback_api/CtaAdminClientReadReactor.hpp b/frontend/grpc/callback_api/CtaAdminClientReadReactor.hpp
index 484e955d8d2c301ed7b7b49aa970c18481252165..42d847529ffe9db031b9dc506ca4e300e9fe66f6 100644
--- a/frontend/grpc/callback_api/CtaAdminClientReadReactor.hpp
+++ b/frontend/grpc/callback_api/CtaAdminClientReadReactor.hpp
@@ -243,7 +243,7 @@ public:
   }
 
   CtaAdminClientReadReactor(cta::xrd::CtaRpcStream::Stub* client_stub, const cta::admin::CtaAdminParsedCmd& parsedCmd) {
-    const auto request = parsedCmd.getRequest();
+    const auto& request = parsedCmd.getRequest();
     client_stub->async()->GenericAdminStream(&m_context, &request, this);
     m_isJson = parsedCmd.isJson();
     StartRead(&m_response);  // where to store the received response?
diff --git a/objectstore/ArchiveFileSerDeser.hpp b/objectstore/ArchiveFileSerDeser.hpp
index ca6139665e9ffc19039c808b2280e37b3db06386..9460ba9baad8cfb4991e3f68a90bc08f6f6d1d67 100644
--- a/objectstore/ArchiveFileSerDeser.hpp
+++ b/objectstore/ArchiveFileSerDeser.hpp
@@ -67,7 +67,7 @@ public:
     fileSize=osaf.filesize();
     reconciliationTime=osaf.reconciliationtime();
     storageClass=osaf.storageclass();
-    for (auto tf: osaf.tapefiles()) {
+    for (const auto& tf : osaf.tapefiles()) {
       TapeFileSerDeser tfsd;
       tfsd.deserialize(tf);
       tapeFiles.push_back(tfsd);
diff --git a/objectstore/ArchiveQueueShard.cpp b/objectstore/ArchiveQueueShard.cpp
index 92db0391e216286259fe20e6eb36bc0667e28d50..cfb7f8e73714b479cfd97039c99fb6cd3de0b3ed 100644
--- a/objectstore/ArchiveQueueShard.cpp
+++ b/objectstore/ArchiveQueueShard.cpp
@@ -41,7 +41,7 @@ ArchiveQueueShard::ArchiveQueueShard(GenericObject& go):
 void ArchiveQueueShard::rebuild() {
   checkPayloadWritable();
   uint64_t totalSize=0;
-  for (auto j: m_payload.archivejobs()) {
+  for (const auto& j : m_payload.archivejobs()) {
     totalSize += j.size();
   }
   m_payload.set_archivejobstotalsize(totalSize);
diff --git a/scheduler/RetrieveMount.cpp b/scheduler/RetrieveMount.cpp
index a4b4d144d592a0c02874a1fe1859d8d8d97bab68..c5bba71889b124387cac017110b3f1edc45afda9 100644
--- a/scheduler/RetrieveMount.cpp
+++ b/scheduler/RetrieveMount.cpp
@@ -285,7 +285,7 @@ bool cta::RetrieveMount::checkOrReserveFreeDiskSpaceForRequest(const cta::DiskSp
     uint64_t previousDrivesReservationTotal = 0;
     auto diskSystem = diskSystemFreeSpace.getDiskSystemList().at(ds);
     // Compute previous drives reservation for the physical space of the current disk system.
-    for (auto previousDriveReservation : previousDrivesReservations) {
+    for (const auto& previousDriveReservation : previousDrivesReservations) {
       //avoid empty string when no disk space reservation exists for drive
       if (previousDriveReservation.second != 0) {
         auto previousDiskSystem = diskSystemFreeSpace.getDiskSystemList().at(previousDriveReservation.first);
diff --git a/scheduler/Scheduler.cpp b/scheduler/Scheduler.cpp
index 888de3a90308164229ac24a1cbdbadb5b25bc963..0c6d4ed34458ef9ac27ecd4827fdf79b6c04eb20 100644
--- a/scheduler/Scheduler.cpp
+++ b/scheduler/Scheduler.cpp
@@ -2793,7 +2793,7 @@ void Scheduler::triggerTapeStateChange(const common::dataStructures::SecurityIde
   // Validate tape state change based on previous state
   auto tape_meta_data = m_catalogue.Tape()->getTapesByVid(vid)[vid];
   auto prev_state = tape_meta_data.state;
-  auto prev_reason = tape_meta_data.stateReason;
+  const auto& prev_reason = tape_meta_data.stateReason;
   // User is not allowed to select explicitly a temporary state
   if (new_state == Tape::BROKEN_PENDING || new_state == Tape::EXPORTED_PENDING ||
       new_state == Tape::REPACKING_PENDING) {
diff --git a/statistics/Statistics.cpp b/statistics/Statistics.cpp
index b58b56ad40f16327826512fda168f797e3850ec3..da169e841227c93f38b2385c9563546cff42f165 100644
--- a/statistics/Statistics.cpp
+++ b/statistics/Statistics.cpp
@@ -84,7 +84,7 @@ std::unique_ptr<Statistics> Statistics::Builder::build(cta::rdbms::Rset* rset) {
 std::ostream & operator <<(std::ostream& stream, const Statistics& stats) {
   stream << "{"
          << "\"statisticsPerVo\": [";
-  auto allVoStatistics = stats.getAllVOStatistics();
+  const auto& allVoStatistics = stats.getAllVOStatistics();
   uint64_t nbElementsVoStatistics = allVoStatistics.size();
   uint64_t i = 0;
   for (auto & stat : allVoStatistics) {