diff --git a/CCDB/include/CCDB/BasicCCDBManager.h b/CCDB/include/CCDB/BasicCCDBManager.h
index b76beb2576eb3..6ad645a0a893e 100644
--- a/CCDB/include/CCDB/BasicCCDBManager.h
+++ b/CCDB/include/CCDB/BasicCCDBManager.h
@@ -55,6 +55,7 @@ class CCDBManagerInstance
     long endvalidity = -1;
     long cacheValidFrom = 0;   // time for which the object was cached
     long cacheValidUntil = -1; // object is guaranteed to be valid till this time (modulo new updates)
+    size_t size = 0;
     size_t minSize = -1ULL;
     size_t maxSize = 0;
     int queries = 0;
@@ -229,6 +230,7 @@ class CCDBManagerInstance
   long mCreatedNotBefore = 0;                           // lower limit for object creation timestamp (TimeMachine mode) - If-Not-Before HTTP header
   long mTimerMS = 0;                                    // timer for queries
   size_t mFetchedSize = 0;                              // total fetched size
+  size_t mRequestedSize = 0;                            // total requested size (fetched + served from cache)
   int mQueries = 0;                                     // total number of object queries
   int mFetches = 0;                                     // total number of succesful fetches from CCDB
   int mFailures = 0;                                    // total number of failed fetches
@@ -258,6 +260,7 @@ T* CCDBManagerInstance::getForTimeStamp(std::string const& path, long timestamp,
       if (sh != mHeaders.end()) {
         size_t s = atol(sh->second.c_str());
         mFetchedSize += s;
+        mRequestedSize += s;
       }
     }
 
@@ -272,6 +275,7 @@ T* CCDBManagerInstance::getForTimeStamp(std::string const& path, long timestamp,
       if (headers) {
         *headers = cached.cacheOfHeaders;
       }
+      mRequestedSize += cached.size;
       return reinterpret_cast<T*>(cached.noCleanupPtr ? cached.noCleanupPtr : cached.objPtr.get());
     }
     ptr = mCCDBAccessor.retrieveFromTFileAny<T>(path, mMetaData, timestamp, &mHeaders, cached.uuid,
@@ -318,6 +322,8 @@ T* CCDBManagerInstance::getForTimeStamp(std::string const& path, long timestamp,
       if (sh != mHeaders.end()) {
         size_t s = atol(sh->second.c_str());
         mFetchedSize += s;
+        mRequestedSize += s;
+        cached.size = s;
         cached.minSize = std::min(s, cached.minSize);
         cached.maxSize = std::max(s, cached.minSize);
       }
@@ -342,12 +348,14 @@ T* CCDBManagerInstance::getForTimeStamp(std::string const& path, long timestamp,
   }
   auto end = std::chrono::system_clock::now();
   mTimerMS += std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count();
-  auto *ref = o2::framework::ServiceRegistryRef::globalDeviceRef();
+  auto* ref = o2::framework::ServiceRegistryRef::globalDeviceRef();
   if (ref && ref->active<framework::DataProcessingStats>()) {
     auto& stats = ref->get<o2::framework::DataProcessingStats>();
     stats.updateStats({(int)o2::framework::ProcessingStatsId::CCDB_CACHE_HIT, o2::framework::DataProcessingStats::Op::Set, (int64_t)mQueries - mFailures - mFetches});
     stats.updateStats({(int)o2::framework::ProcessingStatsId::CCDB_CACHE_MISS, o2::framework::DataProcessingStats::Op::Set, (int64_t)mFetches});
     stats.updateStats({(int)o2::framework::ProcessingStatsId::CCDB_CACHE_FAILURE, o2::framework::DataProcessingStats::Op::Set, (int64_t)mFailures});
+    stats.updateStats({(int)o2::framework::ProcessingStatsId::CCDB_CACHE_FETCHED_BYTES, o2::framework::DataProcessingStats::Op::Set, (int64_t)mFetchedSize});
+    stats.updateStats({(int)o2::framework::ProcessingStatsId::CCDB_CACHE_REQUESTED_BYTES, o2::framework::DataProcessingStats::Op::Set, (int64_t)mRequestedSize});
   }
   return ptr;
 }
diff --git a/CCDB/src/BasicCCDBManager.cxx b/CCDB/src/BasicCCDBManager.cxx
index d55fdad960d3a..53055d0d1231d 100644
--- a/CCDB/src/BasicCCDBManager.cxx
+++ b/CCDB/src/BasicCCDBManager.cxx
@@ -101,7 +101,7 @@ std::pair<int64_t, int64_t> CCDBManagerInstance::getRunDuration(int runnumber, b
 
 std::string CCDBManagerInstance::getSummaryString() const
 {
-  std::string res = fmt::format("{} queries, {} bytes", mQueries, fmt::group_digits(mFetchedSize));
+  std::string res = fmt::format("{} queries, {} fetched / {} requested bytes", mQueries, fmt::group_digits(mFetchedSize), fmt::group_digits(mRequestedSize));
   if (mCachingEnabled) {
     res += fmt::format(" for {} objects", mCache.size());
   }
diff --git a/Framework/CCDBSupport/src/AnalysisCCDBHelpers.cxx b/Framework/CCDBSupport/src/AnalysisCCDBHelpers.cxx
index 413adfddecf04..3892f200645f6 100644
--- a/Framework/CCDBSupport/src/AnalysisCCDBHelpers.cxx
+++ b/Framework/CCDBSupport/src/AnalysisCCDBHelpers.cxx
@@ -11,6 +11,7 @@
 
 #include "AnalysisCCDBHelpers.h"
 #include "CCDBFetcherHelper.h"
+#include "Framework/DataProcessingStats.h"
 #include "Framework/DeviceSpec.h"
 #include "Framework/TimingInfo.h"
 #include "Framework/ConfigParamRegistry.h"
@@ -105,7 +106,7 @@ AlgorithmSpec AnalysisCCDBHelpers::fetchFromCCDB(ConfigContext const& /*ctx*/)
     std::unordered_map<std::string, int> bindings;
     fillValidRoutes(*helper, spec.outputs, bindings);
 
-    return adaptStateless([schemas, bindings, helper](InputRecord& inputs, DataTakingContext& dtc, DataAllocator& allocator, TimingInfo& timingInfo) {
+    return adaptStateless([schemas, bindings, helper](InputRecord& inputs, DataTakingContext& dtc, DataAllocator& allocator, TimingInfo& timingInfo, DataProcessingStats& stats) {
       O2_SIGNPOST_ID_GENERATE(sid, ccdb);
       O2_SIGNPOST_START(ccdb, sid, "fetchFromAnalysisCCDB", "Fetching CCDB objects for analysis%" PRIu64, (uint64_t)timingInfo.timeslice);
       for (auto& schema : schemas) {
@@ -182,6 +183,8 @@ AlgorithmSpec AnalysisCCDBHelpers::fetchFromCCDB(ConfigContext const& /*ctx*/)
         allocator.adopt(Output{concrete.origin, concrete.description, concrete.subSpec}, outTable);
       }
 
+      stats.updateStats({(int)ProcessingStatsId::CCDB_CACHE_FETCHED_BYTES, DataProcessingStats::Op::Set, (int64_t)helper->totalFetchedBytes});
+      stats.updateStats({(int)ProcessingStatsId::CCDB_CACHE_REQUESTED_BYTES, DataProcessingStats::Op::Set, (int64_t)helper->totalRequestedBytes});
       O2_SIGNPOST_END(ccdb, sid, "fetchFromAnalysisCCDB", "Fetching CCDB objects");
     });
   });
diff --git a/Framework/CCDBSupport/src/CCDBFetcherHelper.cxx b/Framework/CCDBSupport/src/CCDBFetcherHelper.cxx
index 151703105a1dd..8d50dac63a67b 100644
--- a/Framework/CCDBSupport/src/CCDBFetcherHelper.cxx
+++ b/Framework/CCDBSupport/src/CCDBFetcherHelper.cxx
@@ -254,6 +254,8 @@ auto CCDBFetcherHelper::populateCacheWith(std::shared_ptr<CCDBFetcherHelper> con
         helper->mapURL2UUID[path].minSize = std::min(v.size(), helper->mapURL2UUID[path].minSize);
         helper->mapURL2UUID[path].maxSize = std::max(v.size(), helper->mapURL2UUID[path].maxSize);
         auto size = v.size();
+        helper->totalFetchedBytes += size;
+        helper->totalRequestedBytes += size;
         api.appendFlatHeader(v, headers);
         auto cacheId = allocator.adoptContainer(output, std::move(v), DataAllocator::CacheStrategy::Always, header::gSerializationMethodCCDB);
         helper->mapURL2DPLCache[path] = cacheId;
@@ -271,6 +273,8 @@ auto CCDBFetcherHelper::populateCacheWith(std::shared_ptr<CCDBFetcherHelper> con
         helper->mapURL2UUID[path].minSize = std::min(v.size(), helper->mapURL2UUID[path].minSize);
         helper->mapURL2UUID[path].maxSize = std::max(v.size(), helper->mapURL2UUID[path].maxSize);
         auto size = v.size();
+        helper->totalFetchedBytes += size;
+        helper->totalRequestedBytes += size;
         api.appendFlatHeader(v, headers);
         auto cacheId = allocator.adoptContainer(output, std::move(v), DataAllocator::CacheStrategy::Always, header::gSerializationMethodCCDB);
         helper->mapURL2DPLCache[path] = cacheId;
diff --git a/Framework/CCDBSupport/src/CCDBFetcherHelper.h b/Framework/CCDBSupport/src/CCDBFetcherHelper.h
index 1778712f45002..a6cb3f70215af 100644
--- a/Framework/CCDBSupport/src/CCDBFetcherHelper.h
+++ b/Framework/CCDBSupport/src/CCDBFetcherHelper.h
@@ -84,6 +84,8 @@ struct CCDBFetcherHelper {
 
   static ParserResult parseRemappings(char const*);
 
+  size_t totalFetchedBytes = 0;
+  size_t totalRequestedBytes = 0;
   std::unordered_map<std::string, CCDBCacheInfo> mapURL2UUID;
   std::unordered_map<std::string, DataAllocator::CacheId> mapURL2DPLCache;
   std::string createdNotBefore = "0";
diff --git a/Framework/CCDBSupport/src/CCDBHelpers.cxx b/Framework/CCDBSupport/src/CCDBHelpers.cxx
index 80a79796f8c1b..fd78594e365bf 100644
--- a/Framework/CCDBSupport/src/CCDBHelpers.cxx
+++ b/Framework/CCDBSupport/src/CCDBHelpers.cxx
@@ -11,6 +11,7 @@
 
 #include "CCDBHelpers.h"
 #include "Framework/DeviceSpec.h"
+#include "Framework/DataProcessingStats.h"
 #include "Framework/Logger.h"
 #include "Framework/TimingInfo.h"
 #include "Framework/ConfigParamRegistry.h"
@@ -28,7 +29,8 @@ O2_DECLARE_DYNAMIC_LOG(ccdb);
 namespace o2::framework
 {
 
-namespace {
+namespace
+{
 struct CCDBFetcherHelper {
   struct CCDBCacheInfo {
     std::string etag;
@@ -36,6 +38,7 @@ struct CCDBFetcherHelper {
     size_t cachePopulatedAt = 0;
     size_t cacheMiss = 0;
     size_t cacheHit = 0;
+    size_t size = 0;
     size_t minSize = -1ULL;
     size_t maxSize = 0;
     int lastCheckedTF = 0;
@@ -50,6 +53,8 @@ struct CCDBFetcherHelper {
     std::string url;
   };
 
+  size_t totalFetchedBytes = 0;
+  size_t totalRequestedBytes = 0;
   std::unordered_map<std::string, CCDBCacheInfo> mapURL2UUID;
   std::unordered_map<std::string, DataAllocator::CacheId> mapURL2DPLCache;
   std::string createdNotBefore = "0";
@@ -80,7 +85,7 @@ struct CCDBFetcherHelper {
     return apis[entry == remappings.end() ? "" : entry->second];
   }
 };
-}
+} // namespace
 
 bool isPrefix(std::string_view prefix, std::string_view full)
 {
@@ -336,8 +341,11 @@ auto populateCacheWith(std::shared_ptr<CCDBFetcherHelper> const& helper,
         helper->mapURL2UUID[path].etag = headers["ETag"]; // update uuid
         helper->mapURL2UUID[path].cachePopulatedAt = timestampToUse;
         helper->mapURL2UUID[path].cacheMiss++;
+        helper->mapURL2UUID[path].size = v.size();
         helper->mapURL2UUID[path].minSize = std::min(v.size(), helper->mapURL2UUID[path].minSize);
         helper->mapURL2UUID[path].maxSize = std::max(v.size(), helper->mapURL2UUID[path].maxSize);
+        helper->totalFetchedBytes += v.size();
+        helper->totalRequestedBytes += v.size();
         api.appendFlatHeader(v, headers);
         auto cacheId = allocator.adoptContainer(output, std::move(v), DataAllocator::CacheStrategy::Always, header::gSerializationMethodCCDB);
         helper->mapURL2DPLCache[path] = cacheId;
@@ -350,8 +358,11 @@ auto populateCacheWith(std::shared_ptr<CCDBFetcherHelper> const& helper,
         helper->mapURL2UUID[path].cachePopulatedAt = timestampToUse;
         helper->mapURL2UUID[path].cacheValidUntil = headers["Cache-Valid-Until"].empty() ? 0 : std::stoul(headers["Cache-Valid-Until"]);
         helper->mapURL2UUID[path].cacheMiss++;
+        helper->mapURL2UUID[path].size = v.size();
         helper->mapURL2UUID[path].minSize = std::min(v.size(), helper->mapURL2UUID[path].minSize);
         helper->mapURL2UUID[path].maxSize = std::max(v.size(), helper->mapURL2UUID[path].maxSize);
+        helper->totalFetchedBytes += v.size();
+        helper->totalRequestedBytes += v.size();
         api.appendFlatHeader(v, headers);
         auto cacheId = allocator.adoptContainer(output, std::move(v), DataAllocator::CacheStrategy::Always, header::gSerializationMethodCCDB);
         helper->mapURL2DPLCache[path] = cacheId;
@@ -368,6 +379,7 @@ auto populateCacheWith(std::shared_ptr<CCDBFetcherHelper> const& helper,
     auto cacheId = helper->mapURL2DPLCache[path];
     O2_SIGNPOST_EVENT_EMIT(ccdb, sid, "populateCacheWith", "Reusing %{public}s for %{public}s (DPL id %" PRIu64 ")", path.data(), headers["ETag"].data(), cacheId.value);
     helper->mapURL2UUID[path].cacheHit++;
+    helper->totalRequestedBytes += helper->mapURL2UUID[path].size;
     allocator.adoptFromCache(output, cacheId, header::gSerializationMethodCCDB);
     // the outputBuffer was not used, can we destroy it?
   }
@@ -382,13 +394,13 @@ AlgorithmSpec CCDBHelpers::fetchFromCCDB()
       /// Add a callback on stop which dumps the statistics for the caching per
       /// path
       callbacks.set<CallbackService::Id::Stop>([helper]() {
-        LOGP(info, "CCDB cache miss/hit ratio:");
+        LOGP(info, "CCDB cache miss/hit ratio ({} fetched / {} requested bytes):", helper->totalFetchedBytes, helper->totalRequestedBytes);
         for (auto& entry : helper->mapURL2UUID) {
           LOGP(info, "  {}: {}/{} ({}-{} bytes)", entry.first, entry.second.cacheMiss, entry.second.cacheHit, entry.second.minSize, entry.second.maxSize);
         }
       });
 
-      return adaptStateless([helper](DataTakingContext& dtc, DataAllocator& allocator, TimingInfo& timingInfo) {
+      return adaptStateless([helper](DataTakingContext& dtc, DataAllocator& allocator, TimingInfo& timingInfo, DataProcessingStats& stats) {
         auto sid = _o2_signpost_id_t{(int64_t)timingInfo.timeslice};
         O2_SIGNPOST_START(ccdb, sid, "fetchFromCCDB", "Fetching CCDB objects for timeslice %" PRIu64, (uint64_t)timingInfo.timeslice);
         static Long64_t orbitResetTime = -1;
@@ -429,8 +441,11 @@ AlgorithmSpec CCDBHelpers::fetchFromCCDB()
             if (etag.empty()) {
               helper->mapURL2UUID[path].etag = headers["ETag"]; // update uuid
               helper->mapURL2UUID[path].cacheMiss++;
+              helper->mapURL2UUID[path].size = v.size();
               helper->mapURL2UUID[path].minSize = std::min(v.size(), helper->mapURL2UUID[path].minSize);
               helper->mapURL2UUID[path].maxSize = std::max(v.size(), helper->mapURL2UUID[path].maxSize);
+              helper->totalFetchedBytes += v.size();
+              helper->totalRequestedBytes += v.size();
               newOrbitResetTime = getOrbitResetTime(v);
               api.appendFlatHeader(v, headers);
               auto cacheId = allocator.adoptContainer(output, std::move(v), DataAllocator::CacheStrategy::Always, header::gSerializationMethodNone);
@@ -440,8 +455,11 @@ AlgorithmSpec CCDBHelpers::fetchFromCCDB()
               // somewhere here pruneFromCache should be called
               helper->mapURL2UUID[path].etag = headers["ETag"]; // update uuid
               helper->mapURL2UUID[path].cacheMiss++;
+              helper->mapURL2UUID[path].size = v.size();
               helper->mapURL2UUID[path].minSize = std::min(v.size(), helper->mapURL2UUID[path].minSize);
               helper->mapURL2UUID[path].maxSize = std::max(v.size(), helper->mapURL2UUID[path].maxSize);
+              helper->totalFetchedBytes += v.size();
+              helper->totalRequestedBytes += v.size();
               newOrbitResetTime = getOrbitResetTime(v);
               api.appendFlatHeader(v, headers);
               auto cacheId = allocator.adoptContainer(output, std::move(v), DataAllocator::CacheStrategy::Always, header::gSerializationMethodNone);
@@ -455,6 +473,7 @@ AlgorithmSpec CCDBHelpers::fetchFromCCDB()
           auto cacheId = helper->mapURL2DPLCache[path];
           O2_SIGNPOST_EVENT_EMIT(ccdb, sid, "fetchFromCCDB", "Reusing %{public}s for %{public}s (DPL id %" PRIu64 ")", path.data(), headers["ETag"].data(), cacheId.value);
           helper->mapURL2UUID[path].cacheHit++;
+          helper->totalRequestedBytes += helper->mapURL2UUID[path].size;
           allocator.adoptFromCache(output, cacheId, header::gSerializationMethodNone);
 
           if (newOrbitResetTime != orbitResetTime) {
@@ -480,6 +499,8 @@ AlgorithmSpec CCDBHelpers::fetchFromCCDB()
             dtc.runNumber.data(), orbitResetTime, timingInfo.creation, timestamp, timingInfo.firstTForbit);
 
         populateCacheWith(helper, timestamp, timingInfo, dtc, allocator);
+        stats.updateStats({(int)ProcessingStatsId::CCDB_CACHE_FETCHED_BYTES, DataProcessingStats::Op::Set, (int64_t)helper->totalFetchedBytes});
+        stats.updateStats({(int)ProcessingStatsId::CCDB_CACHE_REQUESTED_BYTES, DataProcessingStats::Op::Set, (int64_t)helper->totalRequestedBytes});
         O2_SIGNPOST_END(ccdb, _o2_signpost_id_t{(int64_t)timingInfo.timeslice}, "fetchFromCCDB", "Fetching CCDB objects");
       }); });
 }
diff --git a/Framework/Core/include/Framework/DataProcessingStats.h b/Framework/Core/include/Framework/DataProcessingStats.h
index a1f5c0eec5568..edb04c4c5f752 100644
--- a/Framework/Core/include/Framework/DataProcessingStats.h
+++ b/Framework/Core/include/Framework/DataProcessingStats.h
@@ -72,6 +72,8 @@ enum struct ProcessingStatsId : short {
   CCDB_CACHE_HIT,
   CCDB_CACHE_MISS,
   CCDB_CACHE_FAILURE,
+  CCDB_CACHE_FETCHED_BYTES,
+  CCDB_CACHE_REQUESTED_BYTES,
   AVAILABLE_MANAGED_SHM_BASE = 512,
 };
 
diff --git a/Framework/Core/src/CommonServices.cxx b/Framework/Core/src/CommonServices.cxx
index 06bc7969ebf1e..0f53f5a6be5a1 100644
--- a/Framework/Core/src/CommonServices.cxx
+++ b/Framework/Core/src/CommonServices.cxx
@@ -1176,6 +1176,22 @@ o2::framework::ServiceSpec CommonServices::dataProcessingStats()
                    .scope = Scope::DPL,
                    .minPublishInterval = 1000,
                    .maxRefreshLatency = 10000,
+                   .sendInitialValue = true},
+        MetricSpec{.name = "ccdb-cache-fetched-bytes",
+                   .enabled = true,
+                   .metricId = static_cast<short>(ProcessingStatsId::CCDB_CACHE_FETCHED_BYTES),
+                   .kind = Kind::UInt64,
+                   .scope = Scope::DPL,
+                   .minPublishInterval = 1000,
+                   .maxRefreshLatency = 10000,
+                   .sendInitialValue = true},
+        MetricSpec{.name = "ccdb-cache-requested-bytes",
+                   .enabled = true,
+                   .metricId = static_cast<short>(ProcessingStatsId::CCDB_CACHE_REQUESTED_BYTES),
+                   .kind = Kind::UInt64,
+                   .scope = Scope::DPL,
+                   .minPublishInterval = 1000,
+                   .maxRefreshLatency = 10000,
                    .sendInitialValue = true}};
 
       for (auto& metric : metrics) {