diff --git a/cpp/registry/BlockServiceFileTracker.cpp b/cpp/registry/BlockServiceFileTracker.cpp
index 1210c6be..7bf3a0d3 100644
--- a/cpp/registry/BlockServiceFileTracker.cpp
+++ b/cpp/registry/BlockServiceFileTracker.cpp
@@ -76,6 +76,11 @@ void BlockServiceFileTracker::_processResponses() {
 
 void BlockServiceFileTracker::_scanBlockServices() {
     if (_blockServiceState.empty() && _pendingBlockServices.empty()) {
+        auto now = ternNow();
+        if (now - _lastScanCycleComplete < MIN_SCAN_CYCLE_INTERVAL) {
+            return;
+        }
+        _lastScanCycleComplete = now;
         LOG_INFO(_env, "Scanning for block services to track");
         _registryDB.blockServices(_pendingBlockServices);
     }
diff --git a/cpp/registry/BlockServiceFileTracker.hpp b/cpp/registry/BlockServiceFileTracker.hpp
index 1e65d647..ae8739ad 100644
--- a/cpp/registry/BlockServiceFileTracker.hpp
+++ b/cpp/registry/BlockServiceFileTracker.hpp
@@ -28,6 +28,7 @@ public:
     static constexpr uint32_t MAX_BLOCK_SERVICE_SCAN = 128;
     static constexpr uint32_t MAX_SHARD_RESPONSES = 2*MAX_BLOCK_SERVICE_SCAN;
     static constexpr Duration SHARD_RETRY_TIMEOUT = 1_sec;
+    static constexpr Duration MIN_SCAN_CYCLE_INTERVAL = 15_mins;
 
     BlockServiceFileTracker(Logger& logger, std::shared_ptr<XmonAgent>& xmon, const RegistryOptions& options, RegistryDB& db, RegistryServer& server, RegistryWriter& writer);
 
@@ -51,6 +52,7 @@ private:
     std::unordered_map<BlockServiceId, BlockServiceStatus> _blockServiceState;
     std::vector<FullBlockServiceInfo> _pendingBlockServices;
     ShardId _currentShardIndex = 0;
+    TernTime _lastScanCycleComplete = 0;
 
     void _processResponses();
     void _scanBlockServices();