Index: oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/file/AbstractFileStore.java
===================================================================
--- oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/file/AbstractFileStore.java	(revision 1814707)
+++ oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/file/AbstractFileStore.java	(working copy)
@@ -29,6 +29,7 @@
 import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import javax.annotation.CheckForNull;
 import javax.annotation.Nonnull;
@@ -129,11 +130,20 @@
 
     protected final IOMonitor ioMonitor;
 
+    static final AtomicInteger dataSegmentIdAllocations = new AtomicInteger();
+
+    static final AtomicInteger bulkSegmentIdAllocations = new AtomicInteger();
+
     AbstractFileStore(final FileStoreBuilder builder) {
         this.directory = builder.getDirectory();
         this.tracker = new SegmentTracker(new SegmentIdFactory() {
             @Override @Nonnull
             public SegmentId newSegmentId(long msb, long lsb) {
+                if (SegmentId.isDataSegmentId(lsb)) {
+                    dataSegmentIdAllocations.incrementAndGet();
+                } else {
+                    bulkSegmentIdAllocations.incrementAndGet();
+                }
                 return new SegmentId(AbstractFileStore.this, msb, lsb, segmentCache::recordHit);
             }
         });
Index: oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java
===================================================================
--- oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java	(revision 1814707)
+++ oak-segment-tar/src/main/java/org/apache/jackrabbit/oak/segment/file/FileStore.java	(working copy)
@@ -59,6 +59,7 @@
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.function.Consumer;
 
@@ -164,6 +165,14 @@
     @Nonnull
     private final SegmentNotFoundExceptionListener snfeListener;
 
+    private static final AtomicInteger uncachedDataSegmentReads = new AtomicInteger();
+
+    private static final AtomicInteger uncachedBulkSegmentReads = new AtomicInteger();
+
+    private static final AtomicInteger writtenDataSegments = new AtomicInteger();
+
+    private static final AtomicInteger writtenBulkSegments = new AtomicInteger();
+
     FileStore(final FileStoreBuilder builder) throws InvalidFileStoreVersionException, IOException {
         super(builder);
 
@@ -477,6 +486,12 @@
         fileReaper.reap();
 
         log.info("TarMK closed: {}", directory);
+        log.info("TarMK data segment ID allocations: {}", dataSegmentIdAllocations);
+        log.info("TarMK bulk segment ID allocations: {}", bulkSegmentIdAllocations);
+        log.info("TarMK uncached data segment reads: {}", uncachedDataSegmentReads);
+        log.info("TarMK uncached bulk segment reads: {}", uncachedBulkSegmentReads);
+        log.info("TarMK written data segments......: {}", writtenDataSegments);
+        log.info("TarMK written bulk segments......: {}", writtenBulkSegments);
     }
 
     @Override
@@ -490,7 +505,14 @@
     @Nonnull
     public Segment readSegment(final SegmentId id) {
         try (ShutDownCloser ignored = shutDown.keepAlive()) {
-            return segmentCache.getSegment(id, () -> readSegmentUncached(tarFiles, id));
+            return segmentCache.getSegment(id, () -> {
+                if (id.isDataSegmentId()) {
+                    uncachedDataSegmentReads.incrementAndGet();
+                } else {
+                    uncachedBulkSegmentReads.incrementAndGet();
+                }
+                return readSegmentUncached(tarFiles, id);
+            });
         } catch (ExecutionException e) {
             SegmentNotFoundException snfe = asSegmentNotFoundException(e, id);
             snfeListener.notify(id, snfe);
@@ -526,6 +548,10 @@
                 generation = segment.getGcGeneration();
                 references = readReferences(segment);
                 binaryReferences = readBinaryReferences(segment);
+
+                writtenDataSegments.incrementAndGet();
+            } else {
+                writtenBulkSegments.incrementAndGet();
             }
 
             tarFiles.writeSegment(