diff --git a/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/RowSetCounts.java b/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/RowSetCounts.java
index 31567423535..bb3835cb551 100644
--- a/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/RowSetCounts.java
+++ b/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/RowSetCounts.java
@@ -51,6 +51,9 @@ public final class RowSetCounts {
     public final LongCounterMetric rspTwoValuesContainerCount;
     public final LongCounterMetric rspSingletonContainersCount;
 
+    public final LongCounterLog2HistogramMetric rspFullBlockSpansCount;
+    public final LongCounterLog2HistogramMetric rspFullBlockSpansLen;
+
     public RowSetCounts(final String prefix) {
         emptyCount =
                 new IntCounterMetric(prefix + "EmptyCount");
@@ -121,6 +124,11 @@ public RowSetCounts(final String prefix) {
 
         rspSingletonContainersCount =
                 new LongCounterMetric(prefix + "RspSingletonContainersCount");
+
+        rspFullBlockSpansCount =
+                new LongCounterLog2HistogramMetric(prefix + "RspFullBlockSpansCount");
+        rspFullBlockSpansLen =
+                new LongCounterLog2HistogramMetric(prefix + "RspFullBlockSpansLen");
     }
 
     public void sampleRsp(final RspBitmap rb) {
@@ -148,7 +156,9 @@ public void sampleRsp(final RspBitmap rb) {
                 rspSingleRangeContainersCount,
                 rspSingleRangeContainerCardinality,
                 rspSingletonContainersCount,
-                rspTwoValuesContainerCount);
+                rspTwoValuesContainerCount,
+                rspFullBlockSpansCount,
+                rspFullBlockSpansLen);
     }
 
     public void sampleSingleRange(final SingleRange sr) {
diff --git a/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/rsp/RspArray.java b/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/rsp/RspArray.java
index 5747918f3d4..13112e1cbfd 100644
--- a/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/rsp/RspArray.java
+++ b/engine/rowset/src/main/java/io/deephaven/engine/rowset/impl/rsp/RspArray.java
@@ -4824,11 +4824,15 @@ public void sampleMetrics(
             final LongConsumer singleRangeContainersCount,
             final LongConsumer singleRangeContainerCardinality,
             final LongConsumer singletonContainersCount,
-            final LongConsumer twoValuesContainerCount) {
+            final LongConsumer twoValuesContainerCount,
+            final LongConsumer fullBlockSpansCount,
+            final LongConsumer fullBlockSpansLen) {
         rspParallelArraysSizeUsed.accept(size);
         rspParallelArraysSizeUnused.accept(spanInfos.length - size);
         // TODO: It would be much more efficient to accumulate multiple samples (perhaps one array of them per Metric),
         // and then provide them to the metric in one call, to prevent multiple volatile assignments.
+        long fullBlockSpansCountAcc = 0;
+        long fullBlockSpansLenAcc = 0;
         for (int i = 0; i < size; ++i) {
             final Object o = spans[i];
             if (isSingletonSpan(o)) {
@@ -4844,7 +4848,9 @@ public void sampleMetrics(
                 arrayContainersBytesUnused.accept(allocated - card);
                 continue;
             }
-            if (!(o instanceof Container)) {
+            if (!(o instanceof Container)) { // full block span
+                ++fullBlockSpansCountAcc;
+                fullBlockSpansLenAcc += getFullBlockSpanLen(spanInfos[i], o);
                 continue;
             }
             final Container c = (Container) o;
@@ -4876,6 +4882,8 @@ public void sampleMetrics(
                 throw new IllegalStateException("unknown Container subtype");
             }
         }
+        fullBlockSpansCount.accept(fullBlockSpansCountAcc);
+        fullBlockSpansLen.accept(fullBlockSpansLenAcc);
     }
 
     // Returns null if we can't compact.