diff --git a/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/JobDetailsPage.java b/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/JobDetailsPage.java
index 8d244e8..585c7a1 100644
--- a/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/JobDetailsPage.java
+++ b/hyracks-control-cc/src/main/java/edu/uci/ics/hyracks/control/cc/adminconsole/pages/JobDetailsPage.java
@@ -244,13 +244,18 @@
                                         .append("\" width=\"1\" height=\"")
                                         .append(HEIGHT / 2)
                                         .append("\" style=\"fill:rgb(255,0,0);stroke-width:1;stroke:rgb(255,0,0)\"/>\n");
-                                for (long ft : tp.frameTimes) {
+                                for (int l = 0; l < tp.frameTimes.length; ++l) {
+                                    long ft = tp.frameTimes[l];
+                                    long ftn = l < tp.frameTimes.length - 1 ? tp.frameTimes[l + 1] : ft;
                                     long taNextTime = ft - minTime;
+                                    long barWidth = ftn - ft;
                                     buffer.append("<rect x=\"")
                                             .append(taNextTime * width + leftOffset)
                                             .append("\" y=\"")
                                             .append(y * (HEIGHT + 1) + HEIGHT / 4)
-                                            .append("\" width=\"1\" height=\"")
+                                            .append("\" width=\"")
+                                            .append(barWidth == 0 ? 1 : (barWidth * width))
+                                            .append("\" height=\"")
                                             .append(HEIGHT / 2)
                                             .append("\" style=\"fill:rgb(0,255,0);stroke-width:1;stroke:rgb(0,255,0)\"/>\n");
                                 }
diff --git a/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/profiling/ProfilingPartitionWriterFactory.java b/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/profiling/ProfilingPartitionWriterFactory.java
index c7b3bd8..affa01c 100644
--- a/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/profiling/ProfilingPartitionWriterFactory.java
+++ b/hyracks-control-nc/src/main/java/edu/uci/ics/hyracks/control/nc/profiling/ProfilingPartitionWriterFactory.java
@@ -27,7 +27,7 @@
 import edu.uci.ics.hyracks.control.nc.Task;
 
 public class ProfilingPartitionWriterFactory implements IPartitionWriterFactory {
-    private static final int N_SAMPLES = 1024;
+    private static final int N_SAMPLES = 64;
 
     private final IHyracksTaskContext ctx;
 
diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/partition/FieldHashPartitionComputerFactory.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/partition/FieldHashPartitionComputerFactory.java
index 8d69b95..26bf75b 100644
--- a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/partition/FieldHashPartitionComputerFactory.java
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/partition/FieldHashPartitionComputerFactory.java
@@ -39,6 +39,9 @@
         return new ITuplePartitionComputer() {
             @Override
             public int partition(IFrameTupleAccessor accessor, int tIndex, int nParts) {
+                if (nParts == 1) {
+                    return 0;
+                }
                 int h = 0;
                 int startOffset = accessor.getTupleStartOffset(tIndex);
                 int slotLength = accessor.getFieldSlotsLength();