diff --git a/canframemodel.cpp b/canframemodel.cpp
index c7f5ce1..cdcaa19 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -4,6 +4,7 @@
 #include <QApplication>
 #include <QPalette>
 #include <QDateTime>
+#include <QSettings>
 #include "utility.h"
 
 CANFrameModel::~CANFrameModel()
@@ -45,18 +46,21 @@ int CANFrameModel::columnCount(const QModelIndex &index) const
 CANFrameModel::CANFrameModel(QObject *parent)
     : QAbstractTableModel(parent)
 {
-
+    int maxFramesDefault;
     if (QSysInfo::WordSize > 32)
     {
         qDebug() << "64 bit OS detected. Requesting a large preallocation";
-        preallocSize = 10000000;
+        maxFramesDefault = 10000000;
     }
     else //if compiling for 32 bit you can't ask for gigabytes of preallocation so tone it down.
     {
         qDebug() << "32 bit OS detected. Requesting a much restricted prealloc";
-        preallocSize = 2000000;
+        maxFramesDefault = 2000000;
     }
 
+    QSettings settings;
+    preallocSize = settings.value("Main/MaximumFrames", maxFramesDefault).toInt();
+
     frames.reserve(preallocSize);
     filteredFrames.reserve(preallocSize); //the goal is to prevent a reallocation from ever happening
 
@@ -673,13 +677,31 @@ void CANFrameModel::addFrame(const CANFrame& frame, bool autoRefresh = false)
 
     if (!overwriteDups)
     {
-        frames.append(tempFrame);
-        if (filters[tempFrame.frameId()] && busFilters[tempFrame.bus])
+        bool alloc_ok = true;
+
+        for(int i=0; i<3; i++)
         {
-            if (autoRefresh) beginInsertRows(QModelIndex(), filteredFrames.count(), filteredFrames.count());
-            tempFrame.frameCount = 1;
-            filteredFrames.append(tempFrame);
-            if (autoRefresh) endInsertRows();
+            try
+            {
+                frames.append(tempFrame);
+                break;
+            }
+            catch (const std::exception& ex)
+            {
+                alloc_ok = false;
+                qDebug() << "addFrame failed to append.  frames.length(): " << frames.length() << " Exception: " << ex.what();
+            }
+        }
+
+        if(alloc_ok)
+        {
+            if (filters[tempFrame.frameId()] && busFilters[tempFrame.bus])
+            {
+                if (autoRefresh) beginInsertRows(QModelIndex(), filteredFrames.count(), filteredFrames.count());
+                tempFrame.frameCount = 1;
+                filteredFrames.append(tempFrame);
+                if (autoRefresh) endInsertRows();
+            }
         }
     }
     else //yes, overwrite dups
@@ -728,6 +750,20 @@ void CANFrameModel::addFrame(const CANFrame& frame, bool autoRefresh = false)
 
 void CANFrameModel::addFrames(const CANConnection*, const QVector<CANFrame>& pFrames)
 {
+    if(frames.length() > frames.capacity() * 0.99)
+    {
+        qDebug() << "Frames count: " << frames.length() << " of " << frames.capacity() << " capacity, removing first " << (int)(frames.capacity() * 0.05) << " frames";
+        frames.remove(0, (int)(frames.capacity() * 0.05));
+        qDebug() << "Frames removed, new count: " << frames.length();
+    }
+
+    if(filteredFrames.length() > filteredFrames.capacity() * 0.99)
+    {
+        qDebug() << "filteredFrames count: " << filteredFrames.length() << " of " << filteredFrames.capacity() << " capacity, removing first " << (int)(filteredFrames.capacity() * 0.05) << " frames";
+        filteredFrames.remove(0, (int)(filteredFrames.capacity() * 0.05));
+        qDebug() << "filteredFrames removed, new count: " << filteredFrames.length();
+    }
+
     foreach(const CANFrame& frame, pFrames)
     {
         addFrame(frame);
@@ -754,8 +790,8 @@ void CANFrameModel::sendRefresh()
     mutex.lock();
     beginResetModel();
     filteredFrames.clear();
-    filteredFrames.reserve(preallocSize);
     filteredFrames.append(tempContainer);
+    filteredFrames.reserve(preallocSize);
 
     lastUpdateNumFrames = 0;
     endResetModel();
diff --git a/mainsettingsdialog.cpp b/mainsettingsdialog.cpp
index 77bf257..2da44ed 100644
--- a/mainsettingsdialog.cpp
+++ b/mainsettingsdialog.cpp
@@ -90,6 +90,20 @@ MainSettingsDialog::MainSettingsDialog(QWidget *parent) :
     ui->cbFilterLabeling->setChecked(settings.value("Main/FilterLabeling", true).toBool());
     ui->cbIgnoreDBCColors->setChecked(settings.value("Main/IgnoreDBCColors", false).toBool());
 
+    int maxFramesDefault;
+    if (QSysInfo::WordSize > 32)
+    {
+        qDebug() << "64 bit OS detected. Requesting a large preallocation";
+        maxFramesDefault = 10000000;
+    }
+    else //if compiling for 32 bit you can't ask for gigabytes of preallocation so tone it down.
+    {
+        qDebug() << "32 bit OS detected. Requesting a much restricted prealloc";
+        maxFramesDefault = 2000000;
+    }
+
+    ui->spinMaximumFrames->setValue(settings.value("Main/MaximumFrames", maxFramesDefault).toInt());
+
     //just for simplicity they all call the same function and that function updates all settings at once
     connect(ui->cbDisplayHex, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->cbFlowAutoRef, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
@@ -117,6 +131,7 @@ MainSettingsDialog::MainSettingsDialog(QWidget *parent) :
     connect(ui->cbHexGraphFlow, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->cbHexGraphInfo, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->cbIgnoreDBCColors, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
+    connect(ui->spinMaximumFrames, SIGNAL(valueChanged(int)), this, SLOT(updateSettings()));
 
     installEventFilter(this);
 }
@@ -183,6 +198,7 @@ void MainSettingsDialog::updateSettings()
     settings.setValue("Remote/Pass", encPass);
     settings.setValue("Main/FilterLabeling", ui->cbFilterLabeling->isChecked());
     settings.setValue("Main/IgnoreDBCColors", ui->cbIgnoreDBCColors->isChecked());
+    settings.setValue("Main/MaximumFrames", ui->spinMaximumFrames->value());
 
     settings.sync();
     emit updatedSettings();
diff --git a/ui/mainsettingsdialog.ui b/ui/mainsettingsdialog.ui
index 586e4e0..d119b08 100644
--- a/ui/mainsettingsdialog.ui
+++ b/ui/mainsettingsdialog.ui
@@ -80,6 +80,39 @@
           </property>
          </widget>
         </item>
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout_6">
+          <property name="topMargin">
+           <number>0</number>
+          </property>
+          <property name="bottomMargin">
+           <number>0</number>
+          </property>
+          <item>
+           <widget class="QLabel" name="label_10">
+            <property name="text">
+             <string>Maximum Frames to Capture</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="QSpinBox" name="spinMaximumFrames">
+            <property name="minimum">
+             <number>100000</number>
+            </property>
+            <property name="maximum">
+             <number>1000000000</number>
+            </property>
+            <property name="singleStep">
+             <number>100000</number>
+            </property>
+            <property name="value">
+             <number>10000000</number>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
         <item>
          <widget class="QGroupBox" name="groupBox_6">
           <property name="title">