diff --git a/src/tests/db/Db.pro b/src/tests/db/Db.pro
index 39b3f6c6..db598ab2 100644
--- a/src/tests/db/Db.pro
+++ b/src/tests/db/Db.pro
@@ -1,6 +1,9 @@
 include(../common/Test.pri)
 
 SOURCES += \
+    $$UIPATH/conf/addressgroup.cpp \
+    $$UIPATH/conf/appgroup.cpp \
+    $$UIPATH/conf/firewallconf.cpp \
     $$UIPATH/db/databasemanager.cpp \
     $$UIPATH/db/databasesql.cpp \
     $$UIPATH/fortcommon.cpp \
@@ -8,6 +11,9 @@ SOURCES += \
     $$UIPATH/util/fileutil.cpp
 
 HEADERS += \
+    $$UIPATH/conf/addressgroup.h \
+    $$UIPATH/conf/appgroup.h \
+    $$UIPATH/conf/firewallconf.h \
     $$UIPATH/db/databasemanager.h \
     $$UIPATH/db/databasesql.h \
     $$UIPATH/fortcommon.h \
diff --git a/src/ui/conf/firewallconf.cpp b/src/ui/conf/firewallconf.cpp
index dd2f11f3..b211e6dd 100644
--- a/src/ui/conf/firewallconf.cpp
+++ b/src/ui/conf/firewallconf.cpp
@@ -12,6 +12,10 @@ FirewallConf::FirewallConf(QObject *parent) :
     m_logStat(false),
     m_appBlockAll(true),
     m_appAllowAll(false),
+    m_trafHourKeepDays(DEFAULT_TRAF_HOUR_KEEP_DAYS),
+    m_trafDayKeepDays(DEFAULT_TRAF_DAY_KEEP_DAYS),
+    m_trafMonthKeepMonths(DEFAULT_TRAF_MONTH_KEEP_MONTHS),
+    m_trafUnit(UnitAdaptive),
     m_ipInclude(new AddressGroup(this)),
     m_ipExclude(new AddressGroup(this))
 {
@@ -73,6 +77,38 @@ void FirewallConf::setAppAllowAll(bool appAllowAll)
     }
 }
 
+void FirewallConf::setTrafHourKeepDays(int trafHourKeepDays)
+{
+    if (m_trafHourKeepDays != trafHourKeepDays) {
+        m_trafHourKeepDays = trafHourKeepDays;
+        emit trafHourKeepDaysChanged();
+    }
+}
+
+void FirewallConf::setTrafDayKeepDays(int trafDayKeepDays)
+{
+    if (m_trafDayKeepDays != trafDayKeepDays) {
+        m_trafDayKeepDays = trafDayKeepDays;
+        emit trafDayKeepDaysChanged();
+    }
+}
+
+void FirewallConf::setTrafMonthKeepMonths(int trafMonthKeepMonths)
+{
+    if (m_trafMonthKeepMonths != trafMonthKeepMonths) {
+        m_trafMonthKeepMonths = trafMonthKeepMonths;
+        emit trafMonthKeepMonthsChanged();
+    }
+}
+
+void FirewallConf::setTrafUnit(int trafUnit)
+{
+    if (m_trafUnit != trafUnit) {
+        m_trafUnit = static_cast<TrafUnit>(trafUnit);
+        emit trafUnitChanged();
+    }
+}
+
 quint32 FirewallConf::appGroupBits() const
 {
     quint32 groupBits = 0;
@@ -146,14 +182,15 @@ void FirewallConf::copyFlags(const FirewallConf &o)
     setAppAllowAll(o.appAllowAll());
     setAppGroupBits(o.appGroupBits());
 
-    copyImmediateFlags(o);
+    copyImmediateValues(o);
 }
 
-void FirewallConf::copyImmediateFlags(const FirewallConf &o)
+void FirewallConf::copyImmediateValues(const FirewallConf &o)
 {
     setResolveAddress(o.resolveAddress());
     setLogBlocked(o.logBlocked());
     setLogStat(o.logStat());
+    setTrafUnit(o.trafUnit());
 }
 
 QVariant FirewallConf::toVariant() const
diff --git a/src/ui/conf/firewallconf.h b/src/ui/conf/firewallconf.h
index c7cf8326..480e281a 100644
--- a/src/ui/conf/firewallconf.h
+++ b/src/ui/conf/firewallconf.h
@@ -8,6 +8,11 @@
 QT_FORWARD_DECLARE_CLASS(AddressGroup)
 QT_FORWARD_DECLARE_CLASS(AppGroup)
 
+#define DEFAULT_APP_GROUP_BITS          0xFFFF
+#define DEFAULT_TRAF_HOUR_KEEP_DAYS     90  // ~3 months
+#define DEFAULT_TRAF_DAY_KEEP_DAYS      356  // ~1 year
+#define DEFAULT_TRAF_MONTH_KEEP_MONTHS  360  // ~3 years
+
 class FirewallConf : public QObject
 {
     Q_OBJECT
@@ -18,12 +23,26 @@ class FirewallConf : public QObject
     Q_PROPERTY(bool logStat READ logStat WRITE setLogStat NOTIFY logStatChanged)
     Q_PROPERTY(bool appBlockAll READ appBlockAll WRITE setAppBlockAll NOTIFY appBlockAllChanged)
     Q_PROPERTY(bool appAllowAll READ appAllowAll WRITE setAppAllowAll NOTIFY appAllowAllChanged)
+    Q_PROPERTY(int trafHourKeepDays READ trafHourKeepDays WRITE setTrafHourKeepDays NOTIFY trafHourKeepDaysChanged)
+    Q_PROPERTY(int trafDayKeepDays READ trafDayKeepDays WRITE setTrafDayKeepDays NOTIFY trafDayKeepDaysChanged)
+    Q_PROPERTY(int trafMonthKeepMonths READ trafMonthKeepMonths WRITE setTrafMonthKeepMonths NOTIFY trafMonthKeepMonthsChanged)
+    Q_PROPERTY(int trafUnit READ trafUnit WRITE setTrafUnit NOTIFY trafUnitChanged)
     Q_PROPERTY(AddressGroup *ipInclude READ ipInclude CONSTANT)
     Q_PROPERTY(AddressGroup *ipExclude READ ipExclude CONSTANT)
     Q_PROPERTY(QQmlListProperty<AppGroup> appGroups READ appGroups NOTIFY appGroupsChanged)
     Q_CLASSINFO("DefaultProperty", "appGroups")
 
 public:
+    enum TrafUnit {
+        UnitAdaptive = 0,
+        UnitBytes,
+        UnitKB,
+        UnitMB,
+        UnitGB,
+        UnitTB
+    };
+    Q_ENUM(TrafUnit)
+
     explicit FirewallConf(QObject *parent = nullptr);
 
     bool provBoot() const { return m_provBoot; }
@@ -47,6 +66,18 @@ public:
     bool appAllowAll() const { return m_appAllowAll; }
     void setAppAllowAll(bool appAllowAll);
 
+    int trafHourKeepDays() const { return m_trafHourKeepDays; }
+    void setTrafHourKeepDays(int trafHourKeepDays);
+
+    int trafDayKeepDays() const { return m_trafDayKeepDays; }
+    void setTrafDayKeepDays(int trafDayKeepDays);
+
+    int trafMonthKeepMonths() const { return m_trafMonthKeepMonths; }
+    void setTrafMonthKeepMonths(int trafMonthKeepMonths);
+
+    int trafUnit() const { return m_trafUnit; }
+    void setTrafUnit(int trafUnit);
+
     quint32 appGroupBits() const;
     void setAppGroupBits(quint32 groupBits);
 
@@ -57,7 +88,7 @@ public:
     QQmlListProperty<AppGroup> appGroups();
 
     void copyFlags(const FirewallConf &o);
-    void copyImmediateFlags(const FirewallConf &o);
+    void copyImmediateValues(const FirewallConf &o);
 
     QVariant toVariant() const;
     void fromVariant(const QVariant &v);
@@ -70,6 +101,10 @@ signals:
     void logStatChanged();
     void appBlockAllChanged();
     void appAllowAllChanged();
+    void trafHourKeepDaysChanged();
+    void trafDayKeepDaysChanged();
+    void trafMonthKeepMonthsChanged();
+    void trafUnitChanged();
     void appGroupsChanged();
 
 public slots:
@@ -90,6 +125,12 @@ private:
     uint m_appBlockAll      : 1;
     uint m_appAllowAll      : 1;
 
+    int m_trafHourKeepDays;
+    int m_trafDayKeepDays;
+    int m_trafMonthKeepMonths;
+
+    TrafUnit m_trafUnit;
+
     AddressGroup *m_ipInclude;
     AddressGroup *m_ipExclude;
 
diff --git a/src/ui/db/databasemanager.cpp b/src/ui/db/databasemanager.cpp
index de8a0046..7aeff31e 100644
--- a/src/ui/db/databasemanager.cpp
+++ b/src/ui/db/databasemanager.cpp
@@ -1,5 +1,6 @@
 #include "databasemanager.h"
 
+#include "../conf/firewallconf.h"
 #include "../util/dateutil.h"
 #include "../util/fileutil.h"
 #include "databasesql.h"
@@ -14,6 +15,7 @@ DatabaseManager::DatabaseManager(const QString &filePath,
     m_lastTrafDay(0),
     m_lastTrafMonth(0),
     m_filePath(filePath),
+    m_conf(nullptr),
     m_sqliteDb(new SqliteDb())
 {
     SqliteEngine::initialize();
@@ -28,6 +30,15 @@ DatabaseManager::~DatabaseManager()
     SqliteEngine::shutdown();
 }
 
+void DatabaseManager::setFirewallConf(const FirewallConf *conf)
+{
+    m_conf = conf;
+
+    if (m_conf && !m_conf->logStat()) {
+        logClear();
+    }
+}
+
 bool DatabaseManager::initialize()
 {
     const bool fileExists = FileUtil::fileExists(m_filePath);
@@ -40,8 +51,11 @@ bool DatabaseManager::initialize()
     return fileExists || createTables();
 }
 
-void DatabaseManager::logProcNew(const QString &appPath, bool &isNew)
+qint64 DatabaseManager::logProcNew(const QString &appPath, bool &isNew)
 {
+    if (m_conf && !m_conf->logStat())
+        return 0;
+
     qint64 appId = getAppId(appPath);
     if (appId == 0) {
         appId = createAppId(appPath);
@@ -50,6 +64,8 @@ void DatabaseManager::logProcNew(const QString &appPath, bool &isNew)
 
     m_appPaths.prepend(appPath);
     m_appIds.prepend(appId);
+
+    return appId;
 }
 
 void DatabaseManager::logStatTraf(quint16 procCount, const quint8 *procBits,
@@ -57,6 +73,9 @@ void DatabaseManager::logStatTraf(quint16 procCount, const quint8 *procBits,
 {
     Q_ASSERT(procCount == m_appIds.size());
 
+    if (m_conf && !m_conf->logStat())
+        return;
+
     QVector<quint16> delProcIndexes;
 
     const qint64 unixTime = DateUtil::getUnixTime();
@@ -78,28 +97,28 @@ void DatabaseManager::logStatTraf(quint16 procCount, const quint8 *procBits,
     m_sqliteDb->beginTransaction();
 
     // Insert Statemets
-    QStmtList insertTrafAppStmts = QStmtList()
-            << getTrafficStmt(DatabaseSql::sqlInsertTrafficAppHour, trafHour)
-            << getTrafficStmt(DatabaseSql::sqlInsertTrafficAppDay, trafDay)
-            << getTrafficStmt(DatabaseSql::sqlInsertTrafficAppMonth, trafMonth)
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficAppTotal, -1);
+    const QStmtList insertTrafAppStmts = QStmtList()
+            << getTrafficStmt(DatabaseSql::sqlInsertTrafAppHour, trafHour)
+            << getTrafficStmt(DatabaseSql::sqlInsertTrafAppDay, trafDay)
+            << getTrafficStmt(DatabaseSql::sqlInsertTrafAppMonth, trafMonth)
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafAppTotal, -1);
 
-    QStmtList insertTrafStmts = QStmtList()
-            << getTrafficStmt(DatabaseSql::sqlInsertTrafficHour, trafHour)
-            << getTrafficStmt(DatabaseSql::sqlInsertTrafficDay, trafDay)
-            << getTrafficStmt(DatabaseSql::sqlInsertTrafficMonth, trafMonth);
+    const QStmtList insertTrafStmts = QStmtList()
+            << getTrafficStmt(DatabaseSql::sqlInsertTrafHour, trafHour)
+            << getTrafficStmt(DatabaseSql::sqlInsertTrafDay, trafDay)
+            << getTrafficStmt(DatabaseSql::sqlInsertTrafMonth, trafMonth);
 
     // Update Statemets
-    QStmtList updateTrafAppStmts = QStmtList()
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficAppHour, trafHour)
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficAppDay, trafDay)
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficAppMonth, trafMonth)
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficAppTotal, -1);
+    const QStmtList updateTrafAppStmts = QStmtList()
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafAppHour, trafHour)
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafAppDay, trafDay)
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafAppMonth, trafMonth)
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafAppTotal, -1);
 
-    QStmtList updateTrafStmts = QStmtList()
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficHour, trafHour)
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficDay, trafDay)
-            << getTrafficStmt(DatabaseSql::sqlUpdateTrafficMonth, trafMonth);
+    const QStmtList updateTrafStmts = QStmtList()
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafHour, trafHour)
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafDay, trafDay)
+            << getTrafficStmt(DatabaseSql::sqlUpdateTrafMonth, trafMonth);
 
     for (quint16 i = 0; i < procCount; ++i) {
         const bool active = procBits[i / 8] & (1 << (i & 7));
@@ -124,6 +143,30 @@ void DatabaseManager::logStatTraf(quint16 procCount, const quint8 *procBits,
         }
     }
 
+    // Delete old data
+    if (isNewDay) {
+        const qint32 oldTrafHour = trafHour
+                - 24 * (m_conf ? m_conf->trafHourKeepDays()
+                               : DEFAULT_TRAF_HOUR_KEEP_DAYS);
+        const qint32 oldTrafDay = trafHour
+                - 24 * (m_conf ? m_conf->trafDayKeepDays()
+                               : DEFAULT_TRAF_DAY_KEEP_DAYS);
+        const qint32 oldTrafMonth = DateUtil::addUnixMonths(
+                    trafHour, -(m_conf ? m_conf->trafMonthKeepMonths()
+                                       : DEFAULT_TRAF_MONTH_KEEP_MONTHS));
+
+        // Delete Statemets
+        const QStmtList deleteTrafStmts = QStmtList()
+                << getTrafficStmt(DatabaseSql::sqlDeleteTrafAppHour, oldTrafHour)
+                << getTrafficStmt(DatabaseSql::sqlDeleteTrafAppDay, oldTrafDay)
+                << getTrafficStmt(DatabaseSql::sqlDeleteTrafAppMonth, oldTrafMonth)
+                << getTrafficStmt(DatabaseSql::sqlDeleteTrafHour, oldTrafHour)
+                << getTrafficStmt(DatabaseSql::sqlDeleteTrafDay, oldTrafDay)
+                << getTrafficStmt(DatabaseSql::sqlDeleteTrafMonth, oldTrafMonth);
+
+        deleteTrafficList(deleteTrafStmts);
+    }
+
     m_sqliteDb->commitTransaction();
 
     // Delete inactive processes
@@ -237,6 +280,14 @@ bool DatabaseManager::updateTraffic(SqliteStmt *stmt, quint32 inBytes,
             && m_sqliteDb->changes() != 0;
 }
 
+void DatabaseManager::deleteTrafficList(const QStmtList &deleteStmtList)
+{
+    foreach (SqliteStmt *stmtDelete, deleteStmtList) {
+        stmtDelete->step();
+        stmtDelete->reset();
+    }
+}
+
 qint32 DatabaseManager::getTrafficTime(const char *sql, qint64 appId)
 {
     qint32 trafTime = 0;
diff --git a/src/ui/db/databasemanager.h b/src/ui/db/databasemanager.h
index e71ac320..a4f754b0 100644
--- a/src/ui/db/databasemanager.h
+++ b/src/ui/db/databasemanager.h
@@ -6,6 +6,7 @@
 #include <QStringList>
 #include <QVector>
 
+QT_FORWARD_DECLARE_CLASS(FirewallConf)
 QT_FORWARD_DECLARE_CLASS(SqliteDb)
 QT_FORWARD_DECLARE_CLASS(SqliteStmt)
 
@@ -18,11 +19,14 @@ public:
                              QObject *parent = nullptr);
     virtual ~DatabaseManager();
 
-    bool initialize();
+    const FirewallConf *firewallConf() const { return m_conf; }
+    void setFirewallConf(const FirewallConf *conf);
 
     SqliteDb *sqliteDb() const { return m_sqliteDb; }
 
-    void logProcNew(const QString &appPath, bool &isNew);
+    bool initialize();
+
+    qint64 logProcNew(const QString &appPath, bool &isNew);
     void logStatTraf(quint16 procCount, const quint8 *procBits,
                      const quint32 *trafBytes);
     void logClear();
@@ -56,6 +60,8 @@ private:
     bool updateTraffic(SqliteStmt *stmt, quint32 inBytes,
                        quint32 outBytes, qint64 appId = 0);
 
+    void deleteTrafficList(const QStmtList &deleteStmtList);
+
     SqliteStmt *getTrafficStmt(const char *sql, qint32 trafTime);
 
     SqliteStmt *getSqliteStmt(const char *sql);
@@ -67,6 +73,8 @@ private:
 
     QString m_filePath;
 
+    const FirewallConf *m_conf;
+
     SqliteDb *m_sqliteDb;
 
     QHash<const char *, SqliteStmt *> m_sqliteStmts;
diff --git a/src/ui/db/databasesql.cpp b/src/ui/db/databasesql.cpp
index 62b75399..423f71c1 100644
--- a/src/ui/db/databasesql.cpp
+++ b/src/ui/db/databasesql.cpp
@@ -72,79 +72,79 @@ const char * const DatabaseSql::sqlSelectAppPaths =
         "SELECT app_id, path FROM app ORDER BY creat_time;"
         ;
 
-const char * const DatabaseSql::sqlInsertTrafficAppHour =
+const char * const DatabaseSql::sqlInsertTrafAppHour =
         "INSERT INTO traffic_app_hour(app_id, traf_time, in_bytes, out_bytes)"
         "  VALUES(?4, ?1, ?2, ?3);"
         ;
 
-const char * const DatabaseSql::sqlInsertTrafficAppDay =
+const char * const DatabaseSql::sqlInsertTrafAppDay =
         "INSERT INTO traffic_app_day(app_id, traf_time, in_bytes, out_bytes)"
         "  VALUES(?4, ?1, ?2, ?3);"
         ;
 
-const char * const DatabaseSql::sqlInsertTrafficAppMonth =
+const char * const DatabaseSql::sqlInsertTrafAppMonth =
         "INSERT INTO traffic_app_month(app_id, traf_time, in_bytes, out_bytes)"
         "  VALUES(?4, ?1, ?2, ?3);"
         ;
 
-const char * const DatabaseSql::sqlInsertTrafficHour =
+const char * const DatabaseSql::sqlInsertTrafHour =
         "INSERT INTO traffic_hour(traf_time, in_bytes, out_bytes)"
         "  VALUES(?1, ?2, ?3);"
         ;
 
-const char * const DatabaseSql::sqlInsertTrafficDay =
+const char * const DatabaseSql::sqlInsertTrafDay =
         "INSERT INTO traffic_day(traf_time, in_bytes, out_bytes)"
         "  VALUES(?1, ?2, ?3);"
         ;
 
-const char * const DatabaseSql::sqlInsertTrafficMonth =
+const char * const DatabaseSql::sqlInsertTrafMonth =
         "INSERT INTO traffic_month(traf_time, in_bytes, out_bytes)"
         "  VALUES(?1, ?2, ?3);"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficAppHour =
+const char * const DatabaseSql::sqlUpdateTrafAppHour =
         "UPDATE traffic_app_hour"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
         "  WHERE app_id = ?4 and traf_time = ?1;"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficAppDay =
+const char * const DatabaseSql::sqlUpdateTrafAppDay =
         "UPDATE traffic_app_day"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
         "  WHERE app_id = ?4 and traf_time = ?1;"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficAppMonth =
+const char * const DatabaseSql::sqlUpdateTrafAppMonth =
         "UPDATE traffic_app_month"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
         "  WHERE app_id = ?4 and traf_time = ?1;"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficAppTotal =
+const char * const DatabaseSql::sqlUpdateTrafAppTotal =
         "UPDATE app"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
         "  WHERE app_id = ?4 and 0 != ?1;"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficHour =
+const char * const DatabaseSql::sqlUpdateTrafHour =
         "UPDATE traffic_hour"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
         "  WHERE traf_time = ?1;"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficDay =
+const char * const DatabaseSql::sqlUpdateTrafDay =
         "UPDATE traffic_day"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
         "  WHERE traf_time = ?1;"
         ;
 
-const char * const DatabaseSql::sqlUpdateTrafficMonth =
+const char * const DatabaseSql::sqlUpdateTrafMonth =
         "UPDATE traffic_month"
         "  SET in_bytes = in_bytes + ?2,"
         "    out_bytes = out_bytes + ?3"
@@ -229,3 +229,33 @@ const char * const DatabaseSql::sqlSelectTrafTotal =
         "SELECT sum(in_bytes), sum(out_bytes)"
         "  FROM app WHERE 0 != ?1;"
         ;
+
+const char * const DatabaseSql::sqlDeleteTrafAppHour =
+        "DELETE FROM traffic_app_hour"
+        "  WHERE traf_time < ?1"
+        "    and app_id in (SELECT app_id FROM app);"
+        ;
+
+const char * const DatabaseSql::sqlDeleteTrafAppDay =
+        "DELETE FROM traffic_app_day"
+        "  WHERE traf_time < ?1"
+        "    and app_id in (SELECT app_id FROM app);"
+        ;
+
+const char * const DatabaseSql::sqlDeleteTrafAppMonth =
+        "DELETE FROM traffic_app_month"
+        "  WHERE traf_time < ?1"
+        "    and app_id in (SELECT app_id FROM app);"
+        ;
+
+const char * const DatabaseSql::sqlDeleteTrafHour =
+        "DELETE FROM traffic_hour WHERE traf_time < ?1;"
+        ;
+
+const char * const DatabaseSql::sqlDeleteTrafDay =
+        "DELETE FROM traffic_day WHERE traf_time < ?1;"
+        ;
+
+const char * const DatabaseSql::sqlDeleteTrafMonth =
+        "DELETE FROM traffic_month WHERE traf_time < ?1;"
+        ;
diff --git a/src/ui/db/databasesql.h b/src/ui/db/databasesql.h
index 51f27c26..17576e4b 100644
--- a/src/ui/db/databasesql.h
+++ b/src/ui/db/databasesql.h
@@ -12,23 +12,23 @@ public:
 
     static const char * const sqlSelectAppPaths;
 
-    static const char * const sqlInsertTrafficAppHour;
-    static const char * const sqlInsertTrafficAppDay;
-    static const char * const sqlInsertTrafficAppMonth;
+    static const char * const sqlInsertTrafAppHour;
+    static const char * const sqlInsertTrafAppDay;
+    static const char * const sqlInsertTrafAppMonth;
 
-    static const char * const sqlInsertTrafficHour;
-    static const char * const sqlInsertTrafficDay;
-    static const char * const sqlInsertTrafficMonth;
+    static const char * const sqlInsertTrafHour;
+    static const char * const sqlInsertTrafDay;
+    static const char * const sqlInsertTrafMonth;
 
-    static const char * const sqlUpdateTrafficAppHour;
-    static const char * const sqlUpdateTrafficAppDay;
-    static const char * const sqlUpdateTrafficAppMonth;
+    static const char * const sqlUpdateTrafAppHour;
+    static const char * const sqlUpdateTrafAppDay;
+    static const char * const sqlUpdateTrafAppMonth;
 
-    static const char * const sqlUpdateTrafficHour;
-    static const char * const sqlUpdateTrafficDay;
-    static const char * const sqlUpdateTrafficMonth;
+    static const char * const sqlUpdateTrafHour;
+    static const char * const sqlUpdateTrafDay;
+    static const char * const sqlUpdateTrafMonth;
 
-    static const char * const sqlUpdateTrafficAppTotal;
+    static const char * const sqlUpdateTrafAppTotal;
 
     static const char * const sqlSelectMinTrafAppHour;
     static const char * const sqlSelectMinTrafAppDay;
@@ -49,6 +49,14 @@ public:
     static const char * const sqlSelectTrafDay;
     static const char * const sqlSelectTrafMonth;
     static const char * const sqlSelectTrafTotal;
+
+    static const char * const sqlDeleteTrafAppHour;
+    static const char * const sqlDeleteTrafAppDay;
+    static const char * const sqlDeleteTrafAppMonth;
+
+    static const char * const sqlDeleteTrafHour;
+    static const char * const sqlDeleteTrafDay;
+    static const char * const sqlDeleteTrafMonth;
 };
 
 #endif // DATABASESQL_H
diff --git a/src/ui/fortmanager.cpp b/src/ui/fortmanager.cpp
index b9ba7105..b260304b 100644
--- a/src/ui/fortmanager.cpp
+++ b/src/ui/fortmanager.cpp
@@ -245,11 +245,11 @@ bool FortManager::applyConf(bool onlyFlags)
     return saveSettings(newConf, onlyFlags);
 }
 
-bool FortManager::applyConfImmediateFlags()
+bool FortManager::applyConfImmediateValues()
 {
     Q_ASSERT(m_firewallConfToEdit != nullConf());
 
-    m_firewallConf->copyImmediateFlags(*m_firewallConfToEdit);
+    m_firewallConf->copyImmediateValues(*m_firewallConfToEdit);
 
     return saveSettings(m_firewallConf, true, true);
 }
@@ -276,9 +276,9 @@ bool FortManager::loadSettings(FirewallConf *conf)
 }
 
 bool FortManager::saveSettings(FirewallConf *newConf, bool onlyFlags,
-                               bool immediateFlags)
+                               bool immediateValues)
 {
-    if (!(onlyFlags ? m_fortSettings->writeConfFlags(*newConf)
+    if (!(onlyFlags ? m_fortSettings->writeConfIni(*newConf)
           : m_fortSettings->writeConf(*newConf))) {
         showErrorBox("Save Settings: " + m_fortSettings->errorMessage());
         return false;
@@ -289,7 +289,7 @@ bool FortManager::saveSettings(FirewallConf *newConf, bool onlyFlags,
         m_firewallConf = newConf;
     }
 
-    if (!immediateFlags) {
+    if (!immediateValues) {
         updateTrayMenu();
     }
 
@@ -308,7 +308,7 @@ bool FortManager::updateDriverConf(FirewallConf *conf)
         return false;
     }
 
-    updateLogManager(conf);
+    updateDatabaseManager(conf);
 
     return true;
 }
@@ -324,19 +324,14 @@ bool FortManager::updateDriverConfFlags(FirewallConf *conf)
         return false;
     }
 
-    updateLogManager(conf);
+    updateDatabaseManager(conf);
 
     return true;
 }
 
-void FortManager::updateLogManager(FirewallConf *conf)
+void FortManager::updateDatabaseManager(FirewallConf *conf)
 {
-    if (!conf->logStat()) {
-        m_databaseManager->logClear();
-    }
-
-    m_logManager->setLogBlockedEnabled(conf->logBlocked());
-    m_logManager->setLogStatEnabled(conf->logStat());
+    m_databaseManager->setFirewallConf(conf);
 }
 
 void FortManager::setLanguage(int language)
@@ -360,7 +355,7 @@ void FortManager::saveTrayFlags()
         ++i;
     }
 
-    m_fortSettings->writeConfFlags(*m_firewallConf);
+    m_fortSettings->writeConfIni(*m_firewallConf);
 
     updateDriverConfFlags(m_firewallConf);
 }
diff --git a/src/ui/fortmanager.h b/src/ui/fortmanager.h
index a1deb672..8d568f5c 100644
--- a/src/ui/fortmanager.h
+++ b/src/ui/fortmanager.h
@@ -54,7 +54,7 @@ public slots:
     bool saveOriginConf(const QString &message);
     bool saveConf(bool onlyFlags = false);
     bool applyConf(bool onlyFlags = false);
-    bool applyConfImmediateFlags();
+    bool applyConfImmediateValues();
 
     void setLanguage(int language);
 
@@ -78,12 +78,12 @@ private:
 
     bool loadSettings(FirewallConf *conf);
     bool saveSettings(FirewallConf *newConf, bool onlyFlags = false,
-                      bool immediateFlags = false);
+                      bool immediateValues = false);
 
     bool updateDriverConf(FirewallConf *conf);
     bool updateDriverConfFlags(FirewallConf *conf);
 
-    void updateLogManager(FirewallConf *conf);
+    void updateDatabaseManager(FirewallConf *conf);
 
     FirewallConf *cloneConf(const FirewallConf &conf);
 
diff --git a/src/ui/fortsettings.cpp b/src/ui/fortsettings.cpp
index bad9452d..656bca04 100644
--- a/src/ui/fortsettings.cpp
+++ b/src/ui/fortsettings.cpp
@@ -140,7 +140,7 @@ bool FortSettings::readConf(FirewallConf &conf)
     return (!(fileExists || backupFileExists)
             || (fileExists && tryToReadConf(conf, filePath))
             || tryToReadConf(conf, backupFilePath))
-            && readConfFlags(conf);  // read flags at the end to use correct app groups
+            && readConfIni(conf);  // read flags at the end to use correct app groups
 }
 
 bool FortSettings::tryToReadConf(FirewallConf &conf, const QString &filePath)
@@ -165,7 +165,7 @@ bool FortSettings::writeConf(const FirewallConf &conf)
     const QString filePath = confFilePath();
     const QString backupFilePath = confBackupFilePath();
 
-    if (!writeConfFlags(conf)) {
+    if (!writeConfIni(conf)) {
         setErrorMessage(tr("Can't write .ini file"));
         return false;
     }
@@ -204,7 +204,7 @@ bool FortSettings::tryToWriteConf(const FirewallConf &conf, const QString &fileP
     return true;
 }
 
-bool FortSettings::readConfFlags(FirewallConf &conf) const
+bool FortSettings::readConfIni(FirewallConf &conf) const
 {
     m_ini->beginGroup("confFlags");
     conf.setProvBoot(iniBool("provBoot"));
@@ -216,13 +216,20 @@ bool FortSettings::readConfFlags(FirewallConf &conf) const
     conf.ipExclude()->setUseAll(iniBool("ipExcludeAll"));
     conf.setAppBlockAll(iniBool("appBlockAll", true));
     conf.setAppAllowAll(iniBool("appAllowAll"));
-    conf.setAppGroupBits(iniUInt("appGroupBits", 0xFFFF));
+    conf.setAppGroupBits(iniUInt("appGroupBits", DEFAULT_APP_GROUP_BITS));
+    m_ini->endGroup();
+
+    m_ini->beginGroup("stat");
+    conf.setTrafHourKeepDays(iniInt("trafHourKeepDays", DEFAULT_TRAF_HOUR_KEEP_DAYS));
+    conf.setTrafDayKeepDays(iniInt("trafDayKeepDays", DEFAULT_TRAF_DAY_KEEP_DAYS));
+    conf.setTrafMonthKeepMonths(iniInt("trafMonthKeepMonths", DEFAULT_TRAF_MONTH_KEEP_MONTHS));
+    conf.setTrafUnit(iniInt("trafUnit"));
     m_ini->endGroup();
 
     return true;
 }
 
-bool FortSettings::writeConfFlags(const FirewallConf &conf)
+bool FortSettings::writeConfIni(const FirewallConf &conf)
 {
     m_ini->beginGroup("confFlags");
     setIniValue("provBoot", conf.provBoot());
@@ -234,7 +241,14 @@ bool FortSettings::writeConfFlags(const FirewallConf &conf)
     setIniValue("ipExcludeAll", conf.ipExclude()->useAll());
     setIniValue("appBlockAll", conf.appBlockAll());
     setIniValue("appAllowAll", conf.appAllowAll());
-    setIniValue("appGroupBits", conf.appGroupBits());
+    setIniValue("appGroupBits", conf.appGroupBits(), DEFAULT_APP_GROUP_BITS);
+    m_ini->endGroup();
+
+    m_ini->beginGroup("stat");
+    setIniValue("trafHourKeepDays", conf.trafHourKeepDays(), DEFAULT_TRAF_HOUR_KEEP_DAYS);
+    setIniValue("trafDayKeepDays", conf.trafDayKeepDays(), DEFAULT_TRAF_DAY_KEEP_DAYS);
+    setIniValue("trafMonthKeepMonths", conf.trafMonthKeepMonths(), DEFAULT_TRAF_MONTH_KEEP_MONTHS);
+    setIniValue("trafUnit", conf.trafUnit());
     m_ini->endGroup();
 
     return iniSync();
@@ -250,7 +264,7 @@ int FortSettings::iniInt(const QString &key, int defaultValue) const
     return iniValue(key, defaultValue).toInt();
 }
 
-int FortSettings::iniUInt(const QString &key, int defaultValue) const
+uint FortSettings::iniUInt(const QString &key, int defaultValue) const
 {
     return iniValue(key, defaultValue).toUInt();
 }
diff --git a/src/ui/fortsettings.h b/src/ui/fortsettings.h
index 889cf3cb..82ef96b3 100644
--- a/src/ui/fortsettings.h
+++ b/src/ui/fortsettings.h
@@ -54,8 +54,8 @@ public slots:
     bool readConf(FirewallConf &conf);
     bool writeConf(const FirewallConf &conf);
 
-    bool readConfFlags(FirewallConf &conf) const;
-    bool writeConfFlags(const FirewallConf &conf);
+    bool readConfIni(FirewallConf &conf) const;
+    bool writeConfIni(const FirewallConf &conf);
 
 private:
     void processArguments(const QStringList &args);
@@ -71,7 +71,7 @@ private:
 
     bool iniBool(const QString &key, bool defaultValue = false) const;
     int iniInt(const QString &key, int defaultValue = 0) const;
-    int iniUInt(const QString &key, int defaultValue = 0) const;
+    uint iniUInt(const QString &key, int defaultValue = 0) const;
     int iniReal(const QString &key, qreal defaultValue = 0) const;
     QString iniText(const QString &key, const QString &defaultValue = QString()) const;
     QStringList iniList(const QString &key) const;
diff --git a/src/ui/log/logmanager.cpp b/src/ui/log/logmanager.cpp
index 1ea93645..66396cfa 100644
--- a/src/ui/log/logmanager.cpp
+++ b/src/ui/log/logmanager.cpp
@@ -14,8 +14,6 @@ LogManager::LogManager(DatabaseManager *databaseManager,
                        QObject *parent) :
     QObject(parent),
     m_active(false),
-    m_logBlockedEnabled(false),
-    m_logStatEnabled(false),
     m_driverWorker(driverWorker),
     m_appBlockedModel(new AppBlockedModel(this)),
     m_appStatModel(new AppStatModel(databaseManager, this))
@@ -39,22 +37,6 @@ void LogManager::setActive(bool active)
     }
 }
 
-void LogManager::setLogBlockedEnabled(bool enabled)
-{
-    if (m_logBlockedEnabled != enabled) {
-        m_logBlockedEnabled = enabled;
-        emit logBlockedEnabledChanged();
-    }
-}
-
-void LogManager::setLogStatEnabled(bool enabled)
-{
-    if (m_logStatEnabled != enabled) {
-        m_logStatEnabled = enabled;
-        emit logStatEnabledChanged();
-    }
-}
-
 void LogManager::setErrorMessage(const QString &errorMessage)
 {
     if (m_errorMessage != errorMessage) {
@@ -120,26 +102,20 @@ void LogManager::readLogEntries(LogBuffer *logBuffer)
         switch (logBuffer->peekEntryType()) {
         case LogEntry::AppBlocked: {
             logBuffer->readEntryBlocked(&entryBlocked);
-            if (m_logBlockedEnabled) {
-                m_appBlockedModel->addLogEntry(entryBlocked);
-            }
+            m_appBlockedModel->addLogEntry(entryBlocked);
             break;
         }
         case LogEntry::ProcNew: {
             logBuffer->readEntryProcNew(&entryProcNew);
-            if (m_logStatEnabled) {
-                m_appStatModel->handleProcNew(entryProcNew.path());
-            }
+            m_appStatModel->handleProcNew(entryProcNew.path());
             break;
         }
         case LogEntry::StatTraf: {
             logBuffer->readEntryStatTraf(&entryStatTraf);
-            if (m_logStatEnabled) {
-                m_appStatModel->handleStatTraf(
-                            entryStatTraf.procCount(),
-                            entryStatTraf.procBits(),
-                            entryStatTraf.trafBytes());
-            }
+            m_appStatModel->handleStatTraf(
+                        entryStatTraf.procCount(),
+                        entryStatTraf.procBits(),
+                        entryStatTraf.trafBytes());
             break;
         }
         default:
diff --git a/src/ui/log/logmanager.h b/src/ui/log/logmanager.h
index 46b8e597..b3937f97 100644
--- a/src/ui/log/logmanager.h
+++ b/src/ui/log/logmanager.h
@@ -27,20 +27,12 @@ public:
 
     void setActive(bool active);
 
-    bool logBlockedEnabled() const { return m_logBlockedEnabled; }
-    void setLogBlockedEnabled(bool enabled);
-
-    bool logStatEnabled() const { return m_logStatEnabled; }
-    void setLogStatEnabled(bool enabled);
-
     QString errorMessage() const { return m_errorMessage; }
 
     void initialize();
 
 signals:
     void activeChanged();
-    void logBlockedEnabledChanged();
-    void logStatEnabledChanged();
     void errorMessageChanged();
 
 public slots:
@@ -63,8 +55,6 @@ private:
 
 private:
     bool m_active;
-    bool m_logBlockedEnabled;
-    bool m_logStatEnabled;
 
     DriverWorker *m_driverWorker;
     QList<LogBuffer *> m_freeBuffers;
diff --git a/src/ui/log/model/appstatmodel.cpp b/src/ui/log/model/appstatmodel.cpp
index dd69caf5..4b721b88 100644
--- a/src/ui/log/model/appstatmodel.cpp
+++ b/src/ui/log/model/appstatmodel.cpp
@@ -18,8 +18,10 @@ void AppStatModel::initialize()
 
 TrafListModel *AppStatModel::trafListModel(int trafType, int row) const
 {
+    Q_ASSERT(row < m_appIds.size());
+
     m_trafListModel->setType(static_cast<TrafListModel::TrafType>(trafType));
-    m_trafListModel->setAppId(row == -1 ? 0 : m_appIds.at(row));
+    m_trafListModel->setAppId(row < 0 ? 0 : m_appIds.at(row));
     m_trafListModel->reset();
 
     return m_trafListModel;
@@ -46,9 +48,10 @@ void AppStatModel::updateList()
 void AppStatModel::handleProcNew(const QString &appPath)
 {
     bool isNew = false;
-    m_databaseManager->logProcNew(appPath, isNew);
+    const qint64 appId = m_databaseManager->logProcNew(appPath, isNew);
 
     if (isNew) {
+        m_appIds.append(appId);
         insert(appPath);
     }
 }
diff --git a/src/ui/log/model/traflistmodel.cpp b/src/ui/log/model/traflistmodel.cpp
index 9ddcdb00..3173928e 100644
--- a/src/ui/log/model/traflistmodel.cpp
+++ b/src/ui/log/model/traflistmodel.cpp
@@ -1,5 +1,8 @@
 #include "traflistmodel.h"
 
+#include <QLocale>
+
+#include "../../conf/firewallconf.h"
 #include "../../db/databasemanager.h"
 #include "../../db/databasesql.h"
 #include "../../util/dateutil.h"
@@ -65,9 +68,10 @@ QVariant TrafListModel::data(const QModelIndex &index, int role) const
 
         switch (role) {
         case DateTimeRole: return formatTrafTime(m_rowCache.trafTime);
-        case DownloadRole: return m_rowCache.inBytes;
-        case UploadRole: return m_rowCache.outBytes;
-        case SumRole: return m_rowCache.inBytes + m_rowCache.outBytes;
+        case DownloadRole: return formatTrafUnit(m_rowCache.inBytes);
+        case UploadRole: return formatTrafUnit(m_rowCache.outBytes);
+        case SumRole: return formatTrafUnit(m_rowCache.inBytes
+                                            + m_rowCache.outBytes);
         }
     }
     return QVariant();
@@ -102,6 +106,36 @@ void TrafListModel::updateRowCache(int row) const
                 m_appId);
 }
 
+QString TrafListModel::formatTrafUnit(qint64 bytes) const
+{
+    static const QVector<qint64> unitMults = {
+        1, // Adaptive
+        1, // Bytes
+        1024,  // KB
+        1024 * 1024,  // MB
+        qint64(1024) * 1024 * 1024,  // GB
+        qint64(1024) * 1024 * 1024 * 1024  // TB
+    };
+
+    if (bytes == 0) {
+        return QLatin1String("0");
+    }
+
+    const FirewallConf *conf = m_databaseManager->firewallConf();
+    const int trafUnit = conf ? conf->trafUnit() : 0;
+    const int trafPrec = (trafUnit == FirewallConf::UnitBytes) ? 0 : 2;
+
+    QLocale locale;
+
+    if (trafUnit == FirewallConf::UnitAdaptive) {
+        return locale.formattedDataSize(bytes, trafPrec);
+    }
+
+    const qint64 unitMult = unitMults.at(trafUnit);
+
+    return locale.toString(qreal(bytes) / unitMult, 'f', trafPrec);
+}
+
 QString TrafListModel::formatTrafTime(qint32 trafTime) const
 {
     const qint64 unixTime = DateUtil::toUnixTime(trafTime);
diff --git a/src/ui/log/model/traflistmodel.h b/src/ui/log/model/traflistmodel.h
index a5927dda..a317b329 100644
--- a/src/ui/log/model/traflistmodel.h
+++ b/src/ui/log/model/traflistmodel.h
@@ -61,6 +61,7 @@ public slots:
 private:
     void updateRowCache(int row) const;
 
+    QString formatTrafUnit(qint64 bytes) const;
     QString formatTrafTime(qint32 trafTime) const;
 
     qint32 getTrafTime(int row) const;
diff --git a/src/ui/qml/pages/BlockedPage.qml b/src/ui/qml/pages/BlockedPage.qml
index c4880a52..e2979aed 100644
--- a/src/ui/qml/pages/BlockedPage.qml
+++ b/src/ui/qml/pages/BlockedPage.qml
@@ -31,6 +31,8 @@ BasePage {
         spacing: 10
 
         RowLayout {
+            spacing: 15
+
             Button {
                 enabled: appListView.count
                 text: translationManager.dummyBool
@@ -48,7 +50,7 @@ BasePage {
 
                     firewallConf.resolveAddress = checked;
 
-                    fortManager.applyConfImmediateFlags();
+                    fortManager.applyConfImmediateValues();
 
                     hostInfoCache.cacheChanged();  // refresh ipListView
                 }
@@ -69,7 +71,7 @@ BasePage {
 
                     firewallConf.logBlocked = checked;
 
-                    fortManager.applyConfImmediateFlags();
+                    fortManager.applyConfImmediateValues();
                 }
             }
         }
diff --git a/src/ui/qml/pages/StatisticsPage.qml b/src/ui/qml/pages/StatisticsPage.qml
index 0f58821c..a6cc64b6 100644
--- a/src/ui/qml/pages/StatisticsPage.qml
+++ b/src/ui/qml/pages/StatisticsPage.qml
@@ -24,11 +24,24 @@ BasePage {
         trafsContainer.width * 0.2
     ]
 
+    readonly property var trafUnitNames:
+        translationManager.dummyBool
+        && [
+            qsTranslate("qml", "Adaptive"),
+            qsTranslate("qml", "Bytes"),
+            qsTranslate("qml", "KiB"),
+            qsTranslate("qml", "MiB"),
+            qsTranslate("qml", "GiB"),
+            qsTranslate("qml", "TiB")
+        ]
+
     ColumnLayout {
         anchors.fill: parent
         spacing: 10
 
         RowLayout {
+            spacing: 15
+
             Button {
                 enabled: appListView.currentIndex >= 0
                 text: translationManager.dummyBool
@@ -36,6 +49,31 @@ BasePage {
                 onClicked: trafListModel.refresh()
             }
 
+            Row {
+                spacing: 5
+
+                Label {
+                    anchors.verticalCenter: parent.verticalCenter
+                    text: translationManager.dummyBool
+                          && qsTranslate("qml", "Units:")
+                }
+
+                ComboBox {
+                    id: comboTrafUnit
+
+                    currentIndex: firewallConf.trafUnit
+                    model: trafUnitNames
+
+                    onActivated: {
+                        firewallConf.trafUnit = index;
+
+                        fortManager.applyConfImmediateValues();
+
+                        trafListModel.refresh();
+                    }
+                }
+            }
+
             Item {
                 Layout.fillWidth: true
             }
@@ -52,7 +90,7 @@ BasePage {
 
                     firewallConf.logStat = checked;
 
-                    fortManager.applyConfImmediateFlags();
+                    fortManager.applyConfImmediateValues();
                 }
             }
         }