diff --git a/include/maxscale/backend.hh b/include/maxscale/backend.hh
index 078c3cc09..262f7beef 100644
--- a/include/maxscale/backend.hh
+++ b/include/maxscale/backend.hh
@@ -20,6 +20,7 @@
 
 #include <maxscale/service.h>
 #include <maxscale/session_command.hh>
+#include <maxbase/stopwatch.hh>
 
 
 namespace maxscale
@@ -323,6 +324,12 @@ public:
         return m_uri.c_str();
     }
 
+    void select_started();
+    void select_ended();
+
+    int64_t                       num_selects() const;
+    const maxbase::StopWatch&     session_timer() const;
+    const maxbase::IntervalTimer& select_timer() const;
 private:
     /**
      * Internal state of the backend
@@ -357,6 +364,10 @@ private:
     SessionCommandList m_session_commands;  /**< List of session commands that are
                                              * to be executed on this backend server */
     std::string m_uri;                      /**< The combined address and port */
+
+    maxbase::StopWatch     m_session_timer;
+    maxbase::IntervalTimer m_select_timer;
+    int64_t                m_num_selects = 0;
 };
 
 typedef std::shared_ptr<Backend> SBackend;
diff --git a/include/maxscale/session_stats.hh b/include/maxscale/session_stats.hh
new file mode 100644
index 000000000..d5c9984d1
--- /dev/null
+++ b/include/maxscale/session_stats.hh
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+#pragma once
+
+#include <maxscale/ccdefs.hh>
+
+
+#include <map>
+
+#include <maxscale/server.h>
+#include <maxbase/average.hh>
+#include <maxbase/stopwatch.hh>
+
+namespace maxscale
+{
+
+/** ServerStats is a class to hold server statistics associated with a router */
+class ServerStats
+{
+
+public:
+    struct CurrentStats
+    {
+        maxbase::Duration ave_session_dur;
+        double            ave_session_active_pct;
+        int64_t           ave_session_selects;
+        int64_t           total_queries;
+        int64_t           total_read_queries;
+        int64_t           total_write_queries;
+    };
+
+    void start_session();
+    void end_session(maxbase::Duration sess_duration, maxbase::Duration active_duration, int64_t num_selects);
+
+    CurrentStats current_stats() const;
+
+    ServerStats& operator+=(const ServerStats& rhs);
+
+    // These are exactly what they were in struct ServerStats, in readwritesplit.hh.
+    // (well, but I changed uint64_t to int64_t).
+    // TODO make these private, and add functions to modify them.
+    int64_t total = 0;
+    int64_t read = 0;
+    int64_t write = 0;
+
+private:
+    maxbase::CumulativeAverage m_ave_session_dur;
+    maxbase::CumulativeAverage m_ave_active_dur;
+    maxbase::CumulativeAverage m_num_ave_session_selects;
+};
+
+using SrvStatMap = std::map<SERVER*, ServerStats>;
+}
diff --git a/server/core/backend.cc b/server/core/backend.cc
index 2d8f93681..f8ee909c3 100644
--- a/server/core/backend.cc
+++ b/server/core/backend.cc
@@ -259,3 +259,29 @@ bool Backend::write_stored_command()
 
     return rval;
 }
+
+const maxbase::StopWatch& Backend::session_timer() const
+{
+    return m_session_timer;
+}
+
+const maxbase::IntervalTimer& Backend::select_timer() const
+{
+    return m_select_timer;
+}
+
+void Backend::select_started()
+{
+    m_select_timer.start_interval();
+}
+
+void Backend::select_ended()
+{
+    m_select_timer.end_interval();
+    ++m_num_selects;
+}
+
+int64_t Backend::num_selects() const
+{
+    return m_num_selects;
+}
diff --git a/server/core/session_stats.cc b/server/core/session_stats.cc
new file mode 100644
index 000000000..0a813b513
--- /dev/null
+++ b/server/core/session_stats.cc
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#include <maxscale/session_stats.hh>
+#include <iostream>
+
+void maxscale::ServerStats::start_session()
+{
+    // nop for now
+}
+
+void maxscale::ServerStats::end_session(maxbase::Duration sess_duration,
+                                        maxbase::Duration active_duration,
+                                        int64_t num_selects)
+{
+    m_ave_session_dur.add(sess_duration.secs());
+    m_ave_active_dur.add(active_duration.secs());
+    m_num_ave_session_selects.add(num_selects);
+}
+
+maxscale::ServerStats& maxscale::ServerStats::operator+=(const maxscale::ServerStats& rhs)
+{
+    total += rhs.total;
+    read += rhs.read;
+    write += rhs.write;
+    m_ave_session_dur += rhs.m_ave_session_dur;
+    m_ave_active_dur += rhs.m_ave_active_dur;
+    m_num_ave_session_selects += rhs.m_num_ave_session_selects;
+
+    return *this;
+}
+
+maxscale::ServerStats::CurrentStats maxscale::ServerStats::current_stats() const
+{
+    double sess_secs = m_ave_session_dur.average();
+    double active_secs = m_ave_active_dur.average();
+    double active = 100 * active_secs / sess_secs;
+
+    return {maxbase::Duration(sess_secs),
+            active,
+            static_cast<int64_t>(m_num_ave_session_selects.average()),
+            total,
+            read,
+            write};
+}