diff --git a/components/ILIAS/Authentication/classes/class.ilSessionStatistics.php b/components/ILIAS/Authentication/classes/class.ilSessionStatistics.php
index 8ed679c53efe..45dbec70c809 100755
--- a/components/ILIAS/Authentication/classes/class.ilSessionStatistics.php
+++ b/components/ILIAS/Authentication/classes/class.ilSessionStatistics.php
@@ -22,6 +22,8 @@ class ilSessionStatistics
 {
     private const int SLOT_SIZE = 15;
 
+    protected static ?ilDBStatement $number_of_active_raw_sessions_statement = null;
+
     /**
      * Is session statistics active at all?
      */
@@ -171,19 +173,16 @@ protected static function getNumberOfActiveRawSessions(int $a_time): int
 
         $ilDB = $DIC['ilDB'];
 
-        $sql = 'SELECT COUNT(*) counter FROM usr_session_stats_raw' .
-            ' WHERE (end_time IS NULL OR end_time >= ' . $ilDB->quote($a_time, 'integer') . ')' .
-            ' AND start_time <= ' . $ilDB->quote($a_time, 'integer') .
-            ' AND ' . $ilDB->in('type', ilSessionControl::$session_types_controlled, false, 'integer');
-        $res = $ilDB->query($sql);
-        $row = $ilDB->fetchAssoc($res);
+        $statement = self::getNumberOfActiveRawSessionsPreparedStatement();
+        $row = $DIC->database()->fetchAssoc($DIC->database()->execute($statement, [$a_time, $a_time]));
         return (int) $row['counter'];
     }
 
     /**
      * Read raw data for timespan
+     * @return Generator<list<array{start_time: int, end_time: ?int, end_context: ?int}>>
      */
-    protected static function getRawData(int $a_begin, int $a_end): array
+    protected static function getRawData(int $a_begin, int $a_end): Generator
     {
         global $DIC;
 
@@ -195,11 +194,9 @@ protected static function getRawData(int $a_begin, int $a_end): array
             ' AND ' . $ilDB->in('type', ilSessionControl::$session_types_controlled, false, 'integer') .
             ' ORDER BY start_time';
         $res = $ilDB->query($sql);
-        $all = [];
         while ($row = $ilDB->fetchAssoc($res)) {
-            $all[] = $row;
+            yield $row;
         }
-        return $all;
     }
 
     /**
@@ -247,25 +244,89 @@ public static function aggretateRaw(int $a_now): void
         }
 
         $slot = self::createNewAggregationSlot($a_now);
+        $prepared_statement = self::getAggregatedRawDataPreparedStatement();
+        $raw_data = [];
         while (is_array($slot)) {
-            self::aggregateRawHelper($slot[0], $slot[1]);
+            $raw_data[] = self::aggregateRawHelper($slot[0], $slot[1]);
             $slot = self::createNewAggregationSlot($a_now);
         }
 
+        if ($raw_data !== []) {
+            global $DIC;
+            $DIC->database()->executeMultiple($prepared_statement, $raw_data);
+        }
+
         // #12728
         self::deleteAggregatedRaw($a_now);
     }
 
+    protected static function getNumberOfActiveRawSessionsPreparedStatement(): ilDbStatement
+    {
+        if (self::$number_of_active_raw_sessions_statement === null) {
+            global $DIC;
+            self::$number_of_active_raw_sessions_statement = $DIC->database()->prepare(
+                'SELECT COUNT(*) counter FROM usr_session_stats_raw '
+                . 'WHERE (end_time IS NULL OR end_time >= ?) '
+                . 'AND start_time <= ? '
+                . 'AND ' . $DIC->database()->in('type', ilSessionControl::$session_types_controlled, false, 'integer'),
+                [ilDBConstants::T_INTEGER, ilDBConstants::T_INTEGER]
+            );
+        }
+
+        return self::$number_of_active_raw_sessions_statement;
+    }
+
+    protected static function getAggregatedRawDataPreparedStatement(): ilDBStatement
+    {
+        global $DIC;
+        return $DIC->database()->prepareManip(
+            'UPDATE usr_session_stats '
+            . 'SET active_min = ?, '
+            . 'active_max = ?, '
+            . 'active_avg = ?, '
+            . 'active_end = ?, '
+            . 'opened = ?, '
+            . 'closed_manual = ?, '
+            . 'closed_expire = ?, '
+            . 'closed_login = ?, '
+            . 'closed_misc = ? '
+            . 'WHERE slot_begin = ? AND slot_end = ?',
+            [
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER,
+                ilDBConstants::T_INTEGER
+            ]
+        );
+    }
+
     /**
      * Aggregate statistics data for one slot
-     *
+     * @return array{
+     *     active_min: int,
+     *     active_max: int,
+     *     active_avg: float|int,
+     *     active_end: int,
+     *     opened: int,
+     *     closed_manual: int,
+     *     closed_expire: int,
+     *     closed_login: int,
+     *     closed_misc: int,
+     *     slot_begin: int,
+     *     slot_end: int
+     * }
      */
-    public static function aggregateRawHelper(int $a_begin, int $a_end): void
+    public static function aggregateRawHelper(int $a_begin, int $a_end): array
     {
         global $DIC;
 
-        $ilDB = $DIC['ilDB'];
-
         // "relevant" closing types
         $separate_closed = [
             ilSession::SESSION_CLOSE_USER,
@@ -355,26 +416,19 @@ public static function aggregateRawHelper(int $a_begin, int $a_end): void
         }
         unset($events);
 
-        // save aggregated data
-        $fields = [
-            'active_min' => ['integer', $active_min],
-            'active_max' => ['integer', $active_max],
-            'active_avg' => ['integer', $active_avg],
-            'active_end' => ['integer', $active_end],
-            'opened' => ['integer', $opened_counter],
-            'closed_manual' => ['integer', (int) ($closed_counter[ilSession::SESSION_CLOSE_USER] ?? 0)],
-            'closed_expire' => ['integer', (int) ($closed_counter[ilSession::SESSION_CLOSE_EXPIRE] ?? 0)],
-            'closed_login' => ['integer', (int) ($closed_counter[ilSession::SESSION_CLOSE_LOGIN] ?? 0)],
-            'closed_misc' => ['integer', (int) ($closed_counter[0] ?? 0)],
+        return [
+            'active_min' => $active_min,
+            'active_max' => $active_max,
+            'active_avg' => $active_avg,
+            'active_end' => $active_end,
+            'opened' => $opened_counter,
+            'closed_manual' => (int) ($closed_counter[ilSession::SESSION_CLOSE_USER] ?? 0),
+            'closed_expire' => (int) ($closed_counter[ilSession::SESSION_CLOSE_EXPIRE] ?? 0),
+            'closed_login' => (int) ($closed_counter[ilSession::SESSION_CLOSE_LOGIN] ?? 0),
+            'closed_misc' => (int) ($closed_counter[0] ?? 0),
+            'slot_begin' => $a_begin,
+            'slot_end' => $a_end,
         ];
-        $ilDB->update(
-            'usr_session_stats',
-            $fields,
-            [
-                'slot_begin' => ['integer', $a_begin],
-                'slot_end' => ['integer', $a_end]
-            ]
-        );
     }
 
     /**