diff --git a/src/Monolog/Processor/MemoryPeakUsageProcessor.php b/src/Monolog/Processor/MemoryPeakUsageProcessor.php
index e48672bf..552fd709 100644
--- a/src/Monolog/Processor/MemoryPeakUsageProcessor.php
+++ b/src/Monolog/Processor/MemoryPeakUsageProcessor.php
@@ -26,7 +26,7 @@ class MemoryPeakUsageProcessor extends MemoryProcessor
     public function __invoke(array $record)
     {
         $bytes = memory_get_peak_usage($this->realUsage);
-        $formatted = self::formatBytes($bytes);
+        $formatted = $this->formatBytes($bytes);
 
         $record['extra'] = array_merge(
             $record['extra'],
diff --git a/src/Monolog/Processor/MemoryProcessor.php b/src/Monolog/Processor/MemoryProcessor.php
index 7551043e..9058b57f 100644
--- a/src/Monolog/Processor/MemoryProcessor.php
+++ b/src/Monolog/Processor/MemoryProcessor.php
@@ -18,26 +18,38 @@ namespace Monolog\Processor;
  */
 abstract class MemoryProcessor
 {
+    /**
+     * @var boolean Set this to true to get the real size of memory allocated from system.
+     * If not set or false only the memory used by emalloc() is reported.
+     */
     protected $realUsage;
 
+    protected $useFormatting;
+
     /**
-     * @param boolean $realUsage
+     * @param boolean $realUsage Set this to true to get the real size of memory allocated from system.
+     * @param bool    $useFormatting If true, then format memory size to human readable string (MB, KB, B depending on size)
      */
-    public function __construct($realUsage = true)
+    public function __construct($realUsage = true, $useFormatting = true)
     {
         $this->realUsage = (boolean) $realUsage;
+        $this->useFormatting = (boolean) $useFormatting;
     }
 
     /**
-     * Formats bytes into a human readable string
+     * Formats bytes into a human readable string (if $this->useFormatting is true)
      *
      * @param  int    $bytes
-     * @return string
+     * @return string|int
      */
-    protected static function formatBytes($bytes)
+    protected function formatBytes($bytes)
     {
         $bytes = (int) $bytes;
 
+        if (!$this->useFormatting) {
+            return $bytes;
+        }
+
         if ($bytes > 1024*1024) {
             return round($bytes/1024/1024, 2).' MB';
         } elseif ($bytes > 1024) {
diff --git a/src/Monolog/Processor/MemoryUsageProcessor.php b/src/Monolog/Processor/MemoryUsageProcessor.php
index 2c4a8079..0c4dd9ab 100644
--- a/src/Monolog/Processor/MemoryUsageProcessor.php
+++ b/src/Monolog/Processor/MemoryUsageProcessor.php
@@ -26,7 +26,7 @@ class MemoryUsageProcessor extends MemoryProcessor
     public function __invoke(array $record)
     {
         $bytes = memory_get_usage($this->realUsage);
-        $formatted = self::formatBytes($bytes);
+        $formatted = $this->formatBytes($bytes);
 
         $record['extra'] = array_merge(
             $record['extra'],
diff --git a/tests/Monolog/Processor/MemoryPeakUsageProcessorTest.php b/tests/Monolog/Processor/MemoryPeakUsageProcessorTest.php
index 4bdf22c3..eb666144 100644
--- a/tests/Monolog/Processor/MemoryPeakUsageProcessorTest.php
+++ b/tests/Monolog/Processor/MemoryPeakUsageProcessorTest.php
@@ -26,4 +26,17 @@ class MemoryPeakUsageProcessorTest extends TestCase
         $this->assertArrayHasKey('memory_peak_usage', $record['extra']);
         $this->assertRegExp('#[0-9.]+ (M|K)?B$#', $record['extra']['memory_peak_usage']);
     }
+
+    /**
+     * @covers Monolog\Processor\MemoryPeakUsageProcessor::__invoke
+     * @covers Monolog\Processor\MemoryProcessor::formatBytes
+     */
+    public function testProcessorWithoutFormatting()
+    {
+        $processor = new MemoryPeakUsageProcessor(true, false);
+        $record = $processor($this->getRecord());
+        $this->assertArrayHasKey('memory_peak_usage', $record['extra']);
+        $this->assertInternalType('int', $record['extra']['memory_peak_usage']);
+        $this->assertGreaterThan(0, $record['extra']['memory_peak_usage']);
+    }
 }
diff --git a/tests/Monolog/Processor/MemoryUsageProcessorTest.php b/tests/Monolog/Processor/MemoryUsageProcessorTest.php
index a30d6de6..4692dbfc 100644
--- a/tests/Monolog/Processor/MemoryUsageProcessorTest.php
+++ b/tests/Monolog/Processor/MemoryUsageProcessorTest.php
@@ -26,4 +26,17 @@ class MemoryUsageProcessorTest extends TestCase
         $this->assertArrayHasKey('memory_usage', $record['extra']);
         $this->assertRegExp('#[0-9.]+ (M|K)?B$#', $record['extra']['memory_usage']);
     }
+
+    /**
+     * @covers Monolog\Processor\MemoryUsageProcessor::__invoke
+     * @covers Monolog\Processor\MemoryProcessor::formatBytes
+     */
+    public function testProcessorWithoutFormatting()
+    {
+        $processor = new MemoryUsageProcessor(true, false);
+        $record = $processor($this->getRecord());
+        $this->assertArrayHasKey('memory_usage', $record['extra']);
+        $this->assertInternalType('int', $record['extra']['memory_usage']);
+        $this->assertGreaterThan(0, $record['extra']['memory_usage']);
+    }
 }