new configuration: audit_json_file_bufsize . Controls the buffer size used when logging to a file. Value of 0 means default size, value of 1 means no buffering.

include/audit_handler.h

@@ -554,7 +554,7 @@ class Audit_file_handler: public Audit_io_handler
 public:
 
     Audit_file_handler() :
-        m_sync_period(0), m_log_file(NULL), m_sync_counter(0)
+        m_sync_period(0), m_log_file(NULL), m_sync_counter(0), m_bufsize(0)
     {
 		m_io_type = "file";
     }
@@ -571,6 +571,11 @@ public:
      */
     unsigned int m_sync_period;
     
+    /**
+     * The buf size used by the file stream. 0 = use default, negative or 1 = no buffering
+     */
+    long m_bufsize;
+    
     /**
      * Write function we pass to formatter
      */