diff --git a/example/bench.cpp b/example/bench.cpp
index 7bbaeb06..18118424 100644
--- a/example/bench.cpp
+++ b/example/bench.cpp
@@ -24,7 +24,7 @@ int main(int argc, char* argv[])
         console->set_level(c11log::level::INFO);
         console->info("Starting bench with", howmany, "iterations..");
 
-        auto bench = c11log::create<sinks::rotating_file_sink_st>("bench", "myrotating", "txt", 1024 * 1024 * 5, 3, 0);
+        auto bench = c11log::create<sinks::rotating_file_sink_st>("bench", "myrotating", "txt", 1024 * 1024 * 1, 3, 0);
 
         //auto bench = c11log::create<sinks::simple_file_sink_st>("bench", "simplelog.txt", 1);
         //auto bench = c11log::create<sinks::null_sink_st>("bench");
diff --git a/include/c11log/sinks/base_sink.h b/include/c11log/sinks/base_sink.h
index 43aa4c8a..6b8244c1 100644
--- a/include/c11log/sinks/base_sink.h
+++ b/include/c11log/sinks/base_sink.h
@@ -1,4 +1,9 @@
 #pragma once
+//
+// base sink templated over a mutex (either dummy or realy)
+// concrete implementation should only overrid the _sink_it method.
+// all locking is taken care of here so no locking needed by the implementors..
+//
 
 #include<string>
 #include<mutex>
diff --git a/include/c11log/sinks/file_sinks.h b/include/c11log/sinks/file_sinks.h
index a5c3b6c5..15f3e7d6 100644
--- a/include/c11log/sinks/file_sinks.h
+++ b/include/c11log/sinks/file_sinks.h
@@ -86,20 +86,18 @@ private:
 
     // Rotate files:
     // log.txt -> log.1.txt
-    // ..
-    // log.n.txt -> log.n+1.txt
+    // log.1.txt -> log2.txt
+    // log.2.txt -> log3.txt
+    // log.3.txt -> delete
 
 
     void _rotate()
     {
         _file_helper.close();
-        //Remove oldest file
         for (auto i = _max_files; i > 0; --i)
         {
             std::string src = _calc_filename(_base_filename, i - 1, _extension);
             std::string target = _calc_filename(_base_filename, i, _extension);
-            if (i == _max_files)
-                std::remove(target.c_str());
             std::rename(src.c_str(), target.c_str());
         }
         _file_helper.open(_calc_filename(_base_filename, 0, _extension));