--- a/src/os/win32/ngx_wsarecv.c
+++ b/src/os/win32/ngx_wsarecv.c
@@ -25,7 +25,7 @@ ssize_t ngx_wsarecv(ngx_connection_t *c,
     rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, NULL, NULL);
 
     ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
-                   "WSARecv: fd:%d rc:%d %d of %d", c->fd, rc, bytes, size);
+                   "WSARecv: fd:%d rc:%d %ul of %z", c->fd, rc, bytes, size);
 
     rev = c->read;
 
@@ -85,6 +85,10 @@ ssize_t ngx_overlapped_wsarecv(ngx_conne
                 return NGX_ERROR;
             }
 
+            ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
+                           "WSARecv ovlp: fd:%d %ul of %z",
+                           c->fd, rev->available, size);
+
             return rev->available;
         }
 
@@ -95,6 +99,9 @@ ssize_t ngx_overlapped_wsarecv(ngx_conne
             return NGX_ERROR;
         }
 
+        ngx_log_debug3(NGX_LOG_DEBUG_EVENT, c->log, 0,
+                       "WSARecv: fd:%d %ul of %z", c->fd, bytes, size);
+
         return bytes;
     }
 
@@ -110,12 +117,15 @@ ssize_t ngx_overlapped_wsarecv(ngx_conne
     rev->complete = 0;
 
     ngx_log_debug4(NGX_LOG_DEBUG_EVENT, c->log, 0,
-                   "WSARecv: fd:%d rc:%d %d of %d", c->fd, rc, bytes, size);
+                   "WSARecv ovlp: fd:%d rc:%d %ul of %z",
+                   c->fd, rc, bytes, size);
 
     if (rc == -1) {
         err = ngx_socket_errno;
         if (err == WSA_IO_PENDING) {
             rev->active = 1;
+            ngx_log_debug0(NGX_LOG_DEBUG_EVENT, c->log, err,
+                           "WSARecv() posted");
             return NGX_AGAIN;
         }
 
@@ -148,94 +158,3 @@ ssize_t ngx_overlapped_wsarecv(ngx_conne
 
     return bytes;
 }
-
-#if 0
-
-/* DELELTE IT WHEN ABOVE FUNC WOULD BE TESTED */
-
-ssize_t ngx_wsarecv(ngx_connection_t *c, char *buf, size_t size)
-{
-    int               rc;
-    u_int             flags;
-    size_t            bytes;
-    WSABUF            wsabuf[1];
-    ngx_err_t         err;
-    ngx_event_t      *rev;
-    LPWSAOVERLAPPED   ovlp;
-
-    rev = c->read;
-    bytes = 0;
-
-    if ((ngx_event_flags & NGX_USE_AIO_EVENT) && rev->ready) {
-        rev->ready = 0;
-
-        /* the overlapped WSARecv() completed */
-
-        if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
-            if (rev->ovlp.error) {
-                ngx_log_error(NGX_LOG_ERR, c->log, rev->ovlp.error,
-                              "WSARecv() failed");
-                return NGX_ERROR;
-            }
-
-            return rev->available;
-        }
-
-        if (WSAGetOverlappedResult(c->fd, (LPWSAOVERLAPPED) &rev->ovlp,
-                                   &bytes, 0, NULL) == 0) {
-            err = ngx_socket_errno;
-            ngx_log_error(NGX_LOG_CRIT, c->log, err,
-                         "WSARecv() or WSAGetOverlappedResult() failed");
-
-            return NGX_ERROR;
-        }
-
-        return bytes;
-    }
-
-    if (ngx_event_flags & NGX_USE_AIO_EVENT) {
-        ovlp = (LPWSAOVERLAPPED) &c->read->ovlp;
-        ngx_memzero(ovlp, sizeof(WSAOVERLAPPED));
-
-    } else {
-        ovlp = NULL;
-    }
-
-    wsabuf[0].buf = buf;
-    wsabuf[0].len = size;
-    flags = 0;
-
-    rc = WSARecv(c->fd, wsabuf, 1, &bytes, &flags, ovlp, NULL);
-
-    ngx_log_debug(c->log, "WSARecv: %d:%d" _ rc _ bytes);
-
-    if (rc == -1) {
-        err = ngx_socket_errno;
-        if (err == WSA_IO_PENDING) {
-            return NGX_AGAIN;
-
-        } else if (err == WSAEWOULDBLOCK) {
-            ngx_log_error(NGX_LOG_INFO, c->log, err, "WSARecv() EAGAIN");
-            return NGX_AGAIN;
-
-        } else {
-            ngx_log_error(NGX_LOG_CRIT, c->log, err, "WSARecv() failed");
-            return NGX_ERROR;
-        }
-    }
-
-    if (ngx_event_flags & NGX_USE_IOCP_EVENT) {
-
-        /*
-         * If a socket was bound with I/O completion port
-         * then GetQueuedCompletionStatus() would anyway return its status
-         * despite that WSARecv() was already completed.
-         */
-
-        return NGX_AGAIN;
-    }
-
-    return bytes;
-}
-
-#endif