diff --git a/src/http/modules/ngx_http_auth_basic_module.c b/src/http/modules/ngx_http_auth_basic_module.c
index cf85557..48192ca 100644
--- a/src/http/modules/ngx_http_auth_basic_module.c
+++ b/src/http/modules/ngx_http_auth_basic_module.c
@@ -379,6 +379,8 @@
     if (ngx_strcmp(realm->data, "off") == 0) {
         realm->len = 0;
         realm->data = (u_char *) "";
+
+        return NGX_CONF_OK;
     }
 
     len = sizeof("Basic realm=\"") - 1 + realm->len + 1;
diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
index 125b8e0..45b6e73 100644
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -1419,7 +1419,8 @@
 {
     ngx_http_variable_t  *var;
 
-    var = ngx_http_add_variable(cf, &ngx_http_fastcgi_script_name, 0);
+    var = ngx_http_add_variable(cf, &ngx_http_fastcgi_script_name,
+                                NGX_HTTP_VAR_NOHASH);
     if (var == NULL) {
         return NGX_ERROR;
     }
diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
index 8231de1..bf7b925 100644
--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -130,18 +130,14 @@
     var->handler = ngx_http_geo_variable;
     var->data = (uintptr_t) tree;
 
-    /*
-     * create the temporary pool of a huge initial size
-     * to process quickly a large number of geo lines
-     */
-
-    pool = ngx_create_pool(512 * 1024, cf->log);
+    pool = ngx_create_pool(16384, cf->log);
     if (pool == NULL) {
         return NGX_CONF_ERROR;
     }
 
     if (ngx_array_init(&geo.values, pool, 512,
-                       sizeof(ngx_http_variable_value_t *)) == NGX_ERROR)
+                       sizeof(ngx_http_variable_value_t *))
+        == NGX_ERROR)
     {
         ngx_destroy_pool(pool);
         return NGX_CONF_ERROR;
diff --git a/src/http/modules/ngx_http_gzip_filter_module.c b/src/http/modules/ngx_http_gzip_filter_module.c
index 66d5935..e819759 100644
--- a/src/http/modules/ngx_http_gzip_filter_module.c
+++ b/src/http/modules/ngx_http_gzip_filter_module.c
@@ -961,7 +961,7 @@
     ngx_http_variable_t     *var;
     ngx_http_log_op_name_t  *op;
 
-    var = ngx_http_add_variable(cf, &ngx_http_gzip_ratio, 0);
+    var = ngx_http_add_variable(cf, &ngx_http_gzip_ratio, NGX_HTTP_VAR_NOHASH);
     if (var == NULL) {
         return NGX_ERROR;
     }
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
index 8278d34..afadc18 100644
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -359,20 +359,20 @@
 static ngx_http_variable_t  ngx_http_proxy_vars[] = {
 
     { ngx_string("proxy_host"), ngx_http_proxy_host_variable, 0,
-      NGX_HTTP_VAR_CHANGABLE, 0 },
+      NGX_HTTP_VAR_CHANGABLE|NGX_HTTP_VAR_NOHASH, 0 },
 
     { ngx_string("proxy_port"), ngx_http_proxy_port_variable, 0,
-      NGX_HTTP_VAR_CHANGABLE, 0 },
+      NGX_HTTP_VAR_CHANGABLE|NGX_HTTP_VAR_NOHASH, 0 },
 
     { ngx_string("proxy_add_x_forwarded_for"),
-      ngx_http_proxy_add_x_forwarded_for_variable, 0, 0, 0 },
+      ngx_http_proxy_add_x_forwarded_for_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
 
 #if 0
-    { ngx_string("proxy_add_via"), NULL, 0, 0, 0 },
+    { ngx_string("proxy_add_via"), NULL, 0, NGX_HTTP_VAR_NOHASH, 0 },
 #endif
 
     { ngx_string("proxy_internal_body_length"),
-      ngx_http_proxy_internal_body_length_variable, 0, 0, 0 },
+      ngx_http_proxy_internal_body_length_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
 
     { ngx_null_string, NULL, 0, 0, 0 }
 };
diff --git a/src/http/modules/ngx_http_referer_module.c b/src/http/modules/ngx_http_referer_module.c
index a3d3d46..cd8be78 100644
--- a/src/http/modules/ngx_http_referer_module.c
+++ b/src/http/modules/ngx_http_referer_module.c
@@ -217,7 +217,8 @@
     name.len = sizeof("invalid_referer") - 1;
     name.data = (u_char *) "invalid_referer";
 
-    var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGABLE);
+    var = ngx_http_add_variable(cf, &name,
+                                NGX_HTTP_VAR_CHANGABLE|NGX_HTTP_VAR_NOHASH);
     if (var == NULL) {
         return NGX_CONF_ERROR;
     }
diff --git a/src/http/modules/ngx_http_ssi_filter_module.c b/src/http/modules/ngx_http_ssi_filter_module.c
index 6f4ac45..dd0e92f 100644
--- a/src/http/modules/ngx_http_ssi_filter_module.c
+++ b/src/http/modules/ngx_http_ssi_filter_module.c
@@ -648,13 +648,17 @@
 
                 rc = cmd->handler(r, ctx, params);
 
-                if (c->closed) {
+                if (c->destroyed) {
                     return NGX_DONE;
                 }
 
                 if (rc == NGX_OK) {
                     continue;
                 }
+
+                if (rc == NGX_ERROR) {
+                    return NGX_ERROR;
+                }
             }
 
 
diff --git a/src/http/modules/ngx_http_static_module.c b/src/http/modules/ngx_http_static_module.c
index 808d945..1504f24 100644
--- a/src/http/modules/ngx_http_static_module.c
+++ b/src/http/modules/ngx_http_static_module.c
@@ -244,6 +244,12 @@
         return NGX_HTTP_INTERNAL_SERVER_ERROR;
     }
 
+    r->allow_ranges = 1;
+
+    if (r->header_only || (r->main != r && ngx_file_size(&fi) == 0)) {
+        return ngx_http_send_header(r);
+    }
+
     /* we need to allocate all before the header would be sent */
 
     b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
@@ -256,11 +262,9 @@
         return NGX_HTTP_INTERNAL_SERVER_ERROR;
     }
 
-    r->allow_ranges = 1;
-
     rc = ngx_http_send_header(r);
 
-    if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
+    if (rc == NGX_ERROR || rc > NGX_OK) {
         return rc;
     }
 
diff --git a/src/http/modules/ngx_http_userid_filter_module.c b/src/http/modules/ngx_http_userid_filter_module.c
index c77dca2..159bd34 100644
--- a/src/http/modules/ngx_http_userid_filter_module.c
+++ b/src/http/modules/ngx_http_userid_filter_module.c
@@ -554,7 +554,7 @@
     ngx_http_variable_t     *var;
     ngx_http_log_op_name_t  *op;
 
-    var = ngx_http_add_variable(cf, &ngx_http_userid_got, 0);
+    var = ngx_http_add_variable(cf, &ngx_http_userid_got, NGX_HTTP_VAR_NOHASH);
     if (var == NULL) {
         return NGX_ERROR;
     }
@@ -562,7 +562,7 @@
     var->handler = ngx_http_userid_variable;
     var->data = offsetof(ngx_http_userid_ctx_t, uid_got);
 
-    var = ngx_http_add_variable(cf, &ngx_http_userid_set, 0);
+    var = ngx_http_add_variable(cf, &ngx_http_userid_set, NGX_HTTP_VAR_NOHASH);
     if (var == NULL) {
         return NGX_ERROR;
     }
diff --git a/src/http/ngx_http_copy_filter_module.c b/src/http/ngx_http_copy_filter_module.c
index c251273..bba3f5d 100644
--- a/src/http/ngx_http_copy_filter_module.c
+++ b/src/http/ngx_http_copy_filter_module.c
@@ -70,11 +70,15 @@
 static ngx_int_t
 ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in)
 {
+    ngx_int_t                     rc;
+    ngx_connection_t             *c;
     ngx_output_chain_ctx_t       *ctx;
     ngx_http_copy_filter_conf_t  *conf;
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "copy filter: \"%V\"", &r->uri);
+    c = r->connection;
+
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
+                   "copy filter: \"%V?%V\"", &r->uri, &r->args);
 
     ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module);
 
@@ -88,7 +92,7 @@
 
         ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module);
 
-        ctx->sendfile = r->connection->sendfile;
+        ctx->sendfile = c->sendfile;
         ctx->need_in_memory = r->main_filter_need_in_memory
                               || r->filter_need_in_memory;
         ctx->need_in_temp = r->filter_need_temporary;
@@ -102,9 +106,16 @@
 
     }
 
-    /* the request pool may be already destroyed after ngx_output_chain()*/
+    rc = ngx_output_chain(ctx, in);
 
-    return ngx_output_chain(ctx, in);
+#if (NGX_DEBUG)
+    if (!c->destroyed) {
+        ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                       "copy filter: %i \"%V?%V\"", rc, &r->uri, &r->args);
+    }
+#endif
+
+    return rc;
 }
 
 
diff --git a/src/http/ngx_http_core_module.c b/src/http/ngx_http_core_module.c
index 4743389..c100bee 100644
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -966,14 +966,14 @@
 {
     ngx_int_t  rc;
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http output filter \"%V\"", &r->uri);
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http output filter \"%V?%V\"", &r->uri, &r->args);
 
     rc = ngx_http_top_body_filter(r, in);
 
     if (rc == NGX_ERROR) {
         /* NGX_ERROR may be returned by any filter */
-        r->connection->closed = 1;
+        r->connection->error = 1;
     }
 
     return rc;
@@ -1080,6 +1080,7 @@
 ngx_http_subrequest(ngx_http_request_t *r,
     ngx_str_t *uri, ngx_str_t *args, ngx_uint_t flags)
 {
+    ngx_connection_t              *c;
     ngx_http_request_t            *sr;
     ngx_http_core_srv_conf_t      *cscf;
     ngx_http_postponed_request_t  *pr, *p;
@@ -1090,7 +1091,9 @@
     }
 
     sr->signature = NGX_HTTP_MODULE;
-    sr->connection = r->connection;
+
+    c = r->connection;
+    sr->connection = c;
 
     sr->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module);
     if (sr->ctx == NULL) {
@@ -1128,16 +1131,13 @@
     sr->request_line = r->request_line;
     sr->uri = *uri;
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http subrequest \"%V\"", uri);
-
     if (args) {
         sr->args = *args;
-
-        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http subrequest args \"%V\"", args);
     }
 
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
+                   "http subrequest \"%V?%V\"", uri, &sr->args);
+
     if (flags & NGX_HTTP_ZERO_IN_URI) {
         sr->zero_in_uri = 1;
     }
@@ -1155,8 +1155,8 @@
     sr->read_event_handler = ngx_http_request_empty_handler;
     sr->write_event_handler = ngx_http_request_empty_handler;
 
-    if (r->connection->data == r) {
-        sr->connection->data = sr;
+    if (c->data == r) {
+        c->data = sr;
     }
 
     sr->in_addr = r->in_addr;
@@ -1192,7 +1192,12 @@
 
     ngx_http_handler(sr);
 
-    /* the request pool may be already destroyed */
+#if (NGX_LOG_DEBUG)
+    if (!c->destroyed) {
+        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
+                       "http subrequest done \"%V?%V\"", uri, &sr->args);
+    }
+#endif
 
     return NGX_OK;
 }
@@ -1204,22 +1209,19 @@
 {
     ngx_http_core_srv_conf_t  *cscf;
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "internal redirect: \"%V\"", uri);
-
     r->uri = *uri;
 
     if (args) {
         r->args = *args;
 
-        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "internal redirect args: \"%V\"", args);
-
     } else {
         r->args.len = 0;
         r->args.data = NULL;
     }
 
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "internal redirect: \"%V?%V\"", uri, &r->args);
+
     if (ngx_http_set_exten(r) != NGX_OK) {
         return NGX_HTTP_INTERNAL_SERVER_ERROR;
     }
diff --git a/src/http/ngx_http_postpone_filter_module.c b/src/http/ngx_http_postpone_filter_module.c
index 9c56f46..478393c 100644
--- a/src/http/ngx_http_postpone_filter_module.c
+++ b/src/http/ngx_http_postpone_filter_module.c
@@ -9,6 +9,8 @@
 #include <ngx_http.h>
 
 
+static ngx_int_t
+    ngx_http_postpone_filter_output_postponed_request(ngx_http_request_t *r);
 static ngx_int_t ngx_http_postpone_filter_init(ngx_cycle_t *cycle);
 
 
@@ -53,8 +55,8 @@
     ngx_chain_t                   *out;
     ngx_http_postponed_request_t  *pr, **ppr;
 
-    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http postpone filter \"%V\" %p", &r->uri, in);
+    ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http postpone filter \"%V?%V\" %p", &r->uri, &r->args, in);
 
     if (r != r->connection->data || (r->postponed && in)) {
 
@@ -104,14 +106,25 @@
         return NGX_OK;
     }
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http postpone filter out \"%V\"", &r->uri);
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http postpone filter out \"%V?%V\"", &r->uri, &r->args);
 
     rc = ngx_http_next_filter(r->main, out);
 
     if (rc == NGX_ERROR) {
         /* NGX_ERROR may be returned by any filter */
-        r->connection->closed = 1;
+        r->connection->error = 1;
+    }
+
+    if (r->postponed == NULL) {
+        return rc;
+    }
+
+    rc = ngx_http_postpone_filter_output_postponed_request(r);
+
+    if (rc == NGX_ERROR) {
+        /* NGX_ERROR may be returned by any filter */
+        r->connection->error = 1;
     }
 
     return rc;
@@ -119,6 +132,55 @@
 
 
 static ngx_int_t
+ngx_http_postpone_filter_output_postponed_request(ngx_http_request_t *r)
+{
+    ngx_int_t                      rc;
+    ngx_http_postponed_request_t  *pr;
+
+    for ( ;; ) {
+        pr = r->postponed;
+
+        if (pr == NULL) {
+            return NGX_OK;
+        }
+
+        if (pr->request) {
+
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http postpone filter handle \"%V?%V\"",
+                           &pr->request->uri, &pr->request->args);
+
+            if (!pr->request->done) {
+                r->connection->data = pr->request;
+                return NGX_AGAIN;
+            }
+
+            rc = ngx_http_postpone_filter_output_postponed_request(pr->request);
+
+            if (rc == NGX_AGAIN || rc == NGX_ERROR) {
+                return rc;
+            }
+
+            r->postponed = r->postponed->next;
+            pr = r->postponed;
+        }
+
+        if (pr->out) {
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http postpone filter out postponed \"%V?%V\"",
+                           &r->uri, &r->args);
+
+            if (ngx_http_next_filter(r->main, pr->out) == NGX_ERROR) {
+                return NGX_ERROR;
+            }
+        }
+
+        r->postponed = r->postponed->next;
+    }
+}
+
+
+static ngx_int_t
 ngx_http_postpone_filter_init(ngx_cycle_t *cycle)
 {
     ngx_http_next_filter = ngx_http_top_body_filter;
diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index f695056..569f62e 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -30,7 +30,6 @@
 static void ngx_http_request_handler(ngx_event_t *ev);
 static ngx_int_t ngx_http_set_write_handler(ngx_http_request_t *r);
 static void ngx_http_writer(ngx_http_request_t *r);
-static ngx_int_t ngx_http_postponed_handler(ngx_http_request_t *r);
 
 static void ngx_http_block_read(ngx_http_request_t *r);
 static void ngx_http_read_discarded_body_handler(ngx_http_request_t *r);
@@ -404,6 +403,8 @@
     }
 
     c->single_connection = 1;
+    c->destroyed = 0;
+
     r->connection = c;
 
     r->main = r;
@@ -455,7 +456,7 @@
         return;
     }
 
-    n = recv(c->fd, buf, 1, MSG_PEEK);
+    n = recv(c->fd, (char *) buf, 1, MSG_PEEK);
 
     if (n == -1 && ngx_socket_errno == NGX_EAGAIN) {
         return;
@@ -1448,10 +1449,11 @@
         return;
     }
 
-    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http finalize request: %d, \"%V\"", rc, &r->uri);
+    ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                   "http finalize request: %d, \"%V?%V\"",
+                   rc, &r->uri, &r->args);
 
-    if (rc == NGX_ERROR || r->connection->closed) {
+    if (rc == NGX_ERROR || r->connection->error) {
         ngx_http_close_request(r, 0);
         return;
     }
@@ -1482,8 +1484,9 @@
     r->done = 1;
 
     if (r != r->connection->data) {
-        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http finalize non-active request: \"%V\"", &r->uri);
+        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                       "http finalize non-active request: \"%V?%V\"",
+                       &r->uri, &r->args);
         return;
     }
 
@@ -1491,8 +1494,8 @@
 
         pr = r->parent;
 
-        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http parent request: \"%V\"", &pr->uri);
+        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                       "http parent request: \"%V?%V\"", &pr->uri, &pr->args);
 
         if (rc != NGX_AGAIN) {
             pr->connection->data = pr;
@@ -1500,8 +1503,9 @@
 
         if (pr->postponed) {
 
-            ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                           "http request: \"%V\" has postponed", &pr->uri);
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http request: \"%V?%V\" has postponed",
+                           &pr->uri, &pr->args);
 
             if (rc != NGX_AGAIN && pr->postponed->request == r) {
                 pr->postponed = pr->postponed->next;
@@ -1511,13 +1515,14 @@
                 }
             }
 
-            ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                           "http request: \"%V\" still has postponed",
-                           &pr->uri);
+            ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                           "http request: \"%V?%V\" still has postponed",
+                           &pr->uri, &pr->args);
 
-            if (pr->done) {
-                ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                               "http wake parent request: \"%V\"", &pr->uri);
+            if (pr->done || pr->postponed->out) {
+                ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
+                               "http wake parent request: \"%V?%V\"",
+                               &pr->uri, &pr->args);
 
                 pr->write_event_handler(pr);
             }
@@ -1619,8 +1624,8 @@
     c = r->connection;
     wev = c->write;
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, wev->log, 0,
-                   "http writer handler: \"%V\"", &r->uri);
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, wev->log, 0,
+                   "http writer handler: \"%V?%V\"", &r->uri, &r->args);
 
     if (wev->timedout) {
         if (!wev->delayed) {
@@ -1661,21 +1666,15 @@
         }
     }
 
-    if (r->postponed) {
-        rc = ngx_http_postponed_handler(r);
+    rc = ngx_http_output_filter(r, NULL);
 
-        if (rc == NGX_DONE) {
-            /* the request pool may be already destroyed */
-            return;
-        }
-
-    } else {
-        rc = ngx_http_output_filter(r, NULL);
-
+    if (c->destroyed) {
+        return;
     }
 
-    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
-                   "http writer output filter: %d, \"%V\"", rc, &r->uri);
+    ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0,
+                   "http writer output filter: %d, \"%V?%V\"",
+                   rc, &r->uri, &r->args);
 
     if (rc == NGX_AGAIN) {
         clcf = ngx_http_get_module_loc_conf(r->main, ngx_http_core_module);
@@ -1690,67 +1689,13 @@
         return;
     }
 
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, wev->log, 0,
-                   "http writer done: \"%V\"", &r->uri);
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, wev->log, 0,
+                   "http writer done: \"%V?%V\"", &r->uri, &r->args);
 
     ngx_http_finalize_request(r, rc);
 }
 
 
-static ngx_int_t
-ngx_http_postponed_handler(ngx_http_request_t *r)
-{
-    ngx_int_t                      rc;
-    ngx_http_postponed_request_t  *pr;
-
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http postpone handler \"%V\"", &r->uri);
-
-    pr = r->postponed;
-
-    if (pr->request == NULL) {
-        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http postponed data \"%V\" %p", &r->uri, pr->out);
-
-        rc = ngx_http_output_filter(r, NULL);
-
-        if (rc == NGX_DONE) {
-            /* the request pool is already destroyed */
-            return NGX_DONE;
-        }
-
-        ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "http postponed output filter: %d", rc);
-
-        if (rc == NGX_ERROR) {
-            ngx_http_close_request(r, 0);
-            return NGX_DONE;
-        }
-
-        pr = r->postponed;
-
-        if (pr == NULL) {
-
-            if (rc == NGX_AGAIN) {
-                return NGX_AGAIN;
-            }
-
-            return NGX_OK;
-        }
-    }
-
-    r = pr->request;
-    r->connection->data = r;
-
-    ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http wake child request \"%V\"", &r->uri);
-
-    r->write_event_handler(r);
-
-    return NGX_DONE;
-}
-
-
 static void
 ngx_http_block_read(ngx_http_request_t *r)
 {
@@ -1862,7 +1807,7 @@
 
     if (n == NGX_ERROR) {
 
-        r->connection->closed = 1;
+        r->connection->error = 1;
 
         /*
          * if a client request body is discarded then we already set
@@ -2029,20 +1974,10 @@
 
     rev->handler = ngx_http_keepalive_handler;
 
-    if (wev->active) {
-        if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
-            if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT)
-                                                                  == NGX_ERROR)
-            {
-                ngx_http_close_connection(c);
-                return;
-            }
-
-        } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
-            if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
-                ngx_http_close_connection(c);
-                return;
-            }
+    if (wev->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) {
+        if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
+            ngx_http_close_connection(c);
+            return;
         }
     }
 
@@ -2224,20 +2159,10 @@
     wev = c->write;
     wev->handler = ngx_http_empty_handler;
 
-    if (wev->active) {
-        if (ngx_event_flags & NGX_USE_KQUEUE_EVENT) {
-            if (ngx_del_event(wev, NGX_WRITE_EVENT, NGX_DISABLE_EVENT)
-                                                                  == NGX_ERROR)
-            {
-                ngx_http_close_request(r, 0);
-                return;
-            }
-
-        } else if (ngx_event_flags & NGX_USE_LEVEL_EVENT) {
-            if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
-                ngx_http_close_request(r, 0);
-                return;
-            }
+    if (wev->active && (ngx_event_flags & NGX_USE_LEVEL_EVENT)) {
+        if (ngx_del_event(wev, NGX_WRITE_EVENT, 0) == NGX_ERROR) {
+            ngx_http_close_request(r, 0);
+            return;
         }
     }
 
@@ -2324,7 +2249,7 @@
 ngx_http_request_empty_handler(ngx_http_request_t *r)
 {
     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                   "http requets empty handler");
+                   "http request empty handler");
 
     return;
 }
@@ -2442,6 +2367,8 @@
 
     r->request_line.len = 0;
 
+    r->connection->destroyed = 1;
+
     ngx_destroy_pool(r->pool);
 }
 
@@ -2469,6 +2396,8 @@
     ngx_atomic_fetch_add(ngx_stat_active, -1);
 #endif
 
+    c->destroyed = 1;
+
     pool = c->pool;
 
     ngx_close_connection(c);
diff --git a/src/http/ngx_http_request_body.c b/src/http/ngx_http_request_body.c
index 779edf9..48aff74 100644
--- a/src/http/ngx_http_request_body.c
+++ b/src/http/ngx_http_request_body.c
@@ -230,7 +230,7 @@
         }
 
         if (n == 0 || n == NGX_ERROR) {
-            c->closed = 1;
+            c->error = 1;
             return NGX_HTTP_BAD_REQUEST;
         }
 
diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 37e979a..cfaca6e 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -234,7 +234,7 @@
 };
 
 
-static ngx_http_log_op_name_t ngx_http_upstream_log_fmt_ops[] = {
+static ngx_http_log_op_name_t  ngx_http_upstream_log_fmt_ops[] = {
     { ngx_string("upstream_status"), 0, NULL,
                                     ngx_http_upstream_log_status_getlen,
                                     ngx_http_upstream_log_status },
@@ -248,10 +248,10 @@
 static ngx_http_variable_t  ngx_http_upstream_vars[] = {
 
     { ngx_string("upstream_status"),
-      ngx_http_upstream_status_variable, 0, 0, 0 },
+      ngx_http_upstream_status_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
 
     { ngx_string("upstream_response_time"),
-      ngx_http_upstream_response_time_variable, 0, 0, 0 },
+      ngx_http_upstream_response_time_variable, 0, NGX_HTTP_VAR_NOHASH, 0 },
 
     { ngx_null_string, NULL, 0, 0, 0 }
 };
@@ -387,7 +387,7 @@
     c = r->connection;
     u = r->upstream;
 
-    if (c->closed) {
+    if (c->error) {
         ngx_http_upstream_finalize_request(r, u,
                                            NGX_HTTP_CLIENT_CLOSED_REQUEST);
         return;
@@ -406,7 +406,7 @@
         }
 
         ev->eof = 1;
-        c->closed = 1;
+        c->error = 1;
 
         if (ev->kq_errno) {
             ev->error = 1;
@@ -473,7 +473,7 @@
     }
 
     ev->eof = 1;
-    c->closed = 1;
+    c->error = 1;
 
     if (!u->cachable && u->peer.connection) {
         ngx_log_error(NGX_LOG_INFO, ev->log, err,
@@ -1125,12 +1125,14 @@
 static void
 ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
 {
+    int                             tcp_nodelay;
     ssize_t                         size;
     ngx_int_t                       rc;
     ngx_uint_t                      i, key;
     ngx_list_part_t                *part;
     ngx_table_elt_t                *h;
     ngx_event_pipe_t               *p;
+    ngx_connection_t               *c;
     ngx_pool_cleanup_t             *cl;
     ngx_pool_cleanup_file_t        *clf;
     ngx_http_core_loc_conf_t       *clcf;
@@ -1209,6 +1211,8 @@
         }
     }
 
+    c = r->connection;
+
     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
 
     if (u->pipe == NULL) {
@@ -1231,6 +1235,23 @@
             return;
         }
 
+        if (clcf->tcp_nodelay && c->tcp_nodelay == NGX_TCP_NODELAY_UNSET) {
+            ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0, "tcp_nodelay");
+
+            tcp_nodelay = 1;
+
+            if (setsockopt(c->fd, IPPROTO_TCP, TCP_NODELAY,
+                               (const void *) &tcp_nodelay, sizeof(int)) == -1)
+            {
+                ngx_connection_error(c, ngx_socket_errno,
+                                     "setsockopt(TCP_NODELAY) failed");
+                ngx_http_upstream_finalize_request(r, u, 0);
+                return;
+            }
+
+            c->tcp_nodelay = NGX_TCP_NODELAY_SET;
+        }
+
         size = u->buffer.last - u->buffer.pos;
 
         if (size) {
@@ -1241,7 +1262,7 @@
                 return;
             }
 
-            ngx_http_upstream_process_non_buffered_body(r->connection->write);
+            ngx_http_upstream_process_non_buffered_body(c->write);
 
         } else {
             u->buffer.pos = u->buffer.start;
@@ -1262,7 +1283,7 @@
 
     if (u->cache && u->cache->ctx.file.fd != NGX_INVALID_FILE) {
         if (ngx_close_file(u->cache->ctx.file.fd) == NGX_FILE_ERROR) {
-            ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
+            ngx_log_error(NGX_LOG_ALERT, c->log, ngx_errno,
                           ngx_close_file_n " \"%s\" failed",
                           u->cache->ctx.file.name.data);
         }
@@ -1292,9 +1313,9 @@
     p->bufs = u->conf->bufs;
     p->busy_size = u->conf->busy_buffers_size;
     p->upstream = u->peer.connection;
-    p->downstream = r->connection;
+    p->downstream = c;
     p->pool = r->pool;
-    p->log = r->connection->log;
+    p->log = c->log;
 
     p->cachable = u->cachable;
 
@@ -1305,7 +1326,7 @@
     }
 
     p->temp_file->file.fd = NGX_INVALID_FILE;
-    p->temp_file->file.log = r->connection->log;
+    p->temp_file->file.log = c->log;
     p->temp_file->path = u->conf->temp_path;
     p->temp_file->pool = r->pool;
 
@@ -1364,7 +1385,7 @@
          */
 
         p->cyclic_temp_file = 1;
-        r->connection->sendfile = 0;
+        c->sendfile = 0;
 
     } else {
         p->cyclic_temp_file = 0;
@@ -1394,8 +1415,9 @@
     size_t                     size;
     ssize_t                    n;
     ngx_buf_t                 *b;
+    ngx_int_t                  rc;
     ngx_uint_t                 do_write;
-    ngx_connection_t          *c;
+    ngx_connection_t          *c, *client;
     ngx_http_request_t        *r;
     ngx_http_upstream_t       *u;
     ngx_http_core_loc_conf_t  *clcf;
@@ -1426,6 +1448,7 @@
 
     r = c->data;
     u = r->upstream;
+    client = r->connection;
 
     b = &u->buffer;
 
@@ -1438,7 +1461,13 @@
         if (do_write) {
 
             if (u->out_bufs || u->busy_bufs) {
-                if (ngx_http_output_filter(r, u->out_bufs) == NGX_ERROR) {
+                rc = ngx_http_output_filter(r, u->out_bufs);
+
+                if (client->destroyed) {
+                    return;
+                }
+
+                if (rc == NGX_ERROR) {
                     ngx_http_upstream_finalize_request(r, u, 0);
                     return;
                 }
@@ -1490,18 +1519,20 @@
         break;
     }
 
-    if (ngx_handle_write_event(r->connection->write, clcf->send_lowat)
-        == NGX_ERROR)
-    {
-        ngx_http_upstream_finalize_request(r, u, 0);
-        return;
+    if (client->data == r) {
+        if (ngx_handle_write_event(client->write, clcf->send_lowat)
+            == NGX_ERROR)
+        {
+            ngx_http_upstream_finalize_request(r, u, 0);
+            return;
+        }
     }
 
-    if (r->connection->write->active) {
-        ngx_add_timer(r->connection->write, clcf->send_timeout);
+    if (client->write->active) {
+        ngx_add_timer(client->write, clcf->send_timeout);
 
-    } else if (r->connection->write->timer_set) {
-        ngx_del_timer(r->connection->write);
+    } else if (client->write->timer_set) {
+        ngx_del_timer(client->write);
     }
 
     if (ngx_handle_read_event(u->peer.connection->read, 0) == NGX_ERROR) {
@@ -1512,8 +1543,8 @@
     if (u->peer.connection->read->active) {
         ngx_add_timer(u->peer.connection->read, u->conf->read_timeout);
 
-    } else if (r->connection->read->timer_set) {
-        ngx_del_timer(r->connection->read);
+    } else if (u->peer.connection->read->timer_set) {
+        ngx_del_timer(u->peer.connection->read);
     }
 }
 
@@ -1577,13 +1608,14 @@
 ngx_http_upstream_process_body(ngx_event_t *ev)
 {
     ngx_event_pipe_t     *p;
-    ngx_connection_t     *c;
+    ngx_connection_t     *c, *downstream;
     ngx_http_request_t   *r;
     ngx_http_upstream_t  *u;
 
     c = ev->data;
     r = c->data;
     u = r->upstream;
+    downstream = r->connection;
 
     if (ev->write) {
         ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
@@ -1618,6 +1650,11 @@
                 }
 
                 if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
+
+                    if (downstream->destroyed) {
+                        return;
+                    }
+
                     ngx_http_upstream_finalize_request(r, u, 0);
                     return;
                 }
@@ -1648,6 +1685,11 @@
         }
 
         if (ngx_event_pipe(p, ev->write) == NGX_ABORT) {
+
+            if (downstream->destroyed) {
+                return;
+            }
+
             ngx_http_upstream_finalize_request(r, u, 0);
             return;
         }
@@ -1761,7 +1803,7 @@
         }
     }
 
-    if (r->connection->closed) {
+    if (r->connection->error) {
         ngx_http_upstream_finalize_request(r, u,
                                            NGX_HTTP_CLIENT_CLOSED_REQUEST);
         return;
diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index 3969d7e..6e831b5 100644
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -843,6 +843,13 @@
                    "http variables: %ui", cmcf->variables.nelts);
 
 
+    for (n = 0; n < cmcf->all_variables.nelts; n++) {
+        if (av[n].flags & NGX_HTTP_VAR_NOHASH) {
+            av[n].name.data = NULL;
+        }
+    }
+
+
     /* init the all http variables hash */
 
     cmcf->variables_hash.max_size = 500;
diff --git a/src/http/ngx_http_variables.h b/src/http/ngx_http_variables.h
index d1b23e8..480b4a5 100644
--- a/src/http/ngx_http_variables.h
+++ b/src/http/ngx_http_variables.h
@@ -35,6 +35,7 @@
 #define NGX_HTTP_VAR_CHANGABLE   1
 #define NGX_HTTP_VAR_NOCACHABLE  2
 #define NGX_HTTP_VAR_INDEXED     4
+#define NGX_HTTP_VAR_NOHASH      8
 
 
 struct ngx_http_variable_s {
diff --git a/src/http/ngx_http_write_filter_module.c b/src/http/ngx_http_write_filter_module.c
index f3b3622..c4d0a0e 100644
--- a/src/http/ngx_http_write_filter_module.c
+++ b/src/http/ngx_http_write_filter_module.c
@@ -55,7 +55,7 @@
 
     c = r->connection;
 
-    if (c->closed) {
+    if (c->error) {
         return NGX_ERROR;
     }
 
@@ -220,7 +220,7 @@
     }
 
     if (chain == NGX_CHAIN_ERROR) {
-        c->closed = 1;
+        c->error = 1;
         return NGX_ERROR;
     }