# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1406557819 -14400
# Node ID d1bde5c3c5d21368de04a59506a06c1174353a19
# Parent  294d020bbcfec2fcddbe35f3a76610ebd6084d7a
Bigger iovec buffer in ngx_readv_chain().

This helps to reduce likelyhood of memory allocations in ngx_readv_chain(),
which are known to lead to noticeable effects in some cases, see
http://mailman.nginx.org/pipermail/nginx/2014-July/044512.html.

diff --git a/src/os/unix/ngx_readv_chain.c b/src/os/unix/ngx_readv_chain.c
--- a/src/os/unix/ngx_readv_chain.c
+++ b/src/os/unix/ngx_readv_chain.c
@@ -10,7 +10,11 @@
 #include <ngx_event.h>
 
 
-#define NGX_IOVS  16
+#if (IOV_MAX > 64)
+#define NGX_IOVS  64
+#else
+#define NGX_IOVS  IOV_MAX
+#endif
 
 
 #if (NGX_HAVE_KQUEUE)