Mercurial > hg > nginx-quic
view src/core/ngx_config.h @ 6250:0256738454dc
Increased the default number of output buffers.
Since an output buffer can only be used for either reading or sending, small
amounts of data left from the previous operation (due to some limits) must be
sent before nginx will be able to read further into the buffer. Using only
one output buffer can result in suboptimal behavior that manifests itself in
forming and sending too small chunks of data. This is particularly painful
with SPDY (or HTTP/2) where each such chunk needs to be prefixed with some
header.
The default flow-control window in HTTP/2 is 64k minus one bytes. With one
32k output buffer this results is one byte left after exhausting the window.
With two 32k buffers the data will be read into the second free buffer before
sending, thus the minimum output is increased to 32k + 1 bytes which is much
better.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Tue, 15 Sep 2015 17:49:15 +0300 |
parents | b92d5a26d55f |
children | 5805301f990f |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_CONFIG_H_INCLUDED_ #define _NGX_CONFIG_H_INCLUDED_ #include <ngx_auto_headers.h> #if defined __DragonFly__ && !defined __FreeBSD__ #define __FreeBSD__ 4 #define __FreeBSD_version 480101 #endif #if (NGX_FREEBSD) #include <ngx_freebsd_config.h> #elif (NGX_LINUX) #include <ngx_linux_config.h> #elif (NGX_SOLARIS) #include <ngx_solaris_config.h> #elif (NGX_DARWIN) #include <ngx_darwin_config.h> #elif (NGX_WIN32) #include <ngx_win32_config.h> #else /* POSIX */ #include <ngx_posix_config.h> #endif #ifndef NGX_HAVE_SO_SNDLOWAT #define NGX_HAVE_SO_SNDLOWAT 1 #endif #if !(NGX_WIN32) #define ngx_signal_helper(n) SIG##n #define ngx_signal_value(n) ngx_signal_helper(n) #define ngx_random random /* TODO: #ifndef */ #define NGX_SHUTDOWN_SIGNAL QUIT #define NGX_TERMINATE_SIGNAL TERM #define NGX_NOACCEPT_SIGNAL WINCH #define NGX_RECONFIGURE_SIGNAL HUP #if (NGX_LINUXTHREADS) #define NGX_REOPEN_SIGNAL INFO #define NGX_CHANGEBIN_SIGNAL XCPU #else #define NGX_REOPEN_SIGNAL USR1 #define NGX_CHANGEBIN_SIGNAL USR2 #endif #define ngx_cdecl #define ngx_libc_cdecl #endif typedef intptr_t ngx_int_t; typedef uintptr_t ngx_uint_t; typedef intptr_t ngx_flag_t; #define NGX_INT32_LEN (sizeof("-2147483648") - 1) #define NGX_INT64_LEN (sizeof("-9223372036854775808") - 1) #if (NGX_PTR_SIZE == 4) #define NGX_INT_T_LEN NGX_INT32_LEN #define NGX_MAX_INT_T_VALUE 2147483647 #else #define NGX_INT_T_LEN NGX_INT64_LEN #define NGX_MAX_INT_T_VALUE 9223372036854775807 #endif #ifndef NGX_ALIGNMENT #define NGX_ALIGNMENT sizeof(unsigned long) /* platform word */ #endif #define ngx_align(d, a) (((d) + (a - 1)) & ~(a - 1)) #define ngx_align_ptr(p, a) \ (u_char *) (((uintptr_t) (p) + ((uintptr_t) a - 1)) & ~((uintptr_t) a - 1)) #define ngx_abort abort /* TODO: platform specific: array[NGX_INVALID_ARRAY_INDEX] must cause SIGSEGV */ #define NGX_INVALID_ARRAY_INDEX 0x80000000 /* TODO: auto_conf: ngx_inline inline __inline __inline__ */ #ifndef ngx_inline #define ngx_inline inline #endif #ifndef INADDR_NONE /* Solaris */ #define INADDR_NONE ((unsigned int) -1) #endif #ifdef MAXHOSTNAMELEN #define NGX_MAXHOSTNAMELEN MAXHOSTNAMELEN #else #define NGX_MAXHOSTNAMELEN 256 #endif #if ((__GNU__ == 2) && (__GNUC_MINOR__ < 8)) #define NGX_MAX_UINT32_VALUE (uint32_t) 0xffffffffLL #else #define NGX_MAX_UINT32_VALUE (uint32_t) 0xffffffff #endif #define NGX_MAX_INT32_VALUE (uint32_t) 0x7fffffff #endif /* _NGX_CONFIG_H_INCLUDED_ */