Mercurial > hg > nginx-quic
view src/mysql/ngx_http_mysql_test.c @ 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 | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_mysql.h> #include <ngx_http.h> typedef struct { ngx_addr_t *peers; ngx_uint_t npeers; } ngx_http_mysql_test_conf_t; static void ngx_http_mysql_auth(ngx_mysql_t *m); static void ngx_http_mysql_done(ngx_mysql_t *m); static void *ngx_http_mysql_test_create_loc_conf(ngx_conf_t *cf); static char *ngx_http_mysql_test(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static ngx_command_t ngx_http_mysql_test_commands[] = { { ngx_string("mysql_test"), NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, ngx_http_mysql_test, NGX_HTTP_LOC_CONF_OFFSET, 0, NULL }, ngx_null_command }; static ngx_http_module_t ngx_http_mysql_test_module_ctx = { NULL, /* preconfiguration */ NULL, /* postconfiguration */ NULL, /* create main configuration */ NULL, /* init main configuration */ NULL, /* create server configuration */ NULL, /* merge server configuration */ ngx_http_mysql_test_create_loc_conf, /* create location configuration */ NULL /* merge location configuration */ }; ngx_module_t ngx_http_mysql_test_module = { NGX_MODULE_V1, &ngx_http_mysql_test_module_ctx, /* module context */ ngx_http_mysql_test_commands, /* module directives */ NGX_HTTP_MODULE, /* module type */ NULL, /* init master */ NULL, /* init module */ NULL, /* init process */ NULL, /* init thread */ NULL, /* exit thread */ NULL, /* exit process */ NULL, /* exit master */ NGX_MODULE_V1_PADDING }; static ngx_str_t ngx_mysql_login = ngx_string("root"); static ngx_str_t ngx_mysql_passwd = ngx_string("tp"); static ngx_str_t ngx_mysql_database = ngx_string("mysql"); static ngx_str_t ngx_mysql_command_query = ngx_string("select * from user"); static ngx_int_t ngx_http_mysql_test_handler(ngx_http_request_t *r) { ngx_int_t rc; ngx_mysql_t *m; ngx_http_mysql_test_conf_t *mtcf; mtcf = ngx_http_get_module_loc_conf(r, ngx_http_mysql_test_module); m = ngx_pcalloc(r->pool, sizeof(ngx_mysql_t)); if (m == NULL) { return NGX_HTTP_INTERNAL_SERVER_ERROR; } m->pool = r->pool; m->handler = ngx_http_mysql_auth; m->data = r; m->login = &ngx_mysql_login; m->passwd = &ngx_mysql_passwd; m->database = &ngx_mysql_database; /* STUB */ m->peer.sockaddr = mtcf->peers[0].sockaddr; m->peer.socklen = mtcf->peers[0].socklen; m->peer.name = &mtcf->peers[0].name; m->peer.tries = mtcf->npeers; m->peer.get = ngx_event_get_peer; /**/ m->peer.log = r->connection->log; m->peer.log_error = NGX_ERROR_ERR; rc = ngx_mysql_connect(m); if (rc == NGX_OK || rc == NGX_AGAIN) { return NGX_DONE; } return NGX_HTTP_INTERNAL_SERVER_ERROR; } static void ngx_http_mysql_auth(ngx_mysql_t *m) { ngx_http_request_t *r; r = m->data; if (m->state != NGX_OK) { ngx_http_finalize_request(r, NGX_HTTP_NO_CONTENT); return; } m->query.len = NGX_MYSQL_CMDPKT_LEN + ngx_mysql_command_query.len; m->query.data = ngx_pnalloc(r->pool, m->query.len); if (m->query.data == NULL) { ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR); return; } ngx_memcpy(m->query.data + NGX_MYSQL_CMDPKT_LEN, ngx_mysql_command_query.data, ngx_mysql_command_query.len); m->handler = ngx_http_mysql_done; ngx_mysql_query(m); } static void ngx_http_mysql_done(ngx_mysql_t *m) { ngx_http_request_t *r; r = m->data; ngx_http_finalize_request(r, NGX_HTTP_NO_CONTENT); } static void * ngx_http_mysql_test_create_loc_conf(ngx_conf_t *cf) { ngx_http_mysql_test_conf_t *conf; conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_mysql_test_conf_t)); if (conf == NULL) { return NGX_CONF_ERROR; } return conf; } static char * ngx_http_mysql_test(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_http_mysql_test_conf_t *mtcf = conf; ngx_str_t *value; ngx_url_t u; ngx_http_core_loc_conf_t *clcf; clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module); clcf->handler = ngx_http_mysql_test_handler; value = cf->args->elts; ngx_memzero(&u, sizeof(ngx_url_t)); u.url = value[1]; u.default_port = 3306; if (ngx_parse_url(cf->pool, &u) != NGX_OK) { if (u.err) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%s in upstream \"%V\"", u.err, &u.url); } return NGX_CONF_ERROR; } mtcf->peers = u.addrs; mtcf->npeers = u.naddrs; return NGX_CONF_OK; }