Memory usage with aio

[Андрей Василишин <a.vasilishin@xxxxxx>]

Всем привет!

Заметил, что после включения aio нгинкс стал больше потреблять памяти 
при тех же нагрузках.
Нгикс до аио:
nginx -V
nginx version: nginx/0.8.53
TLS SNI support enabled
configure arguments: --conf-path=/etc/nginx/nginx.conf 
--error-log-path=/var/log/nginx/error.log 
--http-client-body-temp-path=/var/lib/nginx/body 
--http-fastcgi-temp-path=/var/lib/nginx/fastcgi 
--http-log-path=/var/log/nginx/access.log 
--http-proxy-temp-path=/var/lib/nginx/proxy 
--http-scgi-temp-path=/var/lib/nginx/scgi 
--http-uwsgi-temp-path=/var/lib/nginx/uwsgi 
--lock-path=/var/lock/nginx.lock --pid-path=/var/run/nginx.pid 
--with-debug --with-http_dav_module --with-http_flv_module 
--with-http_geoip_module --with-http_gzip_static_module 
--with-http_image_filter_module --with-http_realip_module 
--with-http_stub_status_module --with-http_ssl_module 
--with-http_sub_module --with-http_xslt_module --with-ipv6 
--with-sha1=/usr/include/openssl --with-md5=/usr/include/openssl 
--with-mail --with-mail_ssl_module 
--add-module=/tmp/buildd/nginx-0.8.53/modules/nginx-upstream-fair 
--add-module=/tmp/buildd/nginx-0.8.53/modules/nginx-echo
        location /flv {
                 root   /var/www/;
                 try_files  /XXXXX$uri
                            /YYYYY$uri

                            =404;
                 internal;
                 flv;
                 output_buffers  1 1m;
#                 aio on;
#                 directio  4m;
#                 set $limit_rate        256k;

         }

Нгинкс с аио:

# nginx -V
nginx version: nginx/0.8.54
TLS SNI support enabled
configure arguments: --conf-path=/etc/nginx/nginx.conf 
--error-log-path=/var/log/nginx/error.log 
--http-client-body-temp-path=/var/lib/nginx/body 
--http-fastcgi-temp-path=/var/lib/nginx/fastcgi 
--http-log-path=/var/log/nginx/access.log 
--http-proxy-temp-path=/var/lib/nginx/proxy 
--http-scgi-temp-path=/var/lib/nginx/scgi 
--http-uwsgi-temp-path=/var/lib/nginx/uwsgi 
--lock-path=/var/lock/nginx.lock --pid-path=/var/run/nginx.pid 
--with-debug --with-file-aio --with-http_addition_module 
--with-http_dav_module --with-http_flv_module --with-http_geoip_module 
--with-http_gzip_static_module --with-http_image_filter_module 
--with-http_perl_module --with-http_random_index_module 
--with-http_realip_module --with-http_secure_link_module 
--with-http_stub_status_module --with-http_ssl_module 
--with-http_sub_module --with-http_xslt_module --with-ipv6 
--with-sha1=/usr/include/openssl --with-md5=/usr/include/openssl 
--with-mail --with-mail_ssl_module 
--add-module=/build/buildd/nginx-0.8.54/debian/modules/nginx-development-kit 
--add-module=/build/buildd/nginx-0.8.54/debian/modules/nginx-upstream-fair 
--add-module=/build/buildd/nginx-0.8.54/debian/modules/nginx-echo 
--add-module=/build/buildd/nginx-0.8.54/debian/modules/nginx-lua 
--add-module=/build/buildd/nginx-0.8.54/debian/modules/nginx-push-0.692
        location /flv {
                 root   /var/www/;
                 try_files  /XXXXX$uri
                            /YYYYY$uri

                            =404;
                 internal;
                 flv;
                 output_buffers  1 1m;
                 aio on;
                 directio  4m;
#                 set $limit_rate        256k;

         }


В конфиге по сути добавилось 2 строчки:
                 aio on;
                 directio  4m;

Модулей кроме flv и proxy в конфиге никаких
больше не использую.
 По графикам видно, после пробела, когда было включено аио при тех же 
нагрузках стало больше потребляться памяти, почему?
--
WBR, Andrey Vasilishin CDIG1-UANIC, CDIG1-RIPE

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