nginx VS apache: Количество одновременных TCP соединений

Igor Sysoev is at rambler-co.ru
Tue Aug 22 20:12:34 MSD 2006 

On Tue, 22 Aug 2006, Lex Lyamin wrote:

> Столкнулся со следующей ситуацией:
>
>
>
> Есть некая  html страничка,  достаточно богатая обьектами Content-Type:
> image/jpeg.
> Есть два сервера отдающих эту страничку и эти  image/jpeg.
>
> Apache case:
>
> Summary,Group,Protocol,Count
> Sequence,HTTP,HTTP/1.1 200 OK\r\n,40
> Sequence,TCP,Connection establish request (SYN): 29471 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29471,1
> Sequence,HTTP,GET /register.php HTTP/1.1\r\n,1
> Sequence,HTTP,GET /style/face.css HTTP/1.1\r\n,1
> Sequence,HTTP,GET /js/common.js HTTP/1.1\r\n,1
> Sequence,HTTP,GET /js/ac_runactivecontent.js HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_introimg- l-brd.jpg HTTP/1.1\r\n,1
> Sequence,TCP,Connection establish request (SYN): 29472 -> http,1
> Sequence,TCP,Connection establish request (SYN): 29473 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29472,1
> Sequence,HTTP,GET /images/tbl-reg_uzor-left-top.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_uzor-left-bottom.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29473,1
> Sequence,HTTP,GET /counter?id=1097265;t=55;js=13
> ;r=;j=true;s=1280*768;d=32;rand=0.10840907616180973 HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): 29471 -> http,1
> Sequence,TCP,Connection finish (FIN): http -> 29471,1
> Sequence,TCP,Connection establish request (SYN): 29474 -> http,1
> Sequence,HTTP,GET /images/users-arrow.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): http -> 29473,1
> Sequence,TCP,Connection finish (FIN): 29473 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29474,1
> Sequence,HTTP,GET /images/tbl-reg_menu-top.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu-top-right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/users- arrow-org.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-active-r.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_info-top.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_reg-1.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): http -> 29472,1
> Sequence,TCP,Connection finish (FIN): 29472 -> http,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-top-right.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection establish request (SYN): 29475 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29475,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-top-left.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_btn-step2.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-bottom-left.gifHTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-bottom-right.gifHTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu-bottom-right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-sep-l.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-sep-r.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): 29474 -> http,1
> Sequence,TCP,Connection finish (FIN): http -> 29474,1
> Sequence,TCP,Connection establish request (SYN): 29476 -> http,1
> Sequence,HTTP,GET /images/tbl-mn_uzor-right-top.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29476,1
> Sequence,HTTP,GET /images/tbl-reg_introimg-r-brd.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_uzor-right-bottom.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_brd-left2.jpg HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): 29475 -> http,1
> Sequence,TCP,Connection finish (FIN): http -> 29475,1
> Sequence,TCP,Connection establish request (SYN): 29477 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29477,1
> Sequence,HTTP,GET /images/tbl-mn_bg.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu-bg.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-active-l.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-active-c.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu- bottom.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-top.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_info-bg.jpg HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): http -> 29476,1
> Sequence,TCP,Connection finish (FIN): 29476 -> http,1
> Sequence,TCP,Connection establish request (SYN): 29478 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29478,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-left.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-bg.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-usi_bg-light.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_brd- right2.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-bottom.gif HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): 29477 -> http,1
> Sequence,TCP,Connection finish (FIN): http -> 29477,1
>
> Итого 8 одновременных tcp соединений.
> Общее время загрузки страницы - 0.765 sec.
>
>
> NGINX case:
>
> Summary,Group,Protocol,Count
> Sequence,HTTP,HTTP/1.1 200 OK\r\n,40
> Sequence,TCP,Connection establish request (SYN): 29536 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29536,1
> Sequence,HTTP,GET /register.php HTTP/1.1\r\n,1
> Sequence,HTTP,GET /style/face.css HTTP/1.1\r\n,1
> Sequence,HTTP,GET /js/common.js HTTP/1.1\r\n,1
> Sequence,HTTP,GET /js/ac_runactivecontent.js HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_introimg-l-brd.jpg HTTP/1.1\r\n,1
> Sequence,TCP,Connection establish request (SYN): 29537 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29537,1
> Sequence,TCP,Connection establish request (SYN): 29538 -> http,1
> Sequence,TCP,Connection establish acknowledge (SYN+ACK): http -> 29538,1
> Sequence,HTTP,GET /images/tbl-mn_uzor-left-bottom.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_uzor-left-top.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET
> /counter?id=1097265;t=55;js=13;r=;j=true;s=1280*768;d=32;rand=
> 0.213420547460749 HTTP/1.1\r\n,1
> Sequence,TCP,Connection finish (FIN): http -> 29538,1
> Sequence,TCP,Connection finish (FIN): 29538 -> http,1
> Sequence,HTTP,GET /images/tbl-reg_menu-top.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/users-arrow.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu- top-right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/users-arrow-org.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-active-r.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_info-top.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_reg-1.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-top-left.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-top-right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_btn-step2.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-bottom-left.gifHTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-corner-bottom-right.gifHTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu-bottom-right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-sep-l.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-sep-r.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_introimg- r-brd.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_uzor-right-top.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_uzor-right-bottom.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_brd-left2.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_bg.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu-bg.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news-active-l.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_news- active-c.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_menu-bottom.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_info-bg.jpg HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-top.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-left.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-bg.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-usi_bg-light.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl- right.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-reg_intbl-bottom.gif HTTP/1.1\r\n,1
> Sequence,HTTP,GET /images/tbl-mn_brd-right2.jpg HTTP/1.1\r\n,1
>
> Итого 3 одновременных tcp соединения.
> Общее время загрузки страницы - 1.912 sec.
>
>
> Нужно заметить что время получения одного обьекта с апача и с nginx
> приблизительно  относительно одинаковы.
> Разница может составлять 0,005 секунды как в ту так и в другую стороны,  что
> вполне можно списать на погрешность изменрений.
>
> Отсюда вопрос:
>    - кто и исходя из каких данных принимает решение сколько одновременных
> tcp cоединений к серверу хочется открывать ?

Решение принимает браузер (какой, кстати ?).
Нужно смотреть возвращаемые заголовки Апача, как минимум.
Для nginx'а я более или мнее представляю, что он может вернуть.


Игорь Сысоев
http://sysoev.ru

More information about the nginx-ru mailing list