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upstream timed out

Dmitry Y. Labutin
October 15, 2012 03:02AM
Доброго времени суток.

Frontend nginx стоит в Москве. Backend nginx стоит в Нижнем Новгороде.
Между ними по traceroute 10 хостов. На Frontend в error лог наблюдает
вот такая картина.

2012/10/15 10:33:31 [error] 5438#0: *67542270 upstream timed out (110:
Connection timed out) while connecting to upstream
2012/10/15 10:34:42 [error] 5436#0: *67548075 upstream timed out (110:
Connection timed out) while connecting to upstream
2012/10/15 10:34:44 [error] 5437#0: *67544442 upstream timed out (110:
Connection timed out) while connecting to upstream
2012/10/15 10:34:44 [error] 5436#0: *67548077 upstream timed out (110:
Connection timed out) while connecting to upstream
2012/10/15 10:34:44 [error] 5437#0: *67548502 upstream timed out (110:
Connection timed out) while connecting to upstream
2012/10/15 10:34:45 [error] 5437#0: *67546503 upstream timed out (110:
Connection timed out) while connecting to upstream
2012/10/15 10:34:46 [error] 5437#0: *67546508 upstream timed out (110:
Connection timed out) while connecting to upstream

По статистике (делаю срезы раз в 10 минут) имеем в зависимости от
количества посещение от 1 до 20 подобных ошибок за 10 минут.
При этом активность - это порядка 30-50 запросов в секунду.
Возьмем среднее. 10 ошибок в 10 минут и 40 запросов в секунду.
Получаем примерно 0.04% проблемных ситуаций. Замечу, что статистика
пингов между хостами ВСЕГДА показывала около 1.5% потерь (ping timeout),
а сообщения в логах nginx на frontend появилась только в середине
прошлой недели.
Может быть подскажите, в какую сторону копать?

Дмитрий Лабутин

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Subject Author Posted

upstream timed out

Dmitry Y. Labutin October 15, 2012 03:02AM

Re: upstream timed out

Andrey Kopeyko October 15, 2012 03:12AM

Re: upstream timed out

Dmitry Y. Labutin October 15, 2012 04:14AM

Re: upstream timed out

Andrey Kopeyko October 15, 2012 06:48AM

Re: upstream timed out

kav October 15, 2012 07:00AM

Re: upstream timed out

Maxim Dounin October 15, 2012 10:10AM

Re: upstream timed out

kav October 15, 2012 10:20AM

Re: upstream timed out

Илья Шипицин October 18, 2012 01:12AM

Re: upstream timed out

Dmitry Y. Labutin October 18, 2012 01:26AM

Re: upstream timed out

Alex Vorona October 18, 2012 01:44AM

Re: upstream timed out

Dmitry Y. Labutin October 18, 2012 02:04AM

Re: upstream timed out

Илья Шипицин October 18, 2012 04:12AM



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