[Mongrel] Apache mod_proxy_balancer hang on high traffic hour

Yan Meng dreamwords at gmail.com
Thu Sep 13 12:50:03 EDT 2007


more info

just 1 server

webserver + appserver + dbserver

On 9/14/07, Yan Meng <dreamwords at gmail.com> wrote:
>
> Hi, Guys
>
> Our team is running a web2.0 finance site in China
>
> http://www.caibangzi.com/
>
> We use APACHE + mod_proxy_balancer + mongrel to deploy our application, it
> workd super in the past few monthes.
>
> However, just  from last week, at high traffic hour (about 40,000 request
> per hour), our site is very very slow, it usually took more than 10 seconds
> to get a page or simply return timeout error.
>
> I telnet to the server and found that when I visit directly to one mongrel
> instance, it can return shortly, however when I visit from apache interface,
> it hang.
>
> I also cannot visit (timeout) the mod_proxy_balancer's frontend to see the
> balance-manager.
>
> However, the server load is just normal :(
>
> We guess maybe the reason is slow action block mongrel, is it the reason?
> Have any of you experienced of this?
>
> Any comments are appreciated.
>
> Our Server:
>
> Dual-Core AMD Opteron(tm) Processor 2214 HE * 2
> 4G RAM
> 20 mongrel instances
> mysql
>
> --
> Best Regards,
>
> -Yan Meng
> http://www.caibangzi.com/




-- 
Best Regards,

-Yan Meng
http://www.caibangzi.com/
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