[Mongrel] Apache mod_proxy_balancer hang on high traffic hour

William Tribley bill at tribley.org
Thu Sep 13 18:45:41 EDT 2007


Have you run system profilers to see where the bottlenecks are? You 
can do this when the system is moderately loaded, it will give you an 
idea what problem will hit when the load goes up.

At 11:50 AM 9/13/2007, you wrote:
>more info
>
>just 1 server
>
>webserver + appserver + dbserver
>
>On 9/14/07, Yan Meng 
><<mailto:dreamwords at gmail.com>dreamwords at gmail.com > wrote:
>Hi, Guys
>
>Our team is running a web2.0 finance site in China
>
><http://www.caibangzi.com/>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/>http://www.caibangzi.com/
>
>
>
>
>--
>Best Regards,
>
>-Yan Meng
><http://www.caibangzi.com/>http://www.caibangzi.com/
>_______________________________________________
>Mongrel-users mailing list
>Mongrel-users at rubyforge.org
>http://rubyforge.org/mailman/listinfo/mongrel-users

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