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From Arunkumar Janarthanan <arunkumar.webad...@gmail.com>
Subject Re: [users@httpd] Apache Server status page shows uneven number of requests across load balanced web servers
Date Wed, 27 Jan 2010 20:50:49 GMT
Gary,

Here is the netstat output attached from one of the webserver where the
connections are on HIGH numbers. Regarding the load balancer I am trying to
explore more setting options.

Thanks again for looking into this issue.

Best Regards,
Arun J

On Wed, Jan 27, 2010 at 2:49 PM, Gary Smith <gary.smith@holdstead.com>wrote:

>  Arun,
>
>
>
> This is just a WAG, but I think that the problem still lies in the client
> side and how the load balancer is handling the requests.  I would still be
> interested in seeing the netstat -atunep output  from one of he affected
> machines when there is a high level of connections in a closed state.  Even
> though the sessions aren’t sticky, is it possible that the load balancer is
> handling keep alive in such a way that it’s sending the back to the original
> server but on in a new state?  (that’s a little beyond my knowledge
> though).
>
>
>
> Gary Smith
>
>
>
> *From:* Arunkumar Janarthanan [mailto:arunkumar.webadmin@gmail.com]
> *Sent:* Wednesday, January 27, 2010 11:37 AM
>
> *To:* users@httpd.apache.org
> *Subject:* Re: [users@httpd] Apache Server status page shows uneven number
> of requests across load balanced web servers
>
>
>
> Thanks Gary,
>
> The load balancing method we use is weight based, so apparently the load
> balancer suppose to send the traffic to the web server has least number of
> connections. However the Netscaler support confirmed they see eventual
> number of traffic routed to all 4 web servers.
>
> Regarding the Apache restart time, I restarted all 4 servers same time and
> checked could still see the requests on 1 & 3 are being handled.  I dont
> think we have sticky session enabled at loadbalancer level.
>
> For the same problem we have not before changed the load balancer settings
> from sourceIP persistence to Weight based to have the load distributed equal
> on all the servers.
>
>                           IP     port         Type        State    Req/s
>
> 731-...30_80  x.x.x.x   80         HTTP           UP     16/s
>
> 731-...31_80  x.x.x.x   80         HTTP           UP     16/s
>
> 731-...31_80  x.x.x.x   80         HTTP           UP     14/s
>
> 731-...55_80  x.x.x.x   80         HTTP           UP     20/s
>
>
>
>                Rsp/s   Reqb/s   Rspb/s ClntConn  SvrConn  MaxConn   SurgeQ
>
> 731-...30_80    16/s  12406/s 345117/s        7      285        0        0
>
> 731-...31_80    16/s  10956/s 365025/s        7      262        0        0
>
> 731-...31_80    14/s  11140/s 368655/s        6      268        0        0
>
> 731-...55_80    20/s  14322/s 420105/s        7      272        0        0
>
>
>
>
>
> However the Apache server status still shows the number of requests being
> handled huge difference.
>
>
>
> I have attached the balancer-manager page as well with this email.
>
>
>
> Best Regards,
>
> Arun J
>
>
>
>

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