Chuck,
We are handling around 100 requests per second spread over 5-10
application instances. We do have KeepAlive enabled in Apache. How would I
manage that in WO? If the application thread count grows to 300 threads or so,
does it mean that at one time we had a back log of ~250 requests or so?
Michael Kondratov
Aspire Auctions, Inc.
216-231-5515
> On Sep 13, 2016, at 6:40 PM, Chuck Hill <[email protected]> wrote:
>
> There is no easy answer.
>
> Ignoring Keep-Alive, you need to manage this setting, the Listen Queue Size,
> and number of instances to ensure that your app instances don’t build up a
> backlog of requests that will take longer to process than your users are
> willing to wait. Otherwise, your instances are going to be calculating
> responses that are just going to encounter a broken pipe when attempting to
> respond to the client. That is useless processing. 256 is way, way too high
> unless you are processing a lot of very short, quick responses. Relating
> this to the number of Apache processes is pretty meaningless. Apache is not
> doing much relative to your app.
>
> Request with Keep-Alive complicate this significantly as they tie up a worker
> thread until the connection is closed.
>
>
> Chuck
>
> From: <[email protected]> on behalf
> of Michael Kondratov <[email protected]>
> Date: Tuesday, September 13, 2016 at 3:33 PM
> To: WebObjects-Dev Mailing List List <[email protected]>
> Subject: WOWorkerThreadCountMax
>
> Hello,
> Does it make sense to set the value equal to or greater than the number
> of active apache processes? Our server is receiving more traffic than usual
> and each application is hitting the default limit of 256. I assume it is due
> to each apache process trying to maintain a connection to each instance. We
> typically see apache grow to 1000 processes.
>
>
> Michael Kondratov
> Aspire Auctions, Inc.
> 216-231-5515
>
>
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