RE: [WEB400] performance of cgi-interactive programs

[Scott Mildenberger <Smildenber@xxxxxxxxxxxx>]

You might want to experiment with this sometime, especially the persist
timeout and maybe starting more threads.  May help, may not.

Scott

> -----Original Message-----
> From: Nathan M. Andelin [mailto:nandelin@relational-data.com]
> Sent: Friday, January 25, 2002 11:49 AM
> To: web400@midrange.com
> Subject: Re: [WEB400] performance of cgi-interactive programs
>
>
> From: "Mark A. Manske" <mmanske@minter-weisman.com>
> > In response to a few questions everyone has about our
> > "set-up" here...
>
> Mark,
>
> On my little 170-2290 (73 CPW), I activate 40 HTTP Server
> threads.  I also
> use the "Keep-Alive" header in connection with the following
> configuration
> directives:
>
> PersistTimeout 2 minutes
> MaxPersistRequest 40
>
> It improves network performance.  The default behavior is for the HTTP
> server to drop the connection after serving a page.  You
> might try something
> similar to test performance.  Your pages reference quite a
> few small image
> files.  The pages also provide links to PDF files.  Serving
> them with only 5
> active HTTP server threads and dropping the connection after
> each request
> may impact your users significantly.
>
> Performance tuning with CGI can be a balancing act.  An
> active connection
> puts a lock on one of the HTTP server threads.  To support 40
> concurrent
> users, you probably need at least 40 HTTP Server threads.
> However, that may
> lead to 40 active BCI jobs.  Each one of those jobs could
> activate your 40
> CGI programs.  That could lead to 1600 CGI activations if the
> CGI programs
> run under a named activation group.  1600 active CGI
> instances may put a
> burden on OS/400 memory management.  It's a balancing act.
> It sounds like
> you may have plenty of memory.
>
> Good luck,
>
> Nathan M. Andelin
> www.relational-data.com
>
>
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