Re: [cobalt-developers] handling extreme load

["Sherwin Ang" <sherwin@xxxxxxxxxx>]

We had the same problem, now the problem becomes scalability, maybe we
should get an XTR to handle the load, one of our application runs on
Interbase and it's eating all the CPU power of the Raq4 with 512MB ram.


Thanks,

Sherwin Ang
Web Programmer / Systems Administrator
Alchemy Solutions
http://www.alchemy.com.ph
Creative. Technology.

Tridel Technologies, Inc.
7th Floor Hanston Building
Emerald Ave., Ortigas Center
Pasig City

Tel: (632) 634-5141/ (632) 634-5140 Local 1040
Fax: (632) 634-5139

----- Original Message -----
From: "Matthew Nuzum" <cobalt@xxxxxxxxxxxxx>
To: "Cobalt Dev" <cobalt-developers@xxxxxxxxxxxxxxx>
Sent: Tuesday, February 05, 2002 11:58 AM
Subject: [cobalt-developers] handling extreme load


> I was just appraised that a customer is making a presentation of a new
> application.  They expect the presentation will yield about 3000
> simultaneous users into the website directly after.
>
> I'm a little concerned about my server's ability to handle this load.
>
> I have to say that I'm a little skeptical that there will be this high
> of a turnout, but at the same time, whenever you say something like
> that, Murphy's law is more often right than wrong.
>
> I have a Raq4i with 256MB of Ram.  I run MySQL set to "medium" mode,
> meaning I used the my-medium.cnf default config file which is optimized
> for systems willing to dedicate about 64MB of RAM to the db.  I use the
> MySQL databases for many of the sites on this server.
>
> Unfortunately, this customer's application uses PostgreSQL, so I
> upgraded the Postgres to 7.1.2 a while back.  I set the connections to
> 45, but I use all persistent connections.
>
> I do not use ASP on this server, therefore I've turned it off.  However,
> it still runs in the background.  Whenever I turn it off, the cobalt
> cron job turns it back on within 45 minutes.  ps aux shows:
> /home/chiliasp/asp-apache-3000/caspd
> running a number of times.  I'd like to make this stop running.
>
> I have set the max clients in the httpd.conf file to 50.  I found that
> the typical httpd child process uses about 12-14 MB of Ram, of which 9.5
> is shared.  Therefore taking the remaining 4.5 MB of RAM, multiplying
> that by 50 children process yields an alarming 225 MB of RAM usage.
> (can you believe the server shipped with a default of 300?)
>
> Can anyone make a suggestion on what I can do to help the server hold up
> to this load?  Any advise is appreciated.
>
> Matt
>
>
>
>
>
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