[Zope] Putting Zope into a tailspin can kill a whole Linux Server

[Chris McDonough]

You can also try the ForensicLogger product.

----- Original Message -----
From: "Oliver Bleutgen" <myzope@gmx.net>
To: <zope@zope.org>
Sent: Friday, November 02, 2001 12:30 PM
Subject: Re: [Zope] Putting Zope into a tailspin can kill a whole
Linux Server


> BZ wrote:
>
>  > This is the second time I have done this and I just thought the
list
>  >  should know.
>  >
>  > Once in awhile (every six months or so) I send Zope a request
that
>  > it just cannot handle. At that point (after waiting for a good
five
>  >  minutes) I  cancel the request by stopping the browser. This has
>  > twice resulted in Zope spinning out of control (taking up more
and
>  > more CPU) untill it kills  the entire server box.
>  >
>  > How does it kill a Linux box you say?
>  >
>  > Well, it kills off Apache, kills off SSH (no more remote access),
>  > kills off FTP. They all just become unresponsive.
>  >
>  > Here are the two times it has happened:
>  >
>  > - Zope 2.3.2, on RH Linux 7.0 384 MB Ram, 650 MHz Pentium: I
tried
>  > packing the database, stopped it and tried repacking it.
>  >
>  > - Zope 2.4.2 (same hardware): I tried creating a VERY LARGE Poll
>  > graph (10,000) and stopped it while it got going.
>  >
>  > I don't know if this is a bug or whatever, but it could be a
>  > problem. Zope can certainly be sent into a tailspin.
>
>
> I am by no means an kernel expert (for whatever os), but it might be
> interesting to find out what exactly causes your box stalling. Are
you
> sure that you aren't going OOM (out of memory) instead of
"overloading"
> the cpu? What I mean is that the unresponsivenes(sp?) of your system
> might be caused by something other than zope's cpu-usage, i.e
excessive
> memory usage.
> If you can repeat this, it might be worth using top/and or vmstat
> to watch what happens while zope goes to no man's land.
>
> cheers,
> oliver
>
>
>
>
>
>
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