Re: [cobalt-security] kernel: VM: do_try_to_free_pages failed for ... ?

["Lawrence Frewin of Accommodation.com" <Lawrence@xxxxxxxxxxxxxxxxx>]

I had this problem regularly a few weeks ago, I noticed that it often
happened when we were being spidered by 4 or more search engines at the same
time as swatch (active monitor) running.

The RAQ affected had about 220 virtual sites on it, mostly parked domains
with DNS records, holding pages and doorway pages, but no conventional
"heavy traffic" sites.

It seems that the RAQ was just overloaded and ran out of memory trying to
serve the various pages up and run all of the various other functions. I
think "do_try_to_free_pages" is just the RAQ trying to fix itself once it
has gone down.

We found that by removing about 5000 of the various  pages that were being
spidered and transferring about 30 virtual sites off the machine it stopped
the machine crashing as you describe.

This won't be the cure all machines with this problem, but it may be a good
place to start looking if your machine holds lots of content.

Lawrence


----- Original Message -----
From: "Michael Stauber" <cobalt@xxxxxxxxxxxxxx>
To: <cobalt-security@xxxxxxxxxxxxxxx>
Sent: Friday, June 22, 2001 11:13 AM
Subject: [cobalt-security] kernel: VM: do_try_to_free_pages failed for ... ?


> Hi all,
>
> for the second time in a week my RaQ3 stopped responding to anything but
> basic ICMP (ping and traceroute). After a cold reboot I checked the
logfiles
> in both cases and noted the following discrepancy:
>
>
> 1st outage:
>
> Jun 17 15:21:55 admin kernel: VM: do_try_to_free_pages failed for
mysqld...
>
> 2nd outage:
>
> Jun 22 09:14:23 admin kernel: VM: do_try_to_free_pages failed for
> emumail.cgi...
>
>
> Any ideas what this "do_try_to_free_pages" error is about and how to
prevent
> it?
>
>
> --
>
> Mit freundlichen Grüßen / Best regards
>
> Michael Stauber
>
> Stauber Multimedia Design ____ Phone: +49-6471-923812
> Hauptstrasse 31 ______ D-56244 Goddert ______ Germany
> SMD.NET ___ SOLARSPEED.NET ___ FORUMWORLD.COM
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