Mailing List Archive: 1.02 children die under high load

1.02 children die under high load

Jan 31, 2007, 10:24 PM

Post #1 of 4 (651 views)

Hi,

Just stumbled across Varnish from a link on WikiPedia. I found someone
who had built a Debian Sarge compatible package as I did not have much
luck compiling it from source.

I can get Varnish to run and forward requests to the backend server and
serve up those requests, however the process seems to reset itself under
load. When I run varnishstat the counter gets to about 10 seconds, then
it resets. That is at around 130 requests/second. The backend server is
Lighttpd 1.4.11

Should I try building a version from SVN? Or is this a known issue?

Best Regards,

Michael Weck

1.02 children die under high load [ In reply to ]

phk at phk

Feb 1, 2007, 12:37 AM

Post #2 of 4 (635 views)

Permalink

In message <45C17985.3070105 at weck.us>, Michael Weck writes:

>I can get Varnish to run and forward requests to the backend server and
>serve up those requests, however the process seems to reset itself under
>load. When I run varnishstat the counter gets to about 10 seconds, then
>it resets. That is at around 130 requests/second. The backend server is
>Lighttpd 1.4.11

Run varnishd with "-d -d" arguments and type "param.show"

Make sure the threadpool maximum is larger than 1

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

1.02 children die under high load [ In reply to ]

steinove at vg

Feb 5, 2007, 1:44 AM

Post #3 of 4 (632 views)

Permalink

Poul-Henning Kamp wrote:
> In message <45C17985.3070105 at weck.us>, Michael Weck writes:
>
>> I can get Varnish to run and forward requests to the backend server and
>> serve up those requests, however the process seems to reset itself under
>> load. When I run varnishstat the counter gets to about 10 seconds, then
>> it resets. That is at around 130 requests/second. The backend server is
>> Lighttpd 1.4.11
>
Thats the same problem as we have, when running lighttpd 1.4.13 as the
backend, varnish resets when the traffic load gets high enough.

> Run varnishd with "-d -d" arguments and type "param.show"
>
> Make sure the threadpool maximum is larger than 1

Ive set threadpool max to 1000, we are not close to that number of
threads, it usually stays between 100-200.

Stein

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1.02 children die under high load [ In reply to ]

phk at phk

Feb 5, 2007, 5:16 AM

Post #4 of 4 (638 views)

Permalink

In message <45C6EE82.8020903 at vg.no>, Stein Ove Rosseland writes:
>Poul-Henning Kamp wrote:
>> In message <45C17985.3070105 at weck.us>, Michael Weck writes:
>>
>>> I can get Varnish to run and forward requests to the backend server and
>>> serve up those requests, however the process seems to reset itself under
>>> load. When I run varnishstat the counter gets to about 10 seconds, then
>>> it resets. That is at around 130 requests/second. The backend server is
>>> Lighttpd 1.4.11
>>
>Thats the same problem as we have, when running lighttpd 1.4.13 as the
>backend, varnish resets when the traffic load gets high enough.

Ok, then it's probably some of the missing error handling code on the
backend connections.

It's on the list.

--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.