Cherokee reaches load of 30

Hi,


Today it was the second time Cherokee (0.6.1b1373) had an
extremely big
load around 30. Does anyone have an idea how to debug this
issue?

Or might know a cause of this failure?


There is currently no logging on the webserver (big traffic
eater). I'll
ask if the maintainer can make a graph of the webservers
load per 5
minutes or so.



Stefan

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Stefan de Konink wrote:
> 
> Hi,
> 
> Today it was the second time Cherokee (0.6.1b1373) had
an extremely big
> load around 30. Does anyone have an idea how to debug
this issue?
>
> Or might know a cause of this failure?

First of all someone should verify what kind of services
are running on that machine.

It could be useful to run a script to poll load level from
/proc
or from uptime(1) and when the load goes up it can append to
a text file
the list of processes along with the CPU usage,
i.e. (completely untested):

while sleep 5
do
	# get load average (only integer part)
	LOADAVG=`uptime | cut -d, -f 3 | cut -d: -f 2 | cut -d. -f
2`
	# poll load usage

	[ $LOADAVG -lt 4 ] && continue

	# ok load usage greater than high water mark
	# get process usage

	# get date and time
	date >> file.txt

	# get list of open sockets
	netstat -a >> file.txt

	# get process and CPU usage
	top -d 3 -n 1 -b >> file.txt
done

> There is currently no logging on the webserver (big
traffic eater). I'll
> ask if the maintainer can make a graph of the
webservers load per 5
> minutes or so.

OK, it could also be a DDoS attack, so maybe enabling
logging
could clarify what's really happening.

		Greetings.

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"A.D.F." wrote:
> 
> Stefan de Konink wrote:
> >
> > Hi,
> >
> > Today it was the second time Cherokee (0.6.1b1373)
had an extremely big
> > load around 30. Does anyone have an idea how to
debug this issue?
> >
> > Or might know a cause of this failure?
> 
> First of all someone should verify what kind of
services
> are running on that machine.
> 
> It could be useful to run a script to poll load level
from /proc
> or from uptime(1) and when the load goes up it can
append to a text file
> the list of processes along with the CPU usage,
> i.e. (completely untested):
> 
> while sleep 5
> do
>         # get load average (only integer part)
>         LOADAVG=`uptime | cut -d, -f 3 | cut -d: -f 2 |
cut -d. -f 2`
>         # poll load usage

The right instructions are:
          LOADAVG=`uptime | cut -d, -f 3 | cut -d: -f 2 |
cut -d. -f 1`

-- 
Nick Name:     A.D.F.
E-Mail:        <adefacc () tin ! it>
E-Mail-Format: Plain Text only (please); view using font
Courier New
--
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