RAM usage apache2

[PatrickOtz]

Hello,

Hardware:
Intel Core i7 920
8192DDR3
1500GB HDD
Linux web 2.6.27.56-0.1-default #1 SMP 2010-12-01 16:57:58 +0100 x86_64 x86_64 x86_64 GNU/Linux
dist: openSUSE 11.1 ALL UP - TO - DATE
Hosted Sites: 86


i have a problem since 7 days. The RAM Usage from apache2 is at afternoon very high (7,21GB) The Server has only 8GB RAM and the child process was killed with many errors:

[Mon Jan 31 22:32:53 2011] [error] child process 1626 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 31878 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1628 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1629 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1631 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1632 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1633 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1650 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1654 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1655 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:53 2011] [error] child process 1907 still did not exit, sending a SIGKILL
[Mon Jan 31 22:32:54 2011] [error] could not make child process 11926 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 26667 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 14476 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 2066 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 20637 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 3820 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 27828 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 5911 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 5929 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 27244 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 30454 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 20174 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 14491 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 28128 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 5972 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 25669 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 20249 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 11547 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 27850 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 15426 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 22315 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 21340 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 5984 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 8196 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 5654 exit, attempting to continue anyway
[Mon Jan 31 22:32:54 2011] [error] could not make child process 19111 exit, attempting to continue anyway

my server-tuning.confg is:
# prefork MPM
<IfModule prefork.c>
StartServers 5
MinSpareServers 5
MaxSpareServers 10
ServerLimit 500
MaxClients 500
MaxRequestsPerChild 10000
</IfModule>

i have changed ALL server-tuning.conf settings a lot of times, but i didnt resolv the Problem. I have limited the the bandtwith with bw but they didnt resolv it.

I Have Attachets some Picture!

Please can u help me?