On 09/13/17 14:05, Yann Ylavic wrote:
Hi Norbert, can we keep the users@ mailing list CC-ed on this since it may be relevant for others too? Moreover people with a better knowledge of mod_perl than me could chime in... On Wed, Sep 13, 2017 at 1:33 PM, Norbert <ngrundma@xxxxxxxxxxxxxxx> wrote:thanks - but it does not help -The case seems to be mod_perl specific (I know very few about it), "normally" preforked processes have the lifetime given by these directives... Could it be a crash of children processes somehow, or a special handling of processes in mod_perl? The creation of multiple root processes at startup looks special to me, usually httpd has a single root process to maintain children (www:www) processes, is a root process still alive after the load? For others on the list, your results below:have a look, I use top in 1 second intervals and extracted the httpd processes which have the user www. The minus represent the 1 second gap: - - 30830 www 1 24 0 326M 31884K select 0 0:00 0.00% httpd 30832 www 1 27 0 326M 31636K select 4 0:00 0.00% httpd 30833 www 1 27 0 326M 31636K select 5 0:00 0.00% httpd 30834 www 1 27 0 326M 31636K select 1 0:00 0.00% httpd 30831 www 1 27 0 326M 31644K select 6 0:00 0.00% httpd 30835 www 1 27 0 326M 31632K select 0 0:00 0.00% httpd - 30830 www 1 24 0 326M 31884K select 0 0:00 0.49% httpd 30832 www 1 27 0 326M 31636K select 4 0:00 0.49% httpd 30833 www 1 27 0 326M 31636K select 5 0:00 0.49% httpd 30834 www 1 27 0 326M 31636K select 1 0:00 0.49% httpd 30831 www 1 27 0 326M 31644K select 6 0:00 0.49% httpd 30835 www 1 27 0 326M 31632K select 0 0:00 0.49% httpd - 30830 www 1 21 0 326M 31928K select 3 0:00 0.39% httpd 30832 www 1 27 0 326M 31636K select 4 0:00 0.39% httpd 30833 www 1 27 0 326M 31636K select 5 0:00 0.39% httpd 30834 www 1 27 0 326M 31636K select 1 0:00 0.39% httpd 30831 www 1 27 0 326M 31644K select 6 0:00 0.39% httpd 30835 www 1 27 0 326M 31632K select 0 0:00 0.39% httpd - 30830 www 1 21 0 330M 35880K select 3 0:00 0.59% httpd 30832 www 1 27 0 326M 31636K select 4 0:00 0.29% httpd 30833 www 1 27 0 326M 31636K select 5 0:00 0.29% httpd 30834 www 1 27 0 326M 31636K select 1 0:00 0.29% httpd 30831 www 1 27 0 326M 31644K select 6 0:00 0.29% httpd 30835 www 1 27 0 326M 31632K select 0 0:00 0.29% httpd - 30830 www 1 21 0 330M 35880K select 3 0:00 0.49% httpd 30832 www 1 27 0 326M 31636K select 4 0:00 0.20% httpd 30833 www 1 27 0 326M 31636K select 5 0:00 0.20% httpd 30834 www 1 27 0 326M 31636K select 1 0:00 0.20% httpd 30831 www 1 27 0 326M 31644K select 6 0:00 0.20% httpd 30835 www 1 27 0 326M 31632K select 0 0:00 0.20% httpd - 30830 www 1 21 0 330M 35900K select 4 0:00 0.39% httpd 30831 www 1 20 0 326M 31652K select 4 0:00 0.20% httpd 30835 www 1 20 0 326M 31636K select 6 0:00 0.10% httpd - 30830 www 1 20 0 330M 35900K select 1 0:00 0.29% httpd 30831 www 1 20 0 326M 31876K select 0 0:00 0.20% httpd 30835 www 1 20 0 326M 31636K select 5 0:00 0.10% httpd - 30831 www 1 20 0 326M 31932K select 7 0:00 0.29% httpd 30830 www 1 20 0 330M 35900K select 0 0:00 0.20% httpd 30835 www 1 20 0 326M 31636K select 5 0:00 0.00% httpd - 30831 www 1 20 0 326M 31932K select 7 0:00 0.20% httpd 30830 www 1 20 0 330M 35900K select 0 0:00 0.10% httpd 30835 www 1 20 0 326M 31636K select 5 0:00 0.00% httpd - 30831 www 1 20 0 326M 31932K select 7 0:00 0.10% httpd 30830 www 1 20 0 330M 35900K select 0 0:00 0.00% httpd 30835 www 1 20 0 326M 31636K select 5 0:00 0.00% httpd - 30830 www 1 20 0 330M 35900K select 0 0:00 0.00% httpd 30831 www 1 20 0 326M 31932K select 7 0:00 0.00% httpd 30835 www 1 20 0 326M 31636K select 5 0:00 0.00% httpd - 30830 www 1 20 0 330M 35900K select 0 0:00 0.00% httpd 30831 www 1 20 0 326M 31932K select 7 0:00 0.00% httpd 30835 www 1 20 0 326M 31636K select 5 0:00 0.00% httpd - - - and then no www user is activae any more... Note: the test machine is only used by myself. Regards, Norbert On 09/13/17 13:08, Yann Ylavic wrote:On Wed, Sep 13, 2017 at 10:10 AM, Norbert <ngrundma@xxxxxxxxxxxxxxx> wrote:Thanks, I set (on my testmachine): <IfModule mpm_prefork_module> MinSpareServers 4 MaxSpareServers 4 MaxConnectionsPerChild 100000 </IfModule> but nothing changes - the httpd processes with user www:www appear and disappear in top after seconds...We the above, there should be at least 4 processes that don't disappear before 100000 handling 100000 connections. But if more/other processes are created because of the load, they would be recycled as soon as the load decreases. What do you observe with the below ? <IfModule mpm_prefork_module> StartServers 4 ServerLimit 80 MinSpareServers 4 MaxSpareServers 40 MaxRequestWorkers 80 MaxConnectionsPerChild 0 </IfModule> Regards, Yann.-- Norbert Grundmann Inst. of Bioinformatics Muenster Tel. 0251 83 53 007 (Use *BSD, because Linux is a patch for Linux)
-- Norbert Grundmann Inst. of Bioinformatics Muenster Tel. 0251 83 53 007 (Use *BSD, because Linux is a patch for Linux) --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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