Re: differentiating apache children from parents ?
Josh Brooks wrote: I want to kill apache children that exceed a certain memory size - but I want to make sure only to kill children. If you're having memory problems with Apache, this is not the way to solve it. Rather, limit the number of children using 'MaxClients' or 'ServerLimit'. That will restrict your total memory usage. (Note that restricting the number of children can considerably improve overall performance, especially if it prevents the system from swapping.) There's also a setting that limits the total number of requests handled by a particular child before that child exits on its own. That can be useful for limiting the damage from memory leaks, for example. Using some of the newer MPMs, it's also possible to designate certain children to process memory-hungry requests and manage overall memory usage that way. Probably the most important point, though, is to carefully evaluate your design choices. mod_perl, for instance, is a notorious memory pig. (It's possible to limit memory usage with mod_perl, but it requires a great deal of care.) Trying to kill children is just a bad idea. In particular, there's no way to ensure that you kill a child between requests, so you're gauranteed to lose some requests if you go this way (and quite possibly hang a few TCP connections along the way). Don't do it. Tim Kientzle To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
Re: differentiating apache children from parents ?
Yes you can kill it if the pid is not 1, presuming you're not killing it during of a query processing. Alexander Varshavchick, Metrocom Joint Stock Company Phone: (812)118-3322, 118-3115(fax) On Fri, 24 Jan 2003, Josh Brooks wrote: > Date: Fri, 24 Jan 2003 05:33:27 -0800 (PST) > From: Josh Brooks <[EMAIL PROTECTED]> > To: Varshavchick Alexander <[EMAIL PROTECTED]> > Cc: [EMAIL PROTECTED] > Subject: Re: differentiating apache children from parents ? > > > I want to kill apache children that exceed a certain memory size - but I > want to make sure only to kill children. Is your method a workable way of > doing that ? That is, I would test it and if it is +not+ 1 then I would > be ok to kill it, since it is not the parent ? > > > > On Fri, 24 Jan 2003, Varshavchick Alexander wrote: > > > you can look at the parent pid of the process in question wether it is 1 > > or not: > > > > ps xa -oppid -p _PID_ > > > > But depending on what you're trying to do afterwards (for example kill the > > process if you determine by some external script that there are too many > > apaches running and you're not satisfied with the native apache process > > maintanance mechanism), there can be better ways... > > > > Regards > > > > > > Alexander Varshavchick, Metrocom Joint Stock Company > > Phone: (812)118-3322, 118-3115(fax) > > > > On Fri, 24 Jan 2003, Josh Brooks wrote: > > > > > Date: Fri, 24 Jan 2003 05:22:00 -0800 (PST) > > > From: Josh Brooks <[EMAIL PROTECTED]> > > > To: [EMAIL PROTECTED] > > > Subject: differentiating apache children from parents ? > > > > > > > > > Hello, > > > > > > Is there any way to tell, simply from /proc info and/or ps output if a > > > certain httpd PID is a child or the parent ? > > > > > > If yes, is this method applicable on any OS (linux) ? > > > > > > thanks. > > > > > > > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > > > with "unsubscribe freebsd-questions" in the body of the message > > > > > > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
Re: differentiating apache children from parents ?
I want to kill apache children that exceed a certain memory size - but I want to make sure only to kill children. Is your method a workable way of doing that ? That is, I would test it and if it is +not+ 1 then I would be ok to kill it, since it is not the parent ? On Fri, 24 Jan 2003, Varshavchick Alexander wrote: > you can look at the parent pid of the process in question wether it is 1 > or not: > > ps xa -oppid -p _PID_ > > But depending on what you're trying to do afterwards (for example kill the > process if you determine by some external script that there are too many > apaches running and you're not satisfied with the native apache process > maintanance mechanism), there can be better ways... > > Regards > > > Alexander Varshavchick, Metrocom Joint Stock Company > Phone: (812)118-3322, 118-3115(fax) > > On Fri, 24 Jan 2003, Josh Brooks wrote: > > > Date: Fri, 24 Jan 2003 05:22:00 -0800 (PST) > > From: Josh Brooks <[EMAIL PROTECTED]> > > To: [EMAIL PROTECTED] > > Subject: differentiating apache children from parents ? > > > > > > Hello, > > > > Is there any way to tell, simply from /proc info and/or ps output if a > > certain httpd PID is a child or the parent ? > > > > If yes, is this method applicable on any OS (linux) ? > > > > thanks. > > > > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > > with "unsubscribe freebsd-questions" in the body of the message > > > To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
Re: differentiating apache children from parents ?
On Fri, Jan 24, 2003 at 05:22:00AM -0800, Josh Brooks typed: > > Hello, > > Is there any way to tell, simply from /proc info and/or ps output if a > certain httpd PID is a child or the parent ? Yes, use "ps xalw | grep httpd". In the third column you see the processes' PPID (Parent Proces ID). All except one will have the same PPID. The one proces with PPID=1 is the parent, the rest are its children. > If yes, is this method applicable on any OS (linux) ? AFAIK, on any Unix-like OS. Although the format of the ps output may differ. > > thanks. > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
Re: differentiating apache children from parents ?
you can look at the parent pid of the process in question wether it is 1 or not: ps xa -oppid -p _PID_ But depending on what you're trying to do afterwards (for example kill the process if you determine by some external script that there are too many apaches running and you're not satisfied with the native apache process maintanance mechanism), there can be better ways... Regards Alexander Varshavchick, Metrocom Joint Stock Company Phone: (812)118-3322, 118-3115(fax) On Fri, 24 Jan 2003, Josh Brooks wrote: > Date: Fri, 24 Jan 2003 05:22:00 -0800 (PST) > From: Josh Brooks <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Subject: differentiating apache children from parents ? > > > Hello, > > Is there any way to tell, simply from /proc info and/or ps output if a > certain httpd PID is a child or the parent ? > > If yes, is this method applicable on any OS (linux) ? > > thanks. > > > To Unsubscribe: send mail to [EMAIL PROTECTED] > with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
differentiating apache children from parents ?
Hello, Is there any way to tell, simply from /proc info and/or ps output if a certain httpd PID is a child or the parent ? If yes, is this method applicable on any OS (linux) ? thanks. To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
