Re: [us...@httpd] I/O accounting for all processes?
On 06/16/2010 06:49 AM, Scott Gifford wrote: On Tue, Jun 15, 2010 at 5:33 PM, Jakov Sosic jakov.so...@srce.hr mailto:jakov.so...@srce.hr wrote: I'm interested in measuring I/O that all apache processes are generating. I used mod_logio to solve a similar problem not too long ago, with good success: But it seems that this module records network I/O and not the filesystem I/O. Although it's good to know this too, I would prefer more the filesystem I/O currently :) Thank you for your answer anyway. It's good to know this information. -- |Jakov Sosic|ICQ: 28410271| PGP: 0x965CAE2D | = | start fighting cancer - http://www.worldcommunitygrid.org/ | - The official User-To-User support forum of the Apache HTTP Server Project. See URL:http://httpd.apache.org/userslist.html for more info. To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org from the digest: users-digest-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
Re: [us...@httpd] I/O accounting for all processes?
On 06/16/2010 06:16 PM, Jakov Sosic wrote: On 06/16/2010 06:49 AM, Scott Gifford wrote: On Tue, Jun 15, 2010 at 5:33 PM, Jakov Sosicjakov.so...@srce.hr mailto:jakov.so...@srce.hr wrote: I'm interested in measuring I/O that all apache processes are generating. I used mod_logio to solve a similar problem not too long ago, with good success: But it seems that this module records network I/O and not the filesystem I/O. Although it's good to know this too, I would prefer more the filesystem I/O currently :) I think this lies outside the scope of Apache and would have to be solved on the OS level. I have no idea how this could be done but if you find a way let us know as that would be interesting for me too. Regards, Dennis - The official User-To-User support forum of the Apache HTTP Server Project. See URL:http://httpd.apache.org/userslist.html for more info. To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org from the digest: users-digest-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
Re: [us...@httpd] I/O accounting for all processes?
On Wed, Jun 16, 2010 at 12:16 PM, Jakov Sosic jakov.so...@srce.hr wrote: On 06/16/2010 06:49 AM, Scott Gifford wrote: On Tue, Jun 15, 2010 at 5:33 PM, Jakov Sosic jakov.so...@srce.hr mailto:jakov.so...@srce.hr wrote: I'm interested in measuring I/O that all apache processes are generating. I used mod_logio to solve a similar problem not too long ago, with good success: But it seems that this module records network I/O and not the filesystem I/O. Although it's good to know this too, I would prefer more the filesystem I/O currently :) Ah, I see. I haven't done that before, but I can offer random suggestions. :-) You probably know this already, but if Apache is the main or only thing running on this server, tools like iostat and sar can get the information you are after on a system-wide basis. That would be by far the easiest solution. Otherwise, if you need to isolate Apache from other parts of the system, it looks like the information you are after is in /proc/PID/io on Linux. You could find all of Apache's PIDs, poll this information periodically, log it, then calculate usage/second over your log interval. Tools like mrtg are designed to manage this sort of data. iotop might be helpful too. You could probably also install some custom request handlers from a module or mod_perl (in a PerlLogHandlerhttp://perl.apache.org/docs/2.0/user/handlers/http.html#PerlLogHandleror PerlCleanupHandlerhttp://perl.apache.org/docs/2.0/user/handlers/http.html#PerlCleanupHandler) to read this file and record the I/O increase after every request. This might help work around your concern about PIDs changing. Those are the places I would start at least. Hope this is helpful, -Scott.
[us...@httpd] I/O accounting for all processes?
Hi to all. I'm interested in measuring I/O that all apache processes are generating. Is that possible somehow? I know that on Linux, after 2.6.28 there is I/O accounting per PID, but that's not satisfying for me because apache PIDs in prefork mode change and are not the same... I need this to calculate I/O needed for my load balancing cluster. I'm open to all ideas... -- |Jakov Sosic|ICQ: 28410271| PGP: 0x965CAE2D | = | start fighting cancer - http://www.worldcommunitygrid.org/ | - The official User-To-User support forum of the Apache HTTP Server Project. See URL:http://httpd.apache.org/userslist.html for more info. To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org from the digest: users-digest-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
Re: [us...@httpd] I/O accounting for all processes?
On Tue, Jun 15, 2010 at 5:33 PM, Jakov Sosic jakov.so...@srce.hr wrote: I'm interested in measuring I/O that all apache processes are generating. I used mod_logio to solve a similar problem not too long ago, with good success: http://httpd.apache.org/docs/2.0/mod/mod_logio.html Scott.
