Re: mysql hiding from top
On Mon, 2009-04-27 at 18:49 +0200, Zbigniew Szalbot wrote: hello, Today I have finally upgraded my system to 7.1-RELEASE and just noticing that mysql process is not being shown via the top command. PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 1612 root1 200 9212K 6716K pause 2 0:26 0.00% perl5.8.9 966 www 1 80 8236K 5452K nanslp 2 0:22 0.00% perl5.8.9 1594 root1 200 8740K 6220K pause 0 0:12 0.00% perl5.8.9 However, if you grep processes, you can see it should be displayed in the top entries. $ ps ax |grep mysql 32880 p0- I 0:00.00 /bin/sh /usr/local/bin/mysqld_safe... 32906 p0- S 1:33.72 /usr/local/libexec/mysqld... I can live with that but maybe there's some explanation for this? Thanks! From the manpage for top(1): FreeBSD NOTES DISPLAY OF THREADS The '-H' option will toggle the display of kernel visible thread con- texts. At runtime the 'H' key will toggle this mode. The default is OFF. Should reveal the missing thread(s). This was raised by someone else last November also examining mysqld. Look for a thread titled top incorrectly reporting process time. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
Hi-- On Apr 27, 2009, at 9:49 AM, Zbigniew Szalbot wrote: However, if you grep processes, you can see it should be displayed in the top entries. $ ps ax |grep mysql 32880 p0- I 0:00.00 /bin/sh /usr/local/bin/mysqld_safe... 32906 p0- S 1:33.72 /usr/local/libexec/mysqld... I can live with that but maybe there's some explanation for this? The process is sleeping-- perhaps it isn't using enough CPU to make it into the list using default sort ordering? Try top -o time, perhaps Regards, -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
Hello, Top doesn't show *all* processes. It shows the processes using the most cpu (by default. You can also display by io.) So, if mysqld isn't using a lot of cpu, it's not going to show up in the list. You might be able to force it to show up by giving top a number (of processes you want to see) that includes enough that mysqld will show up. Thank you Paul! Yes, I know that. Prior to upgrade mysql was always on top as it used most time. And I can see it now when it is active but it is quite strange that it does not get displayed when the system is idle. Not even when I do top -o time. Thanks! -- Zbigniew Szalbot ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
Hi there, The process is sleeping-- perhaps it isn't using enough CPU to make it into the list using default sort ordering? Try top -o time, perhaps No, this is a different issue. Take a look: PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 88268 www 1 470 40260K 29336K select 2 0:03 2.49% httpd 89632 www 1 440 33648K 23352K CPU0 0 0:00 0.78% httpd 89290 www 1 200 25456K 17760K lockf 2 0:01 0.68% httpd 89074 www 1 440 26384K 17696K select 2 0:00 0.20% httpd 32906 mysql 37 40 76636K 41664K sbwait 1 0:00 0.10% mysqld It does appear at times but it is showing 0:00 TIME. But compare it to the same mysql pid below: $ ps ax |grep mysql 32906 p0- S 1:41.77 /usr/local/libexec/mysqld This is what I find strange... :) -- Zbigniew Szalbot ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
On Apr 27, 2009, at 10:22 AM, Zbigniew Szalbot wrote: PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND [ ... ] 32906 mysql 37 40 76636K 41664K sbwait 1 0:00 0.10% mysqld It does appear at times but it is showing 0:00 TIME. But compare it to the same mysql pid below: $ ps ax |grep mysql 32906 p0- S 1:41.77 /usr/local/libexec/mysqld This is what I find strange... :) Ah-- I've heard rumors that top or something doesn't handle accounting for CPU time used by multithreaded processes very well... -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
Ah-- I've heard rumors that top or something doesn't handle accounting for CPU time used by multithreaded processes very well... OK. Well I have never had any problem with that on FreeBSD 7.0-RELEASE. It started misbehaving today right after an upgrade to 7.1-RELEASE. Like I said, I can really live with that! :) Thank you! -- Zbigniew Szalbot ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
On Apr 27, 2009, at 10:33 AM, Zbigniew Szalbot wrote: Ah-- I've heard rumors that top or something doesn't handle accounting for CPU time used by multithreaded processes very well... OK. Well I have never had any problem with that on FreeBSD 7.0- RELEASE. It started misbehaving today right after an upgrade to 7.1-RELEASE. Like I said, I can really live with that! :) True, although if it's readily reproducible, it would be good to fix. Thank you! You're most welcome, -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
--On Monday, April 27, 2009 11:49:55 -0500 Zbigniew Szalbot z.szal...@lcwords.com wrote: hello, Today I have finally upgraded my system to 7.1-RELEASE and just noticing that mysql process is not being shown via the top command. PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 1612 root1 200 9212K 6716K pause 2 0:26 0.00% perl5.8.9 966 www 1 80 8236K 5452K nanslp 2 0:22 0.00% perl5.8.9 1594 root1 200 8740K 6220K pause 0 0:12 0.00% perl5.8.9 However, if you grep processes, you can see it should be displayed in the top entries. $ ps ax |grep mysql 32880 p0- I 0:00.00 /bin/sh /usr/local/bin/mysqld_safe... 32906 p0- S 1:33.72 /usr/local/libexec/mysqld... I can live with that but maybe there's some explanation for this? Top doesn't show *all* processes. It shows the processes using the most cpu (by default. You can also display by io.) So, if mysqld isn't using a lot of cpu, it's not going to show up in the list. You might be able to force it to show up by giving top a number (of processes you want to see) that includes enough that mysqld will show up. -- Paul Schmehl, Senior Infosec Analyst As if it wasn't already obvious, my opinions are my own and not those of my employer. *** Check the headers before clicking on Reply. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mysql hiding from top
True, although if it's readily reproducible, it would be good to fix. I'd be happy to test but I do not know what to do/where to start. I know it is a permanent issue, because I even restarted the mysql server thinking that something is wrong that it is not being shown in top but the history repeated itself. Thanks Chuck - I appreciate the time you use to help. -- Zbigniew Szalbot ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
