Hi @ll, thanks for answers to Bill Voight przemol Darren Dunham Roberto Fratelli They mostly pointed to the very usefull scripts included in the dtrace toolkit, available at http://opensolaris.org/os/community/dtrace/dtracetoolkit/ Brendan Gregg published some scripts on http://www.brendangregg.com/k9toolkit.html Also very good is the guide on http://www.sun.com/software/solaris/howtoguides/dtracehowto.jsp I did'nt have had a lot process creation or forking. After running 'topsyscall' and 'topsysproc' I identified some processes that made a lot of reads and writes. But these applications didn't change in the past months, so they were not likely the cause. A look at the syslog showed that the automounter tried to mount something on /net every minute. I disabled /net as we don't use it anyway. But the performance issue still stayed. Last (ugly) resort was to reboot the machine. Till now (~2h) that did it. But as the behaviour wasn't persistent but occured casually, I can't say, if we really got it. Maybe tomorrow or so ... Greetings Jan Dreyer Jan Dreyer wrote: > Hi managers, > > we have a E3500 (5.10 Generic_127111-06) with some trouble completing > it's job(s). The problem is, I can't identify the source of the dilemma. > > sar shows: > 13:55:17 %usr %sys %wio %idle > 13:55:19 11 89 0 0 > 13:55:20 10 88 0 2 > 13:55:24 10 89 0 1 > 13:55:26 10 89 0 1 > 13:55:27 9 91 0 0 > 13:55:29 6 94 0 0 > 13:55:31 4 96 0 0 > > so the processes are in system mode about 85-99%! That's way too much. > But I can't see, why this occurs. Obviously there is few IO, so this > doesn't block. > > Dtrace seems the answer, but I have no idea which of the millions of > screws I shall turn there ... > > Any hints here, where and how to look? > > Greetings and thanks in advance > Jan Dreyer > _______________________________________________ > sunmanagers mailing list > sunmanagers@sunmanagers.org > http://www.sunmanagers.org/mailman/listinfo/sunmanagers _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Thu Apr 3 09:14:12 2008
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