My case is this, I'm using collectd [1] with rrdtool [2] to monitor some server. a) When I enable rrdtool plugin I can grab collectd process as top page fault process on top command. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ nFLT COMMAND 20128 root 18 0 4105m 35m 17m S 7.9 0.3 0:09.62 22k /opt/collectd/sbin/collectd b) Disabling rrdtool plugin dramastically decrease the number of page faults of collectd. c) I know that rrdtool plugin is known to generate a lot of small writes, as stated in [3]. Also I know the parameters to improving collectd's cache usage to save I/O, but this is not the question here.. AFAIK, major page faults are generated when data that is not yet present on RAM is loaded from disk, but in this case data is being write do disk, I can't see how writes can generate faults, but still, it seems that is happening, ... !? Is that possible? Cheers, [1] http://www.collectd.org [2] http://oss.oetiker.ch/rrdtool/ [3] https://collectd.org/wiki/index.php/Inside_the_RRDtool_plugin _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
