//
// summary metrics
//
// these expressions are evaluated by pmie(1)
//
// use the default interval between expression evaluation (currently
// 10 seconds), and re-configure via -t command line arg to pmie
// (see Install)

// CPU utilization
//
cpuse   = "(kernel.percpu.cpu.sys + kernel.percpu.cpu.user)";
ncpu    = "hinv.ncpu";

// average CPU utilization
summary.cpu.util = avg_inst $cpuse;

// proportion of CPUs that are busy
summary.cpu.busy = (count_inst $cpuse > 0.7) / $ncpu;

// Disk utilization
//
diskio  = "disk.dev.total";
ndisk   = "hinv.ndisk";

// average spindle activity
summary.disk.iops = avg_inst ($diskio);

// proportion of disk spindles that are busy
summary.disk.busy = (count_inst $diskio > 40) / $ndisk;

// Network interface utilization
//
netio   = "network.interface.total.packets";

// average network interface activity
summary.netif.packets = avg_inst ($netio);

// proportion of network interfaces that are busy
summary.netif.busy = (count_inst $netio > 400) / (count_inst $netio >= 0);