Mac os process monitor mac os x#
Mac os process monitor full#
Mac os process monitor free#

the kernel source under bsd/vm/vm_unix.c describes this as 'Memory pressure indicator', although I've yet to see this as non-zero.

eg: dtrace -x aggsortkey -n 'profile-100 /!(curthread->state & 0x80)/ '.

Mac os process monitor full#

Not sure this one makes sense - once its full, ENOSPCĭTrace /var/log/system.log file system full messages System-wide: iostat 1, 'KB/t' and 'tps' are rough usage stats DTrace could be used to calculate a percent busy, using io provider probes atMonitor, 'disk0' is percent busy per-process: iosnoop (DTT), shows usage iotop (DTT), has -P for percent I/OĭTrace io:::done probe when /args->b_error = 0/įile systems: df -h swap: sysctl vm.swapusage, for swap file usage Activity Monitor → Activity Monitor → System Memory, 'Swap used' System-wide: netstat -s | grep bad, for various metrics per-interface: netstat -i, 'Ierrs', 'Oerrs' (eg, late collisions), 'Colls' System-wide: netstat -s, for saturation related metrics, eg netstat -s | egrep 'retrans|overflow|full|out of space|no bufs' per-interface: DTrace

System-wide: netstat -i 1, assume one very busy interface and use input/output 'bytes' / known max (note: includes localhost traffic) per-interface: netstat -I interface 1, input/output 'bytes' / known max Activity Monitor → Activity Monitor → Network, 'Data received/sec' 'Data sent/sec' / known max (note: includes localhost traffic) atMonitor, interface percent System Information → Hardware → Memory, 'Status' for physical failures DTrace failed malloc()s System-wide: vm_stat 1, 'pageout' per-process: anonpgpid.d (DTT), DTrace vminfo:::anonpgin (frequent anonpgin = pain) Instruments → Memory Monitor, high rate of 'Page Ins' and 'Page Outs' sysctl vm.memory_pressure

Mac os process monitor free#

System-wide: vm_stat 1, main memory free = 'free' + 'inactive', in units of pages Activity Monitor → Activity Monitor → System Memory, 'Free' for main memory per-process: top -o rsize, 'RSIZE' is resident main memory size, 'VSIZE' is virtual memory size ps -alx, 'RSS' is resident set size, 'SZ' is virtual memory size ps aux similar (legacy format) System-wide: uptime, 'load averages' > CPU count latency, 'SCHEDULER' and 'INTERRUPTS' per-cpu: dispqlen.d (DTT), non-zero 'value' runocc.d (DTT), non-zero '%runocc' per-process: Instruments → Thread States, 'On run queue' DTrace ĭmesg /var/log/system.log Instruments → Counters, for PMC and whatever error counters are supported (eg, thermal throttling) System-wide: iostat 1, 'us' + 'sy' per-cpu: DTrace Activity Monitor → CPU Usage or Floating CPU Window per-process: top -o cpu, '%CPU' Activity Monitor → Activity Monitor, '%CPU' per-kernel-thread: DTrace profile stack() This will hopefully get easier in the future, as tools include a USE method wizard or the metrics required to follow this easily. Many metrics require some math, inference, or quite a bit of digging. Some of the metrics are easy to find in various GUIs or from the command line (eg, using Terminal if you've never used Terminal before, follow my instructions at the top of this post).

Further notes about tools are provided after this table. This draws upon both command line and graphical tools for coverage, focusing where possible on those that are provided with the OS by default, or by Apple (eg, Instruments).

Mac os process monitor mac os x#

This is my example USE Method-based performance checklist for the Apple Mac OS X operating system, for identifying common bottlenecks and errors. USE Method: Mac OS X Performance Checklist