I wrote a script that checks for available memory (using vmstat and awk), then cleans the memory if less than 25% is available. Then, after cleaning, my Mac says (yes, the dizzying voice of a robot) the whole amount of available memory out loud. I find this to be less intrusive than a pop-up message box, but my wife HATS because she has been working from home for several days, and it freaks her out.
I am looking for a way to set a global variable (or even touch / delete a temporary file) when keystrokes or mouse movements are detected. Thus, the robot's voice will be quiet when the machine is in standby mode. I searched for about 3 hours with no luck. I was on the right track with this snippet:
set idleTime to (do shell script "ioreg -c IOHIDSystem | perl -ane 'if (/Idle/) {$idle=(pop @F)/1000000000; print $idle,\"\";last}'") set initIdleTime to idleTime repeat while idleTime ≥ initIdleTime set idleTime to (do shell script "ioreg -c IOHIDSystem | perl -ane 'if (/Idle/) {$idle=(pop @F)/1000000000; print $idle,\"\";last}'") end repeat
It freezes the prompt, then prints the number when you move the mouse or press a key, but I don’t know perl, so I couldn’t change it. I would rather stick with bash if possible.
Btw here are the scripts if someone wants to use them. I changed the first one, copied the second and wrote the third. I have a third installed in cron to run every 10 minutes.
#!/bin/bash # -- guns # # Purge inactive memory with rapid i/o # # 26 November 2007 # 'killall $command' is still printing to the terminal # declare variables before= after= memPurged= pageSize= pagesPurged= AvailMem= timeout=5 # in seconds command="du /" showUsage="Usage: $(basename $0) [-h] [-t seconds] [-c "command"]" function printError() { echo >&2 $showUsage echo >&2 echo >&2 "See '$(basename $0) -h' for more details." } function printHelp() { echo "Purge inactive memory with rapid i/o." echo echo $showUsage echo echo "Supported Options" echo "-----------------" echo "-t{seconds}tSet the amount of time for the command to run. Default" echo "ttis 5 seconds." echo "-c{"command"}tSet the command to run. Default is 'du /'" echo "-httDisplay this help and exit" } function getMemFree() { # the "$3-0" bit is a dirty way to chop the period at the end vm_stat | awk '/Pages free/ {intMemFree=$3-0; print intMemFree}' } function getPageSize() { vm_stat | awk '/page size/ {print $8}' } # # Main # while getopts ":ht:c:" option; do case $option in h ) printHelp; exit;; t ) timeout=$OPTARG;; c ) command=$OPTARG;; ?) echo >&2 "Invalid option!n"; printError; exit 3 esac done shift $(($OPTIND-1)) before=$(getMemFree) purge # set variables after=$(getMemFree) let pagesPurged=$after-$before pageSize=$(getPageSize) # calculate and print let memPurged=($pagesPurged * $pageSize / 2**20) let availMem=($after * $pageSize / 2**20) printf "%d MB purged." $memPurged say $availMem
and
#!/usr/bin/python import subprocess import re # Get process info ps = subprocess.Popen(['ps', '-caxm', '-orss,comm'], stdout=subprocess.PIPE).communicate()[0] vm = subprocess.Popen(['vm_stat'], stdout=subprocess.PIPE).communicate()[0] # Iterate processes processLines = ps.split('\n') sep = re.compile('[\s]+') rssTotal = 0 # kB for row in range(1,len(processLines)): rowText = processLines[row].strip() rowElements = sep.split(rowText) try: rss = float(rowElements[0]) * 1024 except: rss = 0 # ignore... rssTotal += rss # Process vm_stat vmLines = vm.split('\n') sep = re.compile(':[\s]+') vmStats = {} for row in range(1,len(vmLines)-2): rowText = vmLines[row].strip() rowElements = sep.split(rowText) vmStats[(rowElements[0])] = int(rowElements[1].strip('\.')) * 4096 print '%d' % ( vmStats["Pages free"]/1024/1024 )
and finally
#!/bin/bash mf=$(perl ~/scripts/py/memfree.py) if [ "$mf" -lt 2000 ] then sh2 ~/scripts/memclean.sh else exit fi