AppleScript: Checking memory every 30 sec. If it is about to out of memory then restart OS

since: 2015/06/14
update: 2015/06/14

A. 撰寫 Applescript:
    1. 開啟 Automator:

   
     2. Automator > 檔案 > 新增 > 應用程式 > 選擇:

    
     3. 工具程式 > 執行 AppleScript > 拖拉到右方

    4. 預設程式碼:
on run {input, parameters}
   
    (* Your script goes here *)
   
    return input
end run



    5. 修改如下:
on run {input, parameters}
   
    repeat
       
        # query memory free (MB)
        set vmStats to (text 12 thru -2 of (do shell script "vm_stat | grep 'Pages free'")) * 4096 / 1024 / 1024
        
        # if vmStats <= 500 MB
        if vmStats <= 500 then
       
            # show dialog message (for debug used)           
            #display dialog vmStats with title "Memory Free (MB)" buttons {"OK"} default button 1
           
            # kill your app   
            tell application "System Events"
                set ProcessList to name of every process
                    # "my_app" is your app name                   
                    if "my_app" is in ProcessList then
                        set ThePID to unix id of process "my_app"
                        # kill "my_app" process                      
                        do shell script "kill -KILL " & ThePID
                    end if
            end tell
   
            # restart the OS
            tell application "Finder"
                restart
            end tell
   
        end if
       
        # delay 30 second       
        delay 30
       
    end repeat
   
    return input
end run