Q: Macpro 10.10 lag

I downloaded this app, and originally it says i used up to 3.2 GB memory without any program running and i only have about 200 MB left, but i kept on cleaning mutiple times (about 8 time) and now it has 2.44 GB avaliable. This is good, but also odd for me since I don't understand how can I be using 3.2 GB without any program running, and how can it clean up that much memory. Is the any setting problems that i should be aware of?  Thanks

sorry about posting at wrong section, this is actually the first time i post a forum, I will be more accurate next time

sorry but what is Etrecheck? and how do i run that ?

UPDATE. I tried running the game with "Memory Clean" running. And when i open the game I have about 1.2 GB avaliable; but as game process, the memory left became less and less eventually hit about 20 MB left (starts to lag a lot when less 300 MB was avaliable), it was mostly File Cache and App Memory; then I used "Memory Clean" and the memory left would raise back to about 900MB but it still lags a lot. Any thoughts or solutions?

Thanks

Btw, File Cache could sometimes be using about 2 GB memory and after clean it would become about 800 MB. and reguarding SSD and RAM, and really don't know what is considered good. I brought this computer in 2011 and used it only for school work and some games. And what is file cache anyways?

EtreCheck version: 2.0.6 (91)

Report generated October 20, 2014 at 1:53:27 PM CDT

Hardware Information: ℹ️

  MacBook Pro (17-inch, Mid 2010) (Verified)

  MacBook Pro - model: MacBookPro6,1

  1 2.53 GHz Intel Core i5 CPU: 2-core

  4 GB RAM Upgradeable

  BANK 0/DIMM0

  2 GB DDR3 1067 MHz ok

  BANK 1/DIMM0

  2 GB DDR3 1067 MHz ok

  Bluetooth: Old - Handoff/Airdrop2 not supported

  Wireless:  en1: 802.11 a/b/g/n

Video Information: ℹ️

  Intel HD Graphics - VRAM: 288 MB

  NVIDIA GeForce GT 330M - VRAM: 512 MB

  Color LCD 1920 x 1200

System Software: ℹ️

  OS X 10.10 (14A389) - Uptime: 1:27:6

Disk Information: ℹ️

  Hitachi HTS545050B9SA02 disk0 : (500.11 GB)

  S.M.A.R.T. Status: Verified

  EFI (disk0s1) <not mounted> : 210 MB

  Recovery HD (disk0s3) <not mounted>  [Recovery]: 650 MB

  Macintosh HD (disk1) /  [Startup]: 498.88 GB (358.76 GB free)

  Core Storage: disk0s2 499.25 GB Online

  HL-DT-ST DVDRW  GS23N 

USB Information: ℹ️

  Apple Inc. BRCM2070 Hub

  Apple Inc. Bluetooth USB Host Controller

  Apple Inc. Apple Internal Keyboard / Trackpad

  Razer Razer Imperator

  Apple Computer, Inc. IR Receiver

  Apple Inc. Built-in iSight

Gatekeeper: ℹ️

  Mac App Store and identified developers

Problem System Launch Agents: ℹ️

  [failed] com.apple.AirPlayUIAgent.plist

  [failed] com.apple.CallHistoryPluginHelper.plist

  [failed] com.apple.CallHistorySyncHelper.plist

  [failed] com.apple.cloudd.plist

  [failed] com.apple.cmfsyncagent.plist

  [failed] com.apple.coreservices.appleid.authentication.plist

  [failed] com.apple.nsurlsessiond.plist

  [failed] com.apple.telephonyutilities.callservicesd.plist

Problem System Launch Daemons: ℹ️

  [failed] com.apple.AssetCacheLocatorService.plist

  [failed] com.apple.awdd.plist

  [failed] com.apple.ctkd.plist

  [failed] com.apple.icloud.findmydeviced.plist

  [failed] com.apple.ifdreader.plist

  [failed] com.apple.nehelper.plist

  [failed] com.apple.nsurlsessiond.plist

  [failed] com.apple.tccd.system.plist

  [failed] com.apple.wdhelper.plist

Launch Daemons: ℹ️

  [loaded] com.adobe.fpsaud.plist Support

  [loaded] com.microsoft.office.licensing.helper.plist Support

  [running] com.qihoo.360safe.daemon.plist Support

User Launch Agents: ℹ️

  [loaded] com.adobe.ARM.[...].plist Support

  [loaded] com.genieo.completer.download.plist Support

  [loaded] com.genieo.completer.update.plist Support

  [loaded] com.google.keystone.agent.plist Support

  [invalid?] com.jdibackup.ZipCloud.autostart.plist Support

  [loaded] com.valvesoftware.steamclean.plist Support

User Login Items: ℹ️

  360 Internet Security for Mac Application (/Library/Application Support/Qihoo/360Safe/360SafeTray.app)

  Popup ApplicationHidden (/Library/Application Support/Pharos/Popup.app)

  HP Product Research Application (/Library/Application Support/Hewlett-Packard/Customer Participation/HP Product Research.app)

Internet Plug-ins: ℹ️

  Google Earth Web Plug-in: Version: 6.1 Support

  Default Browser: Version: 600 - SDK 10.10

  OfficeLiveBrowserPlugin: Version: 12.3.6 Support

  AdobePDFViewerNPAPI: Version: 10.1.9 Support

  FlashPlayer-10.6: Version: 15.0.0.152 - SDK 10.6 Support

  Silverlight: Version: 5.1.10411.0 - SDK 10.6 Support

  Flash Player: Version: 15.0.0.152 - SDK 10.6 Mismatch! Adobe recommends 15.0.0.189

  QuickTime Plugin: Version: 7.7.3

  CitrixICAClientPlugIn: Version: 11.4.3 - SDK 10.0 Support

  SharePointBrowserPlugin: Version: 14.4.5 - SDK 10.6 Support

  AdobePDFViewer: Version: 10.1.9 Support

  iPhotoPhotocast: Version: 7.0

  JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version

User Internet Plug-ins: ℹ️

  aliedit: Version: 1.0.0.5 - SDK 10.7 Support

  Picasa: Version: 1.0 Support

  npalicdo: Version: 1.0 - SDK 10.6 Support

  npCNTVLive2: Version: (null) - SDK 10.7 Support

Safari Extensions: ℹ️

  Omnibar

  Searchme

  SlickSavings

  Amazon Shopping Assistant

  Ebay Shopping Assistant

3rd Party Preference Panes: ℹ️

  Flash Player  Support

  Growl  Support

Time Machine: ℹ️

  Time Machine not configured!

Top Processes by CPU: ℹ️

      9% WindowServer

      0% AppleSpell

      0% fontd

      0% discoveryd

      0% Memory Clean

Top Processes by Memory: ℹ️

  73 MB Safari

  56 MB spindump

  47 MB mds_stores

  43 MB WindowServer

  34 MB Finder

Virtual Memory Information: ℹ️

  1.48 GB Free RAM

  1.45 GB Active RAM

  223 MB Inactive RAM

  878 MB Wired RAM

  6.83 GB Page-ins

  238 MB Page-outs

I downloaded AdwareMedic and removed Genieo, but what does this virus do? does it take up memory?

i checked the website, there are 8 GB, 12 GB and 16 GB etc.. but which one should I get? there's so many choices for same memory size.. also does SSD is needed? because my computer is pretty fast as long as I don't play game..