Also note the capacity of your Mac's hard disk drive is overly full
and so your saved content is likely in competition to the OS X's
ability to function using limited resources it needs to work right.
That, and whatever is using the chip RAM isn't leaving scraps
big enough for anything else running and wasting CPU cycles
or whatever else you have going on.
Avoid adding a new layer of grief and misery over your Mavericks
OS X 10.9.x system. Resolve your issues where they are. Backup
your computer content to an externally enclosed hard drive and
choose one with its own AC power adapter, and consider using a
Clone utility (CarbonCopyCloner from Bombich, or SuperDuper from
maker sites, only; no adware or malware tainted third party) to save
a working fully bootable copy of your running OS X on a separate
hard disk drive capable of running the Mac from a Clone.
You can't hardly make enough backups; ones you can fully restore a
computer directly, & offline as needed; do not rely on a TimeMachine.
With a good backup, and a bootable clone, you could totally reinstall
a new Mavericks, &/or restore it w/ your content from external archives.
This on top of other good advice given in at least two threads you have
going on a similar topic; both need the same cure. Not a beta upgrade.
Save that idea for a different machine that has nothing you want on it.
Good luck & happy computing! 🙂