Free memory problems

I just spent 1 1/2 hours with BB service on the phone

when you go to ABOUT and choose HARDWARE you can see your storage and memory
My total memory shows 1 GB
my free memory show at the moment 193 mg

when I restart the PB the max free memory is about 680 mb
with no program running, turned of WIFI and Bluetooth is goes slowly down to about 510 mb
now after 4 hours not using the PB, and no app running it shows 193mb

I have problems of opening attachment, like pdf, xcl, doc, pictures, and my web browser crashes too often
TV is and streaming is slow and there is contant stop for spooling
cant see movies in Utube, sometimes Evernote does not open
why is my free memory so low when there is no app running
spoke with tech support, twice, send in 2 log reports, tech support could not find any fault, it actually tell me that they know about the problem and will fix it at the next update - if there ever will be one ...lol
so there will be an update to PB OS 2.2
does anyone has similar problem wit the memory?
The techie even looked at his PB and the max free memory show on his PB was 560mb
Thanks guys

here it is for the tech support:
Thank you for contacting BlackBerry Customer Support.
I have looked into the log but there is no specific odd symptom i could found. So what are you expecting is known issue and it can be fix with next software update. Hope you enjoy your playbook.
If you require further assistance, please don't hesitate to contact us.
Thank you again for contacting us.
Sincerely,
Fahmi
BlackBerry Customer Support
BlackBerry
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