Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Question about REALMEMSIZE option

Question about REALMEMSIZE option

Question about REALMEMSIZE option


I have a question about REALMEMSIZE option.

Definition says: Some SAS procedures use the REALMEMSIZE option to specify how much virtual memory the procedure can allocate and use without inducing excessive page swapping.

Then, I suppose is a parameter to control page swapping and to avoid excessive page swapping.

How does it prevent swapping??,

If the systems needs more memory than real memory available, then it starts to swap until the total memory reach the value of REALMEMSIZE, is correct??.
Is a limit value for the page swapping??

Any information about REALMEMSIZE working will be greatly apreciatted.

Thanks in advance.

RE: Question about REALMEMSIZE option

I believe it limits the amount of data loaded into memory at a time for processing.  If you load more data into memory that you can can hold, you'll get alot more pageswapping (ie swapping from physical to virtual memory).  For instance Proc sort will work in chunks, and the size of the chunks will depend on how much memory is allocated.   That's the way I've always interpreted it anyway.

Business Analyst, Code Monkey, Data Wrangler.
SAS Guru.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close