I was under the impression that only 2GB was mapped to userspace, and the other 2GB was mapped for kernel data, although I could be wrong.
Jon On Tue, 5 Aug 2003, Robert Vaughn wrote: > During some tests we have observed some odd memory > behavior in Linux. It appears that our Linux server > with 10 GB of RAM will only allocate a maximum of 2.8 > GB per process. When we try to exceed 2.8 GB per > process the process dies. We are interested in > finding why and how to fix the behavior. > > Our questions are... > 1) What is limiting the amount of memory that we can > access? I understand that we should not be able to > access above 4GB per process on a 32 bit system. > However, being able to access only 2.8GB is not very > good. > 2) What can we do about the rather low memory limit? > > Following is some information about what we have been > doing. I can provide additional details as requested. > > The program... > The program that we're using to perform the tests is a > Perl script that consumes a specified amount of memory > through a loop of stuffing characters into an array. > I wrote the Perl script. We are going to create a C++ > version of the Perl script. However, we do not think > that Perl is the problem. Previously I have used the > same script to consume about 3.8 GB of memory before > the script gets killed. When the script runs we > observe no swap behavior. We can run multiple scripts > of say 2GB memory consumption and eat up the entire > free memory space and then start eating into swap. > > Background... > Intel Xeon 8X > 10 GB ram > Redhat As 2.1, 2.4.9-e.3enterprise > > Memory Info with No Load on Server... > Total: 10303272 KB > Used: 315512 KB > Free: 9987760 KB > > > Thanks, > ...Robert > > > __________________________________ > Do you Yahoo!? > Yahoo! SiteBuilder - Free, easy-to-use web site design software > http://sitebuilder.yahoo.com > > > -- > redhat-list mailing list > unsubscribe mailto:[EMAIL PROTECTED] > https://www.redhat.com/mailman/listinfo/redhat-list > -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED] https://www.redhat.com/mailman/listinfo/redhat-list
