Description of problem:
IMHO the following kernel behaviour is broken:
total used free shared buffers cached
Mem: 3960936 3812156 148780 0 195840 3054716
-/+ buffers/cache: 561600 3399336
Swap: 1048552 64 1048488
Why the hell does the kernel start swapping when 148780k free and 3054716k
cached? Okay, currently only 64k are swapped but this is unnecessary when
148780k are free, isn't it?
Version-Release number of selected component (if applicable):
Put 4 GB of RAM into a server and rebuild gcc, no swapping. Let the box run it's
normal services (httpd, vsftpd, sshd etc.) with low use (< 0.25 load) after it -
without rebooting the box between - and see what I posted above.
Kernel starts swapping when 148780k free/3054716k cached
Swapping first when RAM is completely used...
Based on the date this bug was created, it appears to have been reported
against rawhide during the development of a Fedora release that is no
longer maintained. In order to refocus our efforts as a project we are
flagging all of the open bugs for releases which are no longer
maintained. If this bug remains in NEEDINFO thirty (30) days from now,
we will automatically close it.
If you can reproduce this bug in a maintained Fedora version (7, 8, or
rawhide), please change this bug to the respective version and change
the status to ASSIGNED. (If you're unable to change the bug's version
or status, add a comment to the bug and someone will change it for you.)
Thanks for your help, and we apologize again that we haven't handled
these issues to this point.
The process we're following is outlined here:
We will be following the process here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping to ensure this
doesn't happen again.
Hum? Since when is Rawhide no longer maintained? The problem still exists in
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
I believe what you're seeing is the effect of the swap cache. Where something
was swapped out briefly (whilst there was memory pressure), and we keep
references to the swapped out version on disk just in case the situation
reoccurs, so that we don't have to write it out to swap a second time, we just
throw out the in-memory references.