-----BEGIN PGP SIGNED MESSAGE-----
I'm trying to understand how the 2.4 kernel behaves with respect to
caching. I'm running the 2.4.17 kernel on an i686. The server is running
heartbeat, apache, tomcat, and a java based message routing application. 99%
of the work is comming from the java application which produces a lot of disk
and network I/O.
Am I correct in saying that the kernel will cache disk writes to memory if
there is ample free RAM? Then syncing it to disk at a later time?
With the above mentioned applications NOT running, %swapused = 0, disk cache
= 0. I've observed that when the applications start up, the kernel slowly
starts allocating free RAM for caching. It will stabalize with ~6MB of RAM
free. That's fine. But what I don't understand is that at the same time, swap
usage starts to increase and after a day or so, stabalizes at ~15MB. What is
being swapped out? Is the VMM utilizing swap when it's caching?
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org
-----END PGP SIGNATURE-----
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to firstname.lastname@example.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Tue May 07 2002 - 22:00:30 EST