Hi Sebastian
Here are the RHEL versions we have used:
vmlinux-2.4.21-15.0.4.ELsmp - good vmlinux-2.4.21-20.ELsmp - bad vmlinux-2.4.21-27.0.1.ELsmp - good
2.4.21-20.ELsmp has a bug with file system caching of very large numbers of files. (generally only occurs with more than 3-4GB of RAM and lots and lots of small files as in cyrus) See https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=132155
This appears to be fixed in the latest (2.4.21-27.0.1 kernel)
Hope this helps, John
Sebastian Hagedorn wrote:
Hi,
--On 29. Dezember 2004 5:26:06 Uhr -0600 John Wade <[EMAIL PROTECTED]> wrote:
One other thing to note, if you are using RHEL 3, be sure to get the latest kernel. There was a bug in the file system caching code in the update 3 that kills any heavily used system with large amounts of memory (like our server) and lots of small files (like cyrus) This showed up in our conversion testing and we had to backrev the kernel until the new one was released.
could you please specify the exact kernel versions you are referring to? I'm not sure which version update 3 was. We are currently running 2.4.21-15.0.3.ELsmp. We can't really use a newer version, because we need IBM's sdd driver for SAN vpaths and they are slow in certifying new kernels ... maybe telling them about specific issues might speed up the process.
We haven't really had problems like the ones you are describing, but we have one where the loopback interface gets stuck. All RedHat has to say about that is to try the most recent kernel, of course.
Thanks, Sebastian Hagedorn -- Sebastian Hagedorn M.A. - RZKR-R1 (Gebäude 52), Zimmer 18 Zentrum für angewandte Informatik - Universitätsweiter Service RRZK Universität zu Köln / Cologne University - Tel. +49-221-478-5587
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