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Home -> Community -> Mailing Lists -> Oracle-L -> RE: smon 4030 - quick ideas?
Sorry, left that out. Linux, RH I believe. Kernel is
2.4...ELsmp. ^^^^^^^^^^^^ arrgh. Well, since I have not seen a 4030 in 10g (since it uses mmap()), and there is no accompanying syscall failure in your info, I just presumed it was 9i or earlier. Since this is 10g and therefore mmap(), you might find that the problem is the frankenkernel. See if you can find the mmap() failure return. Watch /proc/meminfo too. The 2.4 RH "kernel" isn't the most brilliant VM mankind has seen. Since our product supports mixed linux clusters (e.g., sles/rh), I've had the luxury of doing a lot of sles8/rhel3 apples-apples testing and hands-down sles8 is more durable in the VM department than rhel3. It gets EVEN more freaky if you use that 4/4 split hugemem thingy...that thing acts more like a fish flopping around on a hot sidewalk than a kernel. Talking about thrashing for page tables...gee... You can bring rhel3 systems to their knees rather quickly with simple concurrent tar and dd executions of large files. Just hammer it... it will crush. But, if you don't really do much with rhel3, it can stay up as is the case with this system set up for scheduled productbuilds:
$ uname -a
Linux rhas3.pdx.polyserve.com 2.4.21-4.EL #1 Fri Oct 3 18:13:58 EDT 2003
i686 i686 i386 GNU/Linux
$ uptime
09:29:06 up 211 days, 17:35, 2 users, load average: 0.00, 0.00, 0.00
-- http://www.freelists.org/webpage/oracle-lReceived on Sat Jun 03 2006 - 11:30:22 CDT
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