[CentOS] Server spontaneously rebooting under RHEL-4
craigwhite at azapple.com
Tue Mar 28 14:21:42 UTC 2006
you are aware of the support resources available for RHEL and Oracle
right? There also is a nahant-list which is Red Hat's mail list for
Just wanting to point out the perhaps more logical places to seek
assistance though I am sure that the CentOS team is flattered by your
asking for help on this list.
On Tue, 2006-03-28 at 08:16 -0600, Benjamin J. Weiss wrote:
> Sorry, it's an HP/Compaq ML-530. It didn't do this until I changed the
> OS, so I doubt that it's a BIOS issue.
> Leonard Isham wrote:
> >On 3/28/06, Benjamin J. Weiss <benjamin at birdvet.org> wrote:
> >>Hey, y'all! :)
> >>I've got an RHEL-4 server (yep, I know it's not CentOS, but hey we gotta
> >>send some money RH's way to keep CentOS up and going! ) that's running
> >>Oracle 10g. This same hardware worked just fine for over a year running
> >>RHEL-AS-2.1 and Oracle 9i. Now we're getting spontaneous reboots when
> >>running oracle processes that eat up a bunch of resources. I don't know
> >>where to go from here.
> >I didn't see a mention of the hardware type, but some systems have a
> >BIOS setting to reboot if the hardware doesn't detecet any "activity"
> >for a period of time. Check for that setting and disable that
> >feature. This may solve the issue. If not at least let you see the
> >crash if there is one.
> >>It's got dual hyper-threading processors set to hyperthreading mode, and
> >>I understand that the 2.6 kernel used to have HT issues, but I thought
> >>that'd been solved. The kernel we're running is: 2.6.9-22.0.2.ELsmp
> >>(yeah, not the latest, I haven't had a chance lately to test and update
> >>the patches).
> >>I think the kernel settings are correct, what with 4gigs of ram:
> >>[root at sibrsdbs etc]# cat sysctl.conf
> >># Kernel sysctl configuration file for Red Hat Linux
> >># For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
> >># sysctl.conf(5) for more details.
> >># Controls IP packet forwarding
> >>net.ipv4.ip_forward = 0
> >># Controls source route verification
> >>net.ipv4.conf.default.rp_filter = 1
> >># Do not accept source routing
> >>net.ipv4.conf.default.accept_source_route = 0
> >># Controls the System Request debugging functionality of the kernel
> >>kernel.sysrq = 0
> >># Controls whether core dumps will append the PID to the core filename.
> >># Useful for debugging multi-threaded applications.
> >>kernel.core_uses_pid = 1
> >># oracle settings
> >>kernel.shmall = 2097152
> >>kernel.shmmax = 2147483648
> >>kernel.shmmni = 4096
> >>kernel.sem = 250 32000 100 128
> >>#fs.file-max = 65536
> >>net.ipv4.ip_local_port_range = 1024 65000
> >>I don't know how to look for the core dump, if there was one. I don't
> >>see anything named 'core' in the /root directory.
> >>I'm sucking wind, any suggestions?
> >>CentOS mailing list
> >>CentOS at centos.org
> >Leonard Isham, CISSP
> >Ostendo non ostento.
> >CentOS mailing list
> >CentOS at centos.org
> CentOS mailing list
> CentOS at centos.org
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