Messages in this thread | | | Date | Fri, 28 Dec 2001 12:01:45 +0200 | From | Matti Aarnio <> | Subject | Re: 2.4.17 still croaks under heavy load |
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On Thu, Dec 27, 2001 at 11:06:50PM -0800, Phil Oester wrote: > Have a webserver running Zope (specifically the ZEO db) which dies every > few days with no messages in syslog. Locks up so tight a powercycle is > required to recover. System has 1gb RAM, 2xSMP, kernel configured with > 4gb highmem.
Do you have RAID1 on the disks ? Apparently "noapic" option helps, e.g. breaking the SYMMETRIC part of SMP. You may also try "nmi_watchdog=1", if you have serial console attached to the box for kernel message logging (and command).
> Since the kernel doesn't provide any info in syslog when it dies, I just > ran a vmstat 30 to a file and waited for the next untimely demise. > Here's what happened when it died last time. Note the sudden surge in > disk activity (bi)
Yes, looks familiar. My hangups have been during high disc activity too. My box is located into a place into which I have difficult access, e.g. I can't use it to collect the debug data, and do magics (press reset) to recover.
> I'd be more than willing to collect any other data required here, just > let me know what would be of assistance. Note though that I only have > remote access to this box, so getting magic sysrq info could be > difficult/impossible (tho I do have console access if that helps). > > Thanks, > > Phil Oester
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