I have seen linux hang if the sysrq key gets pressed. Is it possible that that is happening? If you are using a serial console, a break signal emulates sysrq. On Thu, 22 Jul 2004, Charles wrote: > Dear All, > > Thank you for your suggestions. > > No, apmd is not running at the server, but if APM is turned on at the BIOS will it have any effects? (I have to goto check it) > Actually the problem does not happens everyday, so I'm not sure if it is related to power management issue. > > CPU usage is quite normal, at least always has IDLE cpu time. As of now in top: > 3:56pm up 9 days, 2:35, 1 user, load average: 0.91, 1.09, 1.38 > 120 processes: 119 sleeping, 1 running, 0 zombie, 0 stopped > CPU0 states: 19.0% user, 18.0% system, 0.0% nice, 62.0% idle > CPU1 states: 11.0% user, 8.0% system, 0.0% nice, 80.0% idle > Mem: 642740K av, 514852K used, 127888K free, 0K shrd, 53480K buff > Swap: 530040K av, 91420K used, 438620K free 282576K cached > > Actually the server has strange "no response" problem for over half year for a few times already, I just discovered I can "fix" it with "ENTER" key at the console login screen recently. If it looks like interrupt problem, I may try to find hardware to replace it and give it a try. > > btw, will a IDE Software RAID-1 create this problem? (both disks running UltraDMA mode already) > Motherboard is ASUS P2B-D, Dual P3-700Mhz Slot-1 > > > Best Regards, > Charles > > ----- Original Message ----- > From: "George Iosif" <giosif@xxxxxx> > To: <charles@xxxxxxx> > Cc: <linux-admin@xxxxxxxxxxxxxxx> > Sent: Wednesday, July 21, 2004 9:41 PM > Subject: Re: [Help] Strange Linux server no response problem, fixed byhitting ENTER at console! > > > > Hi Charles, > > > > Try stoping the APMD service and see if it solves your problem. > > > > > > George Iosif > > > > >>> "Charles" <charles@xxxxxxx> 07/21/04 11:51 AM >>> > > Dear all, > > > > Recently one of our servers randomly stop responding, but it does not > > hang. > > > > When the problem happens, all the network services stop responding, but > > the server is still running. Then many processes are queued up and cause > > the > > avg no. of process running sky to over 100 in 10min! If I was connecting > > an > > ssh to the server, it just stop response but the connection is still > > there. > > ping also has response. > > > > The most strange thing is, when I press an ENTER key at the console, the > > problem solved instantly and everything back to normal. Even my ssh > > connection > > will have response again. > > > > Our server's config: > > > > Hardware: Dual P3-700Mhz, 640M RAM, 2 x 10G IDE HDD running Software > > RAID-1 > > OS: RedHat Linux 8.0 > > kernel: kernel-2.4.18-14smp > > > > Special config: > > - freeswan-1.99_x509_0.9.15_2.4.18_14 installed > > > > Do you know what happens and kindly give me any suggestions? Thanks! > > > > > > Best Regards, > > Charles > > > > ---------------------------------------- > > My Inbox is protected by SPAMfighter > > 7157 spam mails have been blocked so far. > > Download free www.spamfighter.com today! > > > > - > > : send the line "unsubscribe linux-admin" > > in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > - > > : send the line "unsubscribe linux-admin" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > > ---------------------------------------- > My Inbox is protected by SPAMfighter > 7279 spam mails have been blocked so far. > Download free www.spamfighter.com today! > > - > : send the line "unsubscribe linux-admin" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > - : send the line "unsubscribe linux-admin" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
