Re: [squid-users] System hung up

On Fri, 24 Oct 2003, Zand, Nooshin wrote:

> First sorry for non squid question.
> Have you experience Linux server hung up?

At times yes.

> I am running Redhat 9.0. The system is just hung up and I can not
> Found one single error message any where.
> All processes will stop and system need to be power cycled.

Such issues are usually either hardware or kernel related.

I would recommend you to start by running some hardware tests of the
system.

The first thing to test is memory. memtest86 is a good free memory
test tool. Let it run for at least 2 passes. If it does discover any
errors then your hardware is broken and needs to be fixed.

If this does not show any memory problems after at least 2 passes of
the normal test level then try to excersise the complete system a bit by
for example compiling the linux kernel tightly in a loop.

1. Build the Linux kernel as usual, but do not install it.

2. Run the following test script, repeating the kernel build over and over

  #!/bin/sh
  cd /usr/src/linux/
  cp .config linux.config
  set -e
  while true; do
    make mrproper
    cp linux.config .config
    make oldconfig
    make dep
    make clean
    make -j2 bzImage
    make -j2 modules
  done

and let it run over the night. If the test have aborted when you return in
the morning then your hardware is broken and needs to be fixed.

Regards
Henrik
Received on Fri Oct 24 2003 - 16:38:56 MDT