centos-bounces@xxxxxxxxxx wrote: > Running v5 64bit on a Dell 1950. > > A cluster of 3 DB machines, identical hardware. One of them suddenly > became slower 2 weeks ago. <snip proof the overall system is slow> <snip proof that the CPU is not the problem> > /var/log/messages was full of "ntpd[7313]: frequency error -1707 PPM > exceeds tolerance 500 PPM" messages. Sounds like your CMOS time-keeping chip may be dying. > I'm still kind of hoping it's a software issue, but chances are slim. > OTOH, I can't imagine any hardware problem that would exhibit these > symptoms. > > Any idea what to test? Any RAID setups go into self-repair mode? dd if=/dev/($nextdrive)1 of=/dev/null count=100000 (just compare just the read speeds off each spindle) for each disk on each system. ONE drive slower then the other blames the drive or the data thereon (RAID rebuild). ALL drives on the slow system blames the mobo. smartctl -t on each of the disks then smartctl -a Are these system busy serving customers, or can they be opened and drive sets swapped between systems? Insert spiffy .sig here: Life is complex: it has both real and imaginary parts. //me ******************************************************************* This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This footnote also confirms that this email message has been swept for the presence of computer viruses. www.Hubbell.com - Hubbell Incorporated** _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos