On Tue, 2008-11-18 at 16:42 -0800, James D. Parra wrote:
Hello,
Trying to find why almost every process that requires IO has near 100% wait times.
Even a simple 'cp' command has enormous wait times and doesn't appear at or near the top of the list when running 'top'. This was occurring when writing to a raid, but have tested writing to the system drive and the same thing occurs.
Running the 'cp command copying a 19GB file from /tmp/file1 /tmp/file2 will take 50 minutes
The same command on another identical system will take 10 minutes.
Any ideas on what could be causing this?
hi james. The figures yo mentioned are not normal. Modern drives do 30-120MB per second. This week i saw same behaviour behaviour on several systems. Cause: 1) Memory leak in old applications (running for several weeks) Easily to detect whith top, showing the mem-usage. 2) mal-functioning NFS-server, causing stale-NFS-handles. All NFS-clients had loads over 20, very sluggish, apperently doing nothing. Check /var/log/messages. Ifso, do a unmount -f of your nfs-mointpoint. 3) hw about to die: read/write/seek-failures and retries are reported by syslog 4) Started up too many resource-pigs. Any chance of an "OOM-message" in syslog? 5) lots of other causes ;-8 hw -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org