Jeff,
Kind-of sounds like I/O contention... what's your disk configuration? Do
you run RAID? If so, what kind? What do you observe if you monitor
"iostat -x 5" while the problem is occuring?
Art
On Mon, 25 Oct 2010, Gilbert Sebenste wrote:
On Mon, 25 Oct 2010, Jeff Lake - Admin wrote:
Art and all,
what I noticed first with this new system was a horrible lag in writing the
NEXRAD3 and LIGHTNING files to disk
watching the incoming feed ( ldmadmin watch -f NEXRAD3) the file time and
my receive time were the
expected 45sec to 90sec delay, but the write to disk was at least 4 minutes
sometimes 6+ later ..
it seems to have settled down been watching it today with all the radar
returns across the conus
don't see any lag ..
I use bin/pqmon every once and a while ..
is there a way I can query the queue to see the max age it has for a
certain product??
just want to see where my problem lies if I see lags writing to disk again
Jeff,
If your disk RPM isn't at least 7200, your I/O is going to be bad with
Level2/3 feeds.
*******************************************************************************
Gilbert Sebenste ********
(My opinions only!) ******
Staff Meteorologist, Northern Illinois University ****
E-mail: sebenste@xxxxxxxxxxxxxxxxxxxxx ***
web: http://weather.admin.niu.edu **
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