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Re: [ldm-users] high memory

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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