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Re: 19990210: ldm -'Deleting oldest to make space'

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  • Subject: Re: 19990210: ldm -'Deleting oldest to make space'
  • Date: Wed, 10 Feb 1999 09:37:17 -0700 (MST)
On Wed, 10 Feb 1999, Unidata Support wrote:

> >To: address@hidden
> >From: address@hidden
> >Subject: ldm -'Deleting oldest to make space'
> >Organization: .
> >Keywords: 199902101524.IAA19744
> 
> 
> Hi.
> 
> We're getting thousands of these messages in ldmd.log:
> 
> Feb 10 03:00:30 cirrus 128.118.28.2[18274]: Deleting oldest to make space 
> 7776 bytes


Hiya,

This is the result of the LDM queue being too small, it also causes the
LDM to do a lot of extra work and create large product latencies and loose
data.  To fix the problem one needs to make the queue larger, the queue
should be at least 65 megabytes. If it's already 65 MG, increase it by
20%. To increase the queue size:

% vi bin/ldmadmin  
- look for variable $pq_size, increase it.
% ldmadmin stop
% ldmadmin delqueue
% ldmadmin mkqueue
% ldmadmin start

Robb...

> Feb 10 03:00:31 cirrus 128.118.28.2[18274]: Deleting oldest to make space 
> 7776 bytes
> Feb 10 03:00:33 cirrus last message repeated 2 times
> Feb 10 03:00:33 cirrus 128.118.28.2[18274]: Deleting oldest to make space 
> 3704 bytes
> 
> In ldmd.conf our feed requests are:
> (unidata suggested using the ip address to fool routers some time ago).
>  
> request MCIDAS  ".*" navier.meteo.psu.edu
> request DDPLUS  ".*" 128.118.28.2
> request HRS  ".*" 128.118.28.2
> 
> A traceroute looks like:
> traceroute to navier.meteo.psu.edu (128.118.28.2), 30 hops max, 40 byte 
> packets
>  1  MainBrain.smsu.edu (146.7.200.254)  1 ms  1 ms  1 ms
>  2  Heimdall.smsu.edu (146.7.25.6)  4 ms  10 ms  8 ms
>  3  Springfield-2-atm1-0-134.mo.more.net (150.199.234.241)  134 ms  133 
> ms  63 ms
>  4  12.127.112.201 (12.127.112.201)  137 ms  93 ms  92 ms
>  5  br1-a350s1.sl9mo.ip.att.net (12.127.4.6)  92 ms  51 ms  89 ms
>  6  12.127.9.170 (12.127.9.170)  124 ms  133 ms  52 ms
>  7  br1-p330.n54ny.ip.att.net (12.127.9.130)  63 ms  72 ms  66 ms
>  8  ar1-a300s1.n54ny.ip.att.net (12.127.0.5)  69 ms  58 ms  59 ms
>  9  12.127.244.62 (12.127.244.62)  337 ms  213 ms  246 ms
> 10  penn-state.psc.net (192.88.115.90)  192 ms  181 ms  293 ms
> 11  Willard1-Fddi5-0.gw.psu.edu (128.118.100.4)  271 ms  261 ms  245 ms
> 12  * * *
> 13  navier.meteo.psu.edu (128.118.28.2)  211 ms *  70 ms
> 
> This has been going on for months now.  Any suggestions?  Ignore it?
> 
> Bill
> 
> 
> 
>                  ________________________________
> 
> William T. Corcoran                 Southwest Missouri State University
> address@hidden            Springfield, Missouri 65804
> (417) 836-5781                      Department of Geography
>     http://cirrus.smsu.edu   for my view of the weather
> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================