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[LDM #CTE-620214]: Satellite images slow or halt each day



The error messages mean that nothing was received by the downstream LDM process 
for 35 seconds -- which is odd because the corresponding upstream LDM process 
sends something at least every 30 seconds.

I suspect, therefore, that there was considerable network congestion during 
that time.

Because the "Desired product class" messages all have different MD5 signatures 
for the last successfully-received data-product, the downstream LDM did receive 
data products ever during the time of congestion.

All in all, I'm afraid the error messages don't show anything that would 
account for a multiple-hour outage of radar data. Do you have any other 
evidence?

I see your're using the default value of 500 MB for the size of the queue. This 
might be too small. Would you please send the output of the command "pqmon -S".

> Here you go,
> 
> hostname:              xxx.xxx.xxx
> os:                    Linux
> release:               4.1.12-124.25.1.el7uek.x86_64
> ldmhome:               /home/ldm
> LDM version:           6.13.6
> PATH:                  
> /home/ldm/ldm-6.13.6/bin:/home/ldm/decoders:/home/ldm/util:/home/ldm/bin:/home/ldm/decoders:/home/ldm/util:/home/ldm/bin:/home/ldm/perl5/bin:/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/ldm/.local/bin:/home/ldm/bin:/home/gempak/GEMPAK6.7.0/os/linux64/bin:/home/gempak/GEMPAK6.7.0/bin
> LDM conf file:         /home/ldm/etc/ldmd.conf
> pqact(1) conf file:    /home/ldm/etc/pqact.conf
> scour(1) conf file:    /home/ldm/etc/scour.conf
> product queue:         /home/ldm/var/queues/ldm.pq
> queue size:            500M bytes
> queue slots:           default
> reconciliation mode:   do nothing
> pqsurf(1) path:        /home/ldm/var/queues/pqsurf.pq
> pqsurf(1) size:        2M
> IP address:            0.0.0.0
> port:                  388
> PID file:              /home/ldm/ldmd.pid
> Lock file:             /home/ldm/.ldmadmin.lck
> maximum clients:       256
> maximum latency:       3600
> time offset:           3600
> log file:              /home/ldm/var/logs/ldmd.log
> numlogs:               7
> log_rotate:            1
> netstat:               /bin/netstat -A inet -t -n
> top:                   /bin/top -b -n 1
> metrics file:          /home/ldm/var/logs/metrics.txt
> metrics files:         /home/ldm/var/logs/metrics.txt*
> num_metrics:           4
> check time:            1
> delete info files:     0
> ntpdate(1):            /usr/sbin/ntpdate
> ntpdate(1) timeout:    5
> time servers:          ntp.ucsd.edu ntp1.cs.wisc.edu ntppub.tamu.edu 
> otc1.psu.edu timeserver.unidata.ucar.edu
> time-offset limit:     10

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: CTE-620214
Department: Support LDM
Priority: Normal
Status: Closed
===================
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