Re: 20000216: [Fwd: LDM version 5.0.9] (fwd)

>
> Date: Wed, 16 Feb 2000 08:37:36 -0700
> From: Unidata Support <address@hidden>
> Reply-To: Jeff Ator <address@hidden>
> To: address@hidden
> Subject: 20000216: [Fwd: LDM version 5.0.9]
>
> >To: address@hidden
> >From: Jeff Ator <address@hidden>
> >Subject: [Fwd: LDM version 5.0.9]
> >Organization: .
> >Keywords: 200002161347.GAA24766
>
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> Here is some further information that might help you diagnose the
> problem in #1 below.  Every time pqexpire runs (at 51 minutes after each
> hour, via cron) it produces the following output:
>
> Feb 14 19:51:00 nco3n03 pqexpire[21594]: Starting Up
> Feb 14 19:52:08 nco3n03 pqexpire[21594]: Exiting
> Feb 14 19:52:08 nco3n03 pqexpire[21594]: > Up since:
> 20000214195100.898
> Feb 14 19:52:08 nco3n03 pqexpire[21594]: > Queue usage (bytes):28222800
> Feb 14 19:52:08 nco3n03 pqexpire[21594]: >          (nregions):   48895
> Feb 14 19:52:08 nco3n03 pqexpire[21594]: > nprods deleted 0
>
> The thing to note is that the "Queue usage" values that are printed, in
> terms of both bytes and nregions, stay unchanged with each hourly run of
> pqexpire!?  This seems to indicate that only around 28.2Mb of the
> available queue size are ever being used, even though (as explained in
> the original message), the queue was originally allocated with 100Mb of
> space.  This would explain why we are seeing the "Deleting oldest to get
> a queue slot" messages after only 6 hours (and why pqexpire thus has
> nothing to delete if it is only looking to purge products older than 12
> hours!), but the question then becomes "Why is only such a small
> percentage of the available queue space being utilized?".
>
> I would appreciate any insight you can provide on this perplexing
> issue.  Thanks very much!
>
> Sincerely,
> Jeff

Jeff,

We have one more question for you.  What are the sizes of the products you are
receiving?  It is possible that lots of very small products could cause this
problem.

Anne

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Anne Wilson                     UCAR Unidata Program
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