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19991112: 19991109: LDM memory leak on IRIX64 (fwd)

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  • Subject: 19991112: 19991109: LDM memory leak on IRIX64 (fwd)
  • Date: Fri, 12 Nov 1999 09:06:30 -0700 (MST)

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

---------- Forwarded message ----------
Date: Fri, 12 Nov 1999 08:46:48 -0700
From: Unidata Support <address@hidden>
To: Tom Yoksas <address@hidden>, address@hidden,
     address@hidden, address@hidden
Subject: 19991112: 19991109: LDM memory leak on IRIX64 



One note of clarification after I saw Robb's response to Tom engle:

The ldmadmin script sets the queue size to 250MB on dataproc.
That is the size of the current queue on dataproc:
-rw-rw-r--    1 ldmdp    ncar      258818048 Nov  8 22:50 ldm.pq

So the queue is not growing. So, they are not seeing any problem
with a growable queue. The memory map usage has just grown over time to
match that of the product queue usage from what I see.


Chiz


>From: Tom Yoksas <address@hidden>
>Organization: .
>Keywords: 199911120843.BAA12135

>
>Robb et. al.,
>
>Tom Engel of SCD sent me this note on the 9th.  I just had today got to
>login and see it.  Can you respond to Tom?
>
>Tom
>
>------- Forwarded Message
>
>Return-Path: address@hidden
>Received: from ncar.UCAR.EDU (ncar.ucar.edu [192.52.106.6])
>       by unidata.ucar.edu (8.8.8/8.8.8) with ESMTP id HAA17504
>       for <address@hidden>; Tue, 9 Nov 1999 07:38:30 -0700 (MST)
>Organization: .
>Keywords: 199911091438.HAA17504
>Received: from niwot.scd.ucar.edu (niwot.scd.ucar.edu [128.117.8.223])
>        by ncar.UCAR.EDU (8.9.1a/) with ESMTP id HAA14176;
>        Tue, 9 Nov 1999 07:38:29 -0700 (MST)
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>       Tue, 9 Nov 1999 07:38:29 -0700 (MST)
>Date: Tue, 9 Nov 1999 07:38:29 -0700 (MST)
>From: Tom Engel <address@hidden>
>Message-Id: <address@hidden>
>To: address@hidden, address@hidden
>Subject: LDM processes on dataproc
>
>Tom Yoksas, et.al.:
>
>It appears as if there's a relatively severe memory leak in the
>LDM processes ... specifically:
>
>Below are snapshots of the size of four LDM processes on dataproc
>at the beginning of each day over the last week.  As you can see,
>each of the processes "rpc.ldmd", "pqexpire", "pqact" and "pqbinstat"
>have doubled in size during the last week.
>
>Since dataproc is a production, interactive system, shared among
>numerous users, such unrestricted growth of daemons isn't good.
>
>A question:
>* Has UNIDATA seen such behavior in other systems?  If so, what
>  is UNIDATA's advice for dealing with this in an operational
>  setting?
>
>Two suggestions:
>1. the LDM system should be shut down and restarted on dataproc
>   in order to return the memory back to users
>2. UNIDATA should investigate and repair the memory leak.
>
>Thanks,
>Tom
>- ------------------------ Tom Engel --- Head, High Performance Systems Sectio
> n
>Scientific Computing Division   NCAR, P. O. Box 3000, Boulder, CO  80307-3000
>Phone 303-497-1270  Fax 303-497-1848  Pager 800-306-1988 (address@hidden)
>
>
>991103                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   110208   254688 ?           33:51 ldmdp    rpc.ldmd                    
>   
>APS:   110016   254496 ?           22:07 ldmdp    pqexpire                    
>   
>APS:   109552   254560 ?           26:33 ldmdp    pqact                       
>   
>APS:   103392   254864 ?           28:30 ldmdp    pqbinstat                   
>   
>
>991104                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   110352   254688 ?           42:16 ldmdp    rpc.ldmd                    
>   
>APS:   110160   254496 ?           25:54 ldmdp    pqexpire                    
>   
>APS:   109648   254560 ?           32:15 ldmdp    pqact                       
>   
>APS:   107584   254864 ?           33:45 ldmdp    pqbinstat                   
>   
>
>991105                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   124976   254688 ?           59:13 ldmdp    rpc.ldmd                    
>   
>APS:   124784   254496 ?           34:53 ldmdp    pqexpire                    
>   
>APS:   123856   254560 ?           42:02 ldmdp    pqact                       
>   
>APS:   120656   254864 ?           42:03 ldmdp    pqbinstat                   
>   
>
>991106                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   125008   254688 ?           72:07 ldmdp    rpc.ldmd                    
>   
>APS:   124784   254496 ?           41:24 ldmdp    pqexpire                    
>   
>APS:   123856   254560 ?           50:35 ldmdp    pqact                       
>   
>APS:   123632   254864 ?           49:03 ldmdp    pqbinstat                   
>   
>
>991107                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   214992   254688 ?           87:11 ldmdp    rpc.ldmd                    
>   
>APS:   214768   254496 ?           49:05 ldmdp    pqexpire                    
>   
>APS:   213840   254560 ?           59:59 ldmdp    pqact                       
>   
>APS:   200240   254864 ?           57:03 ldmdp    pqbinstat                   
>   
>
>991108                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   219376   254688 ?           93:27 ldmdp    rpc.ldmd                    
>   
>APS:   219152   254496 ?           53:15 ldmdp    pqexpire                    
>   
>APS:   218224   254560 ?           64:35 ldmdp    pqact                       
>   
>APS:   206016   254864 ?           61:25 ldmdp    pqbinstat                   
>   
>
>991109                                                          
>APS: RESM(kB) TOTM(kB) TTY_____ USERTIME USER____ COMMAND________             
>   
>APS:   248432   254688 ?          101:10 ldmdp    rpc.ldmd                    
>   
>APS:   248176   254496 ?           58:07 ldmdp    pqexpire                    
>   
>APS:   247248   254560 ?           70:12 ldmdp    pqact                       
>   
>APS:   236368   254864 ?           66:45 ldmdp    pqbinstat
>
>------- End of Forwarded Message
>