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LO42821: DOMINO SERVER CRASH DUE TO LOW MEMORY CONDITION- VERITAS BACKUP SOFTWARE NOT REALLOCATION MEMORY

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APAR status

  • Closed as user error.

Error description

  • The customer is experiencing numerous low memory crashes. The
tasks are usually
NSERVER.EXE or HTTP.EXE
 The NSDs indicate a memory allocation issue with the veritas
backup software.
Memory dumps are not showing a gradual leak, but instead memory
is increasing
and decreasing within normal ranges, then suddenly when domino
crashes, the
BLK_NSF_BACKUP_CONTEXT memory block shows 934MB memory in this
block
alone.  Customer explained that backup will fail and shortly
after this domino
will also fail.  The crashes indicate a low memory condition.
nserver process
shows maxed out at 2 gigs of memory space.  Customer has some
large databases
two in particular, which maintenance  will not run on because
internal tables
are maxed out.  However backups
do periodically complete with out issue.



<@@ ------ Notes Memory -> Usage Summary -> Top 10 Memory Block
Usage -> Memhandles By Size :: (Shared) (Time 07:26:14) ------
@@>

  Type  TotalSize      Count    Typename
-----------------------------------------------------------
0x82e9  994469204     102103  BLK_NSF_BACKUP_CONTEXT
0x82cd  535330816        136  BLK_UBMBUFFER
0x82cc    9922560        136  BLK_UBMBCB
0x8311    7340032          7  BLK_NIF_POOL
0x834a    4718592          5  BLK_GB_CACHE
0x8252    4194304          4  BLK_NSF_POOL
0x8a05    3300000          1  BLK_NET_SESSION_TABLE
0x93ba    3093790        742  BLK_VA_PNOVEC
0x9a88    1703936          4  ???
0x938d    1245432          3  BLK_SHARED_UNK_HASH

Local fix

  • NSF_BACKUP_MEMORY_CONSTRAINED=1
NSF_BACKUP_MEMORY_LIMIT=104857600

Problem summary

  • 



Problem conclusion


    

  • 



Temporary fix


    

  • 



Comments


    

  • This APAR is associated with SPR# DSTT6APL83.
See tech note 1211241: Notes.ini variables to control the
 maximum amount of shared memory the backup process will
 consume before using temporary files on disk.  The Notes.ini
 variable "NSF_Backup_Memory_Constrained=1" enables the feature
 with a default size of 20Mb, the Notes.ini variable
 "NSF_Backup_Memory_Limit" is provided to tune that size.  The
 default is NSF_Backup_Memory_Limit=20000000.

    



APAR Information




    

  • APAR number
    LO42821
    • 

  • Reported component name
    DOMINO SERVER
    • 

  • Reported component ID
    5724E6200
    • 

  • Reported release
    700
    • 

  • Status
    CLOSED  USE
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2009-07-29
    • 

  • Closed date
    2010-09-10
    • 

  • Last modified date
    2010-09-10
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    



Applicable component levels


    








      
              
                            

              

              [{"Business Unit":{"code":"BU055","label":"Cognitive Applications"},"Product":{"code":"SSKTMJ","label":"Lotus Domino"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"7.0","Edition":"","Line of Business":{"code":"","label":""}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            10 September 2010
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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