Win32 Backend Cash - pre-existing shared memory block is still in use

I'm getting infrequent backend crashes on a windows instance of PostgreSQL. The error I get is in the log below. It
seemsto relate to the share memory each time. Does anyone have any ideas what the problem is here, or what additional
thingsI can do to get more information out next time the backend crashes? 

I'm running PostgreSQL 8.4.4 on Windows server 2003 Standard.

Much Appreciated,
Jeremy


Postgresql.log:

2010-08-17 16:57:22 NZSTLOG:  unexpected EOF on client connection
TopMemoryContext: 268428304 total in 26 blocks; 5528 free (22 chunks); 268422776 used
  Local Buffer Lookup Table: 2088960 total in 8 blocks; 501416 free (22 chunks); 1587544 used
  PostGIS PROJ4 Backend projPJ MemoryContext Hash: 8192 total in 1 blocks; 5384 free (0 chunks); 2808 used
  PL/PgSQL function context: 57344 total in 3 blocks; 22264 free (16 chunks); 35080 used
  PL/PgSQL function context: 57344 total in 3 blocks; 28696 free (27 chunks); 28648 used
  PLpgSQL function cache: 24328 total in 2 blocks; 5904 free (0 chunks); 18424 used
  CFuncHash: 8192 total in 1 blocks; 4936 free (0 chunks); 3256 used
  Type information cache: 8192 total in 1 blocks; 1800 free (0 chunks); 6392 used
  Operator lookup cache: 24576 total in 2 blocks; 14072 free (6 chunks); 10504 used
  Operator class cache: 8192 total in 1 blocks; 3848 free (0 chunks); 4344 used
  TopTransactionContext: 24576 total in 2 blocks; 9768 free (8 chunks); 14808 used
    ExecutorState: 253952 total in 5 blocks; 83656 free (9 chunks); 170296 used
    Combo CIDs: 8192 total in 1 blocks; 4936 free (0 chunks); 3256 used
  MessageContext: 253952 total in 5 blocks; 125592 free (1175 chunks); 128360 used
  smgr relation table: 24576 total in 2 blocks; 15072 free (4 chunks); 9504 used
  TransactionAbortContext: 32768 total in 1 blocks; 32752 free (0 chunks); 16 used
  Portal hash: 8192 total in 1 blocks; 3912 free (0 chunks); 4280 used
  PortalMemory: 8192 total in 1 blocks; 8040 free (0 chunks); 152 used
    PortalHeapMemory: 1024 total in 1 blocks; 936 free (0 chunks); 88 used
      ExecutorState: 2097192 total in 9 blocks; 1996680 free (1470 chunks); 100512 used
2010-08-17 19:19:32 NZSTLOG:  server process (PID 6684) exited with exit code 128
2010-08-17 19:19:32 NZSTLOG:  terminating any other active server processes
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTWARNING:  terminating connection because of crash of another server process
2010-08-17 19:19:32 NZSTDETAIL:  The postmaster has commanded this server process to roll back the current transaction
andexit, because another server process exited abnormally and possibly corrupted shared memory. 
2010-08-17 19:19:32 NZSTHINT:  In a moment you should be able to reconnect to the database and repeat your command.
2010-08-17 19:19:32 NZSTLOG:  all server processes terminated; reinitializing
2010-08-17 19:19:42 NZSTFATAL:  pre-existing shared memory block is still in use
2010-08-17 19:19:42 NZSTHINT:  Check if there are any old server processes still running, and terminate them.

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