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Backend process that won't die

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I have a couple of backend processes that are “stuck”, and do not respond to a pg_cancel_backend.  This is PostgreSQL 8.3.5.  The pg_cancel_backend returns true, but the process keeps running.  I have also done a “kill 12345” from the command-line, with no effect.

 

The processes are running a “select function_x” statement that normally takes a fraction of a second to run.

 

No locks are shown when I do:

select relname,pg_locks.* from pg_class,pg_locks where relfilenode=relation and not granted;

 

We had a database crash last week, and had to reindex a bunch of tables, but this function has been working for several days on the same tables that should be being used by the function_x function.

 

Any ideas on how to get the processes to go away?

 

They are eating cpu cycles, for no good reason:

postgres 28396 85.0  1.4 4420768 242224 ?      Ss   Sep03 3193:40 postgres: userxx dbname1 172.27.43.9(1160) SELECT

 

 

Thanks,

Susan

 

 

 


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