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Re: Block-level CRC checks

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Block-level CRC checks
Date: 2008-10-29 20:51:02
Message-ID: 20081029205102.GM4331@alvh.no-ip.org (view raw or flat)
Thread:
Lists: pgsql-hackers
Alvaro Herrera wrote:

> 3. the bgwriter is seen writing WAL entries at checkpoint.  At shutdown,
> this might cause an error to be reported on how there was not supposed
> to be activity on the log.  I didn't save the exact error report and I
> can't find it in the source :-(

LOG:  received fast shutdown request
LOG:  aborting any active transactions
FATAL:  terminating connection due to administrator command
LOG:  autovacuum launcher shutting down
LOG:  shutting down
LOG:  INSERT @ 0/67F05F0: prev 0/67F05C0; xid 0: Heap2 - hintbits: rel 1663/16384/1259; blk 4
CONTEXT:  writing block 4 of relation 1663/16384/1259
LOG:  xlog flush request 0/67F06C0; write 0/0; flush 0/0
CONTEXT:  writing block 4 of relation 1663/16384/1259
LOG:  INSERT @ 0/67F06C0: prev 0/67F05F0; xid 0: Heap2 - hintbits: rel 1663/16384/2608; blk 40
CONTEXT:  writing block 40 of relation 1663/16384/2608
LOG:  xlog flush request 0/67F0708; write 0/67F06C0; flush 0/67F06C0
CONTEXT:  writing block 40 of relation 1663/16384/2608
LOG:  INSERT @ 0/67F0708: prev 0/67F06C0; xid 0: Heap2 - hintbits: rel 1663/16384/1249; blk 29
CONTEXT:  writing block 29 of relation 1663/16384/1249
LOG:  xlog flush request 0/67F0808; write 0/67F0708; flush 0/67F0708
CONTEXT:  writing block 29 of relation 1663/16384/1249
LOG:  INSERT @ 0/67F0808: prev 0/67F0708; xid 0: XLOG - checkpoint: redo 0/67F05F0; tli 1; xid 0/9093; oid 90132; multi 1; offset 0; shutdown
LOG:  xlog flush request 0/67F0850; write 0/67F0808; flush 0/67F0808
PANIC:  concurrent transaction log activity while database system is shutting down
LOG:  background writer process (PID 17411) was terminated by signal 6: Aborted

I am completely at a loss what to do here.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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