On 05/11/12 18:39, AI Rumman wrote:
> Hi all,
>
> I am using Postrgesql 9.1
>
> I got a message in my log:
> ERROR: deadlock detected
> DETAIL: Process 20265 waits for ShareLock on transaction 27774015;
> blocked by process 20262.
> Process 20262 waits for ShareLock on transaction 27774018;
> blocked by process 20265.
> Process 20265: UPDATE t1 SET product_id = 1017966 WHERE
> ticketid = '2170501'
> Process 20262: UPDATE c1 SET deleted=1 WHERE id='2170501'
> HINT: See server log for query details.
> STATEMENT: UPDATE t1 SET product_id = 1017966 WHERE ticketid = '2170501'
>
> How may I get more information about this deadlock like which queries
> created it.
>
The error message shows which queries - your two UPDATEs. I'm guessing
either t1 or c1 are views and so refer to the same row with id "2710501".
--
Richard Huxton