| From: | Thom Brown <thom(at)linux(dot)com> |
|---|---|
| To: | Josh Berkus <josh(at)agliodbs(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Avoiding deadlocks ... |
| Date: | 2010-08-20 08:50:20 |
| Message-ID: | AANLkTin_yzA+FkzRbD6d2JoSGyJd==8JrtWPWXsEcfZa@mail.gmail.com |
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| Lists: | pgsql-hackers |
On 20 August 2010 09:39, Josh Berkus <josh(at)agliodbs(dot)com> wrote:
> On 8/19/10 3:51 PM, Josh Berkus wrote:
>> Kevin,
>>
>> This one is for you:
>>
>> Two sessions, in transaction:
>>
>> Process A Process B
>>
>> update session where id = X;
>> update order where orderid = 5;
>> update order where orderid = 5;
>> update order where orderid = 5;
>> ... deadlock error.
>
> Johto on IRC pointed out I left something out of the above: "session" is
> referenced in an FK by "orders", and session = X is related to orderid = 5.
>
I was wondering what that had to do with anything.
--
Thom Brown
Registered Linux user: #516935
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