Re: Patch: show relation and tuple infos of a lock to acquire

Hi,

On 11/03/14 13:23, Amit Kapila wrote:
> [… snip …]
> So I think it's better to leave logging it as you have done in
> patch.

Agreed.

> […]
> 2. Name new functions as  MultiXactIdWaitExtended()/XactLockTableWaitExtended()
> or MultiXactIdWaitEx()/XactLockTableWaitEx().
> You can find some other similar functions (ReadBufferExtended,
> relation_openrv_extended)
>
> 3. MultiXactIdWaitWithInfo()/XactLockTableWaitWithInfo()
>
> Earlier I found option 3 as a good choice, but now again thinking on
> it I am leaning towards option 2.

Changing it once again will only cause more work and won't do a big
difference. So I suggest sticking with the current function names.

> Today, again looking into it, I found that function
> heap_lock_updated_tuple_rec() is using SnapshotAny to fetch the tuple
> and I think for this case also it's not safe to Log the tuple.
>
> Could you please once check (if you are comfortable doing so) wherever
> this patch is passing tuple, whether it is okay to pass it based on visibility
> rules, else I will again verify it once.

I think I got all places, but it would be nice to have a confirmation.

> > [… policy regarding whitespaces …]
> The simple rule I follow is don't touch the code which has no relation
> to current patch.

OK. Thanks.

Best regards,

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 Christian Kruse               http://www.2ndQuadrant.com/
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