| From: | Andrew Sackville-West <awest(at)janrain(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz>, pgsql-bugs(at)postgresql(dot)org, Paulo Tanimoto <paulo(at)janrain(dot)com> |
| Subject: | Re: regression, deadlock in high frequency single-row UPDATE |
| Date: | 2014-12-11 21:28:55 |
| Message-ID: | 20141211212855.GL22364@andrew-ThinkPad-X230 |
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| Thread: | |
| Lists: | pgsql-bugs |
On Thu, Dec 11, 2014 at 02:22:56PM -0300, Alvaro Herrera wrote:
> Alvaro Herrera wrote:
>
> > I'm going to experiment with that idea and see if it leads to a
> > solution. I tried the other idea yesterday (to keep the HW tuple lock
> > we acquire in heap_lock_tuple until heap_update is done) but aside from
> > being very complicated and bug-prone, it doesn't solve the problem
> > anyway.
>
> Here's a preliminary patch. It does solve the deadlock in my simplified
> test case. If Andrew can confirm that it fixes his original problem
> too, that'd be good.
We can try that. We don't currently build our own pg, so it'll take a
bit for us to get there. I'll report back with results.
A
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