From: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com> |
---|---|
To: | Andres Freund <andres(at)2ndquadrant(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
Cc: | Kyotaro HORIGUCHI <horiguchi(dot)kyotaro(at)lab(dot)ntt(dot)co(dot)jp>, <robertmhaas(at)gmail(dot)com>, <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Escaping from blocked send() reprised. |
Date: | 2014-09-03 12:09:54 |
Message-ID: | 54070512.9010807@vmware.com |
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Lists: | pgsql-hackers |
On 09/03/2014 12:23 AM, Andres Freund wrote:
> On 2014-09-02 17:21:03 -0400, Tom Lane wrote:
>> Heikki Linnakangas <hlinnakangas(at)vmware(dot)com> writes:
>>> I was going to suggest using WaitLatchOrSocket instead of sleeping in 1
>>> second increment, but I see that WaitLatchOrSocket() doesn't currently
>>> support waiting for a socket to become writeable, without also waiting
>>> for it to become readable. I wonder how difficult it would be to lift
>>> that restriction.
>>
>> My recollection is that there was a reason for that, but I don't recall
>> details any more.
>
> http://git.postgresql.org/pg/commitdiff/e42a21b9e6c9b9e6346a34b62628d48ff2fc6ddf
>
> In my prototype I've changed the API that errors set both
> READABLE/WRITABLE. Seems to work....
Andres, would you mind posting the WIP patch you have? That could be a
better foundation for this patch.
- Heikki
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