From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
---|---|
To: | Magnus Hagander <magnus(at)hagander(dot)net> |
Cc: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Euler Taveira de Oliveira <euler(at)timbira(dot)com>, Marko Kreen <markokr(at)gmail(dot)com>, Tollef Fog Heen <tollef(dot)fog(dot)heen(at)collabora(dot)co(dot)uk>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: TCP keepalive support for libpq |
Date: | 2010-06-22 16:43:00 |
Message-ID: | AANLkTik660MswsoZUR9Urtt3aWO5AVr5StpcUQXD1CNj@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On Tue, Jun 22, 2010 at 12:32 PM, Magnus Hagander <magnus(at)hagander(dot)net> wrote:
>> Which brings us to the question of portability. A quick search around
>> the Internet suggests that this is supported on recent versions of
>> Linux, Free/OpenBSD, AIX, and HP/UX, and it appears to work on my Mac
>> also. I'm not clear how long it's been implemented on each of these
>> platforms, though. With respect to Windows, it looks like there are
>> registry settings for all of these parameters, but I'm unclear whether
>> they can be set on a per-connection basis and what's required to make
>> this happen.
>
> I looked around quickly earlier when we chatted about this, and I
> think I found an API call to change them for a socket as well - but a
> Windows specific one, not the ones you'd find on Unix...
That, in itself, doesn't bother me, especially if you're willing to
write and test a patch that uses them.
What does bother me is the fact that we are engineering a critical
aspect of our system reliability around vendor-specific implementation
details of the TCP stack, and that if any version of any operating
system that we support (or ever wish to support in the future) fails
to have a reliable implementation of this feature AND configurable
knobs that we can tune to suit our needs, then we're screwed. Does
anyone want to argue that this is NOT a house of cards?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company
From | Date | Subject | |
---|---|---|---|
Next Message | Bruce Momjian | 2010-06-22 16:43:47 | Re: pg_upgrade issues |
Previous Message | Magnus Hagander | 2010-06-22 16:32:08 | Re: TCP keepalive support for libpq |