Re: [COMMITTERS] pgsql: Add TCP keepalive support to libpq.

On Thu, Jun 24, 2010 at 10:40 AM, Florian Pflug <fgp(at)phlo(dot)org> wrote:
> On Jun 24, 2010, at 16:30 , Robert Haas wrote:
>> On Thu, Jun 24, 2010 at 10:13 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>>> Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
>>>> There isn't any need at at all for this. We can already add options on
>>>> the libpq connection line.
>>>
>>>> options = '-o tcp_keepalives_idle=X
>>>> tcp_keepalives_interval=Y
>>>> tcp_keepalives_count=Z'
>>>
>>> Huh?  The above is 100% fanciful; there was no code in libpq or anywhere
>>> else that would have processed such a thing.
>>
>> You can do this:
>>
>> psql "host=127.0.0.1 options='-c tcp_keepalives_idle=1'"
>
> Hm, seems a bit error-prone though. The difference between the above
>
> psql "host=127.0.0.1 keepalives=1"
>
> isn't immediately obvious I'd say.
>
> Should we maybe rename the libpq-side parameters to tcp_client_keepalives, tcp_client_keepalives_idle, tcp_client_keepalives_count and tcp_client_keepalives_interval? Or do we expect people who fiddle with those parameters to understand the subtle difference?

I think the existing names are fine - people should understand that
"options" means "server-side options" and that anything else is a
client-side option. However, if there's a strong consensus the other
way and someone feels like working up a patch, that's fine too.

--
Robert Haas
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