| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Joachim Wieland <joe(at)mcknight(dot)de>, Greg Smith <greg(at)2ndquadrant(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, "Florian G(dot) Pflug" <fgp(at)phlo(dot)org>, Josh Berkus <josh(at)agliodbs(dot)com>, pgsql-hackers(at)postgresql(dot)org, Arnaud Betremieux <arnaud(dot)betremieux(at)keyconsulting(dot)fr> |
| Subject: | Re: Listen / Notify - what to do when the queue is full |
| Date: | 2010-02-09 23:01:14 |
| Message-ID: | 1265756475.17112.27.camel@monkey-cat.sm.truviso.com |
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| Lists: | pgsql-hackers |
On Tue, 2010-02-09 at 16:51 -0500, Tom Lane wrote:
> Limiting NOTIFY payloads to 7-bit would definitely avoid the issue.
> The question is if that's more of a pain than a benefit.
I don't see any alternative. If one backend sends a NOTIFY payload that
contains a non-ASCII character, there's a risk that we won't be able to
deliver it to another backend with a client_encoding that can't
represent that character.
Also, just the fact that client_encoding can be changed at pretty much
any time is a potential problem, because it's difficult to know whether
a particular notification was sent using the old client_encoding or the
new one (because it's asynchronous).
Regards,
Jeff Davis
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