| From: | Merlin Moncure <mmoncure(at)gmail(dot)com> |
|---|---|
| To: | Andrew Chernow <ac(at)esilo(dot)com> |
| Cc: | Greg Stark <gsstark(at)mit(dot)edu>, Robert Haas <robertmhaas(at)gmail(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Joachim Wieland <joe(at)mcknight(dot)de>, pgsql-hackers(at)postgresql(dot)org, Andrew Chernow <andrew(at)esilo(dot)com> |
| Subject: | Re: Listen / Notify rewrite |
| Date: | 2009-11-13 15:13:45 |
| Message-ID: | b42b73150911130713k23392553m6b4b17e64280693a@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Nov 13, 2009 at 10:00 AM, Andrew Chernow <ac(at)esilo(dot)com> wrote:
> I think the original OP was close. The structure can still be fixed length
> but maybe we can bump it to 8k (BLCKSZ)?
The problem with this (which I basically agree with) is that this will
greatly increase the size of the queue for all participants of this
feature if they use the payload or not. I think it boils down to
this: is there a reasonably effective way of making the payload
variable length (now or in the future)? If not, let's compromise and
maybe go with a larger size, maybe 256 or 512 bytes.
merlin
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