From: Simon Riggs on
On Sat, 2010-04-03 at 11:00 +0300, Peter Eisentraut wrote:
> The following messages from the postgres catalog either appear to be
> internal errors that should be marked differently, or they are in my
> estimation unintelligible to users and should be rephrased.

OK, will look.

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Simon Riggs www.2ndQuadrant.com


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From: Tom Lane on
Peter Eisentraut <peter_e(a)gmx.net> writes:
> The following messages from the postgres catalog either appear to be
> internal errors that should be marked differently, or they are in my
> estimation unintelligible to users and should be rephrased.

> #: commands/async.c:1424
> msgid "pg_notify queue is %.0f%% full"

This one is probably my responsibility (the others all look like Simon's
code). What do you not like about it, exactly? Perhaps it should be
"NOTIFY queue is x% full"?

regards, tom lane

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From: Robert Haas on
On Apr 3, 2010, at 11:13 AM, Tom Lane <tgl(a)sss.pgh.pa.us> wrote:

> Peter Eisentraut <peter_e(a)gmx.net> writes:
>> The following messages from the postgres catalog either appear to be
>> internal errors that should be marked differently, or they are in my
>> estimation unintelligible to users and should be rephrased.
>
>> #: commands/async.c:1424
>> msgid "pg_notify queue is %.0f%% full"
>
> This one is probably my responsibility (the others all look like
> Simon's
> code). What do you not like about it, exactly? Perhaps it should be
> "NOTIFY queue is x% full"?

I think maybe the question is why the user should care, or what they
are expected to do about it?

....Robert

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From: Joachim Wieland on
On Sat, Apr 3, 2010 at 9:02 PM, Robert Haas <robertmhaas(a)gmail.com> wrote:
> On Apr 3, 2010, at 11:13 AM, Tom Lane <tgl(a)sss.pgh.pa.us> wrote:
>> Peter Eisentraut <peter_e(a)gmx.net> writes:
>>> The following messages from the postgres catalog either appear to be
>>> internal errors that should be marked differently, or they are in my
>>> estimation unintelligible to users and should be rephrased.
>>
>>> #: commands/async.c:1424
>>> msgid "pg_notify queue is %.0f%% full"
>>
>> This one is probably my responsibility (the others all look like
>> Simon's
>> code).  What do you not like about it, exactly?  Perhaps it should be
>> "NOTIFY queue is x% full"?
>
> I think maybe the question is why the user should care, or what they
> are expected to do about it?

The user/administrator should make sure that all backends work through
the list of pending notifications. He does it by making sure that
there are no long-running or idle-in-transaction backends.

Actually there is more information given via errdetail and errhint:

ereport(WARNING,
(errmsg("pg_notify queue is %.0f%% full", fillDegree * 100),
(minPid != InvalidPid ?
errdetail("PID %d is among the slowest backends.", minPid)
: 0),
(minPid != InvalidPid ?
errhint("Cleanup can only proceed if this backend ends its current
transaction.")
: 0)));

Peter, if you consider the additional information given here, do you
still see an issue?


Joachim

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From: Tom Lane on
Robert Haas <robertmhaas(a)gmail.com> writes:
> On Apr 3, 2010, at 11:13 AM, Tom Lane <tgl(a)sss.pgh.pa.us> wrote:
>> What do you not like about it, exactly? Perhaps it should be
>> "NOTIFY queue is x% full"?

> I think maybe the question is why the user should care, or what they
> are expected to do about it?

The errdetail and errhint that go along with it will perhaps help to
answer that.

regards, tom lane

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