Re: Introduce XID age and inactive timeout based replication slot invalidation

Hi Nisha.

Thanks for the v55* patches.

I have no comments for patch v55-0001.

I have only 1 comment for patch v55-0002 regarding some remaining
nitpicks (below) about the consistency of phrases.

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I scanned again over all the phrases for consistency:

CURRENT PATCH:

Docs (idle_replication_slot_timeout): Invalidate replication slots
that are idle for longer than this amount of time
Docs (idle_timeout): means that the slot has remained idle longer than
the duration specified by the idle_replication_slot_timeout parameter.

Code (guc var comment):  Invalidate replication slots idle longer than this time
Code (guc_tables): Sets the time limit for how long a replication slot
can remain idle before it is invalidated.

Msg (errdetail): This slot has been invalidated because it has
remained idle longer than the configured \"%s\" time.
Msg (errdetail): The slot has been inactive since %s and has remained
idle longer than the configured \"%s\" time.

~

NITPICKS:

nit -- There are still some variations "amount of time" versus "time"
versus "duration".  I think the term "duration" best describe the
maing so we can use that everywhere.

nit - Should consistently say "remained idle" instead of just "idle"
or "are idle",

nit - The last errdetail is also rearranged a bit because IMO we don't
need to say inactive and idle in the same sentence.

nit - Just say "longer than" instead of sometimes saying "for longer than"

~

SUGGESTIONS:

Docs (idle_replication_slot_timeout): Invalidate replication slots
that have remained idle longer than this duration.
Docs (idle_timeout): means that the slot has remained idle longer than
the configured idle_replication_slot_timeout duration.

Code (guc var comment):  Invalidate replication slots that have
remained idle longer than this duration.
Code (guc_tables): Sets the duration a replication slot can remain
idle before it is invalidated.

Msg (errdetail): This slot has been invalidated because it has
remained idle longer than the configured \"%s\" duration.
Msg (errdetail): The slot has remained idle since %s, which is longer
than the configured \"%s\" duration.

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Kind Regards,
Peter Smith.
Fujitsu Australia