Re: Minimal logical decoding on standbys

On 07/16/2019 10:56 PM, Andres Freund wrote:
> Even after calling pg_logical_slot_get_changes() multiple times? What
> does
> SELECT * FROM pg_replication_slots; before and after multiple calls return?
>
> Does manually forcing a checkpoint with CHECKPOINT; first on the primary
> and then the standby "fix" the issue?
>
Yes,eventually it gets clean up -after firing multiple times get_changes
function or checkpoint or even both.
This same behavior we are able to see  on MASTER  -with or without patch.

but is this an old (existing) issue ?
>> b)pg_wal files are not recycling  and every time it is creating new files
>> after firing get_changes function
> I'm not sure what you mean by this. Are you saying that
> pg_logical_slot_get_changes() causes WAL to be written?

No, when i said - created new WAL files , i meant -after each pg_bench
run NOT after executing  get_changes.

--
regards,tushar
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