Re: Replication slot stats misgivings - Mailing list pgsql-hackers

From Masahiko Sawada
Subject Re: Replication slot stats misgivings
Date
Msg-id CAD21AoDqoQ42RdFj-bn2xDEajb7LvrUVq1grBTvdO+nAk5=jcQ@mail.gmail.com
Whole thread Raw
In response to Re: Replication slot stats misgivings  (Amit Kapila <amit.kapila16@gmail.com>)
Responses Re: Replication slot stats misgivings  (Amit Kapila <amit.kapila16@gmail.com>)
List pgsql-hackers
On Fri, Apr 23, 2021 at 6:15 PM Amit Kapila <amit.kapila16@gmail.com> wrote:
>
> On Mon, Apr 19, 2021 at 4:28 PM vignesh C <vignesh21@gmail.com> wrote:
> >
> > I have made the changes to update the replication statistics at
> > replication slot release. Please find the patch attached for the same.
> > Thoughts?
> >
>
> Thanks, the changes look mostly good to me. The slot stats need to be
> initialized in RestoreSlotFromDisk and ReplicationSlotCreate, not in
> StartupDecodingContext. Apart from that, I have moved the declaration
> of UpdateDecodingStats from slot.h back to logical.h. I have also
> added/edited a few comments. Please check and let me know what do you
> think of the attached?

The patch moves slot stats to the ReplicationSlot data that is on the
shared memory. If we have a space to store the statistics in the
shared memory can we simply accumulate the stats there and make them
persistent without using the stats collector? And I think there is
also a risk to increase shared memory when we want to add other
statistics in the future.

Regards,

-- 
Masahiko Sawada
EDB:  https://www.enterprisedb.com/



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