Re: Log size in bytes of query result

From: Sergei Kornilov <sk(at)zsrv(dot)org>
To: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, Franklin Haut <franklin(dot)haut(at)gmail(dot)com>, "pgsql-performance(at)lists(dot)postgresql(dot)org" <pgsql-performance(at)lists(dot)postgresql(dot)org>
Subject: Re: Log size in bytes of query result
Date: 2019-05-10 16:42:18
Message-ID: 13414871557506538@sas1-4b7566131ec9.qloud-c.yandex.net
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Hi

> extension that hooks into PostgreSQL

We have any hooks that can be used for such purposes?
Sometimes I think how to implement counters "bytes sent to client"/"bytes recv from client" in pg_stat_statements but did not found good place. Where we can accumulate such counters and how they can be accessible from extension? Extend DestReceiver or add counter directly in src/backend/libpq/pqcomm.c ?

PS: some returned with feedback old patch: https://www.postgresql.org/message-id/flat/CAHhq2wJXRqTMJXZwMAOdtQOkxSKxg_aMxxofhvCo%3DRGXvh0AUg%40mail.gmail.com

regards, Sergei

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