| From: | Aleksander Alekseev <aleksander(at)timescale(dot)com> |
|---|---|
| To: | Anthonin Bonnefoy <anthonin(dot)bonnefoy(at)datadoghq(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Craig Ringer <craig(dot)ringer(at)enterprisedb(dot)com>, Nikita Malakhov <hukutoc(at)gmail(dot)com>, Jan Katins <jasc(at)gmx(dot)net>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Peter Smith <smithpb2250(at)gmail(dot)com>, Jelte Fennema-Nio <postgres(at)jeltef(dot)nl>, Shlok Kyal <shlok(dot)kyal(dot)oss(at)gmail(dot)com> |
| Subject: | Re: POC: Extension for adding distributed tracing - pg_tracing |
| Date: | 2024-03-15 14:10:03 |
| Message-ID: | CAJ7c6TPjTxTgqL1zYGjbU1Mwfx1zB3GqZghjNWa+GVtJ028giA@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi Anthonin,
> [...]
>
> The usual approach is to have pre-allocated memory. This must actually be written (zeroed usually) or it might be lazily allocated only on page fault. And it can't be copy on write memory allocated once in postmaster startup then inherited by fork.
>
> That imposes an overhead for every single postgres backend. So maybe there's a better solution.
It looks like the patch rotted a bit, see cfbot. Could you please
submit an updated version?
Best regards,
Aleksander Alekseev (wearing co-CFM hat)
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