Re: reduce size of logs stored by buildfarm

From: Jacob Champion <jacob(dot)champion(at)enterprisedb(dot)com>
To: Álvaro Herrera <alvherre(at)kurilemu(dot)de>
Cc: Pg Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: reduce size of logs stored by buildfarm
Date: 2025-11-25 18:39:29
Message-ID: CAOYmi+mF9Mkwzd2cn+mW8JKx-fscJO_VPWchCW6shkZvC-OjYQ@mail.gmail.com
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On Tue, Nov 25, 2025 at 5:30 AM Álvaro Herrera <alvherre(at)kurilemu(dot)de> wrote:
> I also noticed that an oauth test file contains a couple MBs of a
> gigantic string of just 'x'. I suppose that will compress well (with
> gzip at least, the 2 MB file becomes 8 kB). Still, it's kinda
> ridiculous and useless to bloat a 67 kB file to 2 MB that way.

Sorry about that.

> 0003 does that by simply cutting the string short at 10k, which reduces
> the size of the log from 2 MB to some 86 kB. Maybe there are better
> ways to deal with this? Jacob?

Only thing I don't like about this is that the JSON you need for
debugging might be after the useless padding. Attached is a patch that
does things more surgically, tested against Python 3.6, and I'm
running it through the CI now.

Thanks,
--Jacob

Attachment Content-Type Size
truncate-JSON-logs.patch.txt text/plain 2.2 KB

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