| From: | Andrew Dunstan <andrew(dot)dunstan(at)2ndquadrant(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Robert Treat <rob(at)xzilla(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Nikolay Samokhvalov <samokhvalov(at)gmail(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz>, Bruce Momjian <bruce(at)momjian(dot)us>, Alexey Kondratov <a(dot)kondratov(at)postgrespro(dot)ru>, v(dot)makarov(at)postgrespro(dot)ru, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: [PATCH] Increase the maximum value track_activity_query_size |
| Date: | 2019-12-30 23:55:26 |
| Message-ID: | CAA8=A7-u0J9za-du2YwPwOObHq24Dv=WLr4MesiKQShRchp6NQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Dec 31, 2019 at 10:16 AM Andrew Dunstan
<andrew(dot)dunstan(at)2ndquadrant(dot)com> wrote:
>
> On Tue, Dec 31, 2019 at 9:38 AM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> >
> > This doesn't seem like a reason not to allow a higher limit, like a
> > megabyte or so, but I'm not sure that pushing it to the moon would be
> > wise.
> >
>
>
> Just to get a mental handle on the size of queries we might be
> allowing before truncation, I did some very rough arithmetic on what
> well known texts might fit in a megabyte. By my calculations you could
> fit about four Animal Farms or one Madame Bovary in about a megabyte.
> So I think that seems like more than enough :-). (My mind kinda
> explores at the thought of debugging a query as long as Animal Farm.)
>
Turns out my arithmetic was a bit off. Animal Farm is 90 kb, Madame
Bovary 678 Kb.
cheers
andrew
--
Andrew Dunstan https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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