| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Peter Geoghegan <pg(at)heroku(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pg_stat_statements fingerprinting logic and ArrayExpr |
| Date: | 2013-12-10 22:38:20 |
| Message-ID: | 20131210223820.GB7730@awork2.anarazel.de |
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| Lists: | pgsql-hackers |
On 2013-12-10 14:30:36 -0800, Peter Geoghegan wrote:
> Did you really find pg_stat_statements to be almost useless in such
> situations? That seems worse than I thought.
It's very hard to see where you should spend efforts when every "logical
query" is split into hundreds of pg_stat_statement entries. Suddenly
it's important whether a certain counts of parameters are more frequent
than others because in the equally distributed cases they fall out of
p_s_s again pretty soon. I think that's probably a worse than average
case, but certainly not something only I could have the bad fortune of
looking at.
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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