| From: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
|---|---|
| To: | Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Timur Luchkin <timur(dot)luchkin(at)gmail(dot)com>, PostgreSQL Bugs <pgsql-bugs(at)postgresql(dot)org> |
| Subject: | Re: Too slow "Analyze" for the table with data in Thai language |
| Date: | 2016-07-06 01:32:32 |
| Message-ID: | CAEepm=21_hqfKo6YBOq0p2hwy54D91fjJNf029RawaqEA=TjUw@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Wed, Jul 6, 2016 at 11:52 AM, Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
> On Tue, Jul 5, 2016 at 8:33 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>> So ... why do you think this is a Postgres bug and not a glibc bug?
>> We have no control over what happens inside strcoll().
>
> I'd be interested in seeing exactly where time is spent by glibc.
> Perhaps Timur can use perf to show us a profile using the default perf
> event type:
>
> https://wiki.postgresql.org/wiki/Profiling_with_perf
I wonder if it is this bug:
https://sourceware.org/bugzilla/show_bug.cgi?id=18441
Some possibly relevant mailing list traffic that highlights Thai:
https://sourceware.org/ml/libc-alpha/2015-10/msg00149.html
https://sourceware.org/ml/libc-alpha/2016-03/msg00699.html
--
Thomas Munro
http://www.enterprisedb.com
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