Re: [HACKERS] Priorities for 6.6 - Mailing list pgsql-hackers

From Vadim Mikheev
Subject Re: [HACKERS] Priorities for 6.6
Date
Msg-id 375A6814.9A9BDA23@krs.ru
Whole thread Raw
In response to Re: [HACKERS] Priorities for 6.6  (Bruce Momjian <maillist@candle.pha.pa.us>)
Responses Re: [HACKERS] Priorities for 6.6
List pgsql-hackers
Bruce Momjian wrote:
> 
> > In short, if you load a bunch of tuples into a table, the first select
> > after the load can run a lot slower than you might expect, because it'll
> > be writing back most or all of the pages it touches.  But that penalty
> > doesn't affect every select, only the first one to scan a newly-written
> > tuple.
> 
> I have removed this from the TODO list:
> 
>         * Prevent fsync in SELECT-only queries

When selecting (i.e. - read-only) transaction commits,
it change pg_log - we obviously can avoid this!
No sense to store commit/abort status of read-only xactions!

Vadim


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