Re: explanation of some configs

Greg Smith wrote:
> On Tue, 10 Feb 2009, justin wrote:
>
>> http://www.varlena.com/GeneralBits/Tidbits/annotated_conf_e.html
>> checkpoint_segments
>> Maximum distance between automatic WAL checkpoints, in log file
>> segments (each
>> segment is normally 16 megabytes).
>>
>> Increase these settings if your database has lots of large batch
>> writes to
>> decrease the frequency of checkpoints (and thus lower disk activity).
>> Decrease
>> them if you are short on disk space or your environment has a
>> significant risk
>> of unexpected power-outs, as any un-checkpointed transactions will
>> dropped on
>> restart.
>
> You mentioned getting to there via
> http://wiki.postgresql.org/wiki/Performance_Optimization
>
> You'll note that link is disclaimed with "older version of material
> covered in the GUC tour", and it's aimed at PostgreSQL 7.4. If you
> read the current version of that document at
> http://www.pgcon.org/2008/schedule/attachments/44_annotated_gucs_draft1.pdf
>
> you'll see that text you've noted is incorrect isn't there anymore.
>
> --
> * Greg Smith gsmith(at)gregsmith(dot)com http://www.gregsmith.com Baltimore, MD

Not to be overly nick picking where is the version called out that it
applies to. Stating Older version is vague

If this new version annotated config file is correct then I can add a
new page detailing out the the different annotated config for the
different versions to the wiki.