[GENERAL] Query planning

2014-10-31 Thread Jayadevan M
Hi all, I am going through PostgreSQL documentation on how row estimation is done in PostgreSQL. http://www.postgresql.org/docs/current/static/row-estimation-examples.html There is a reference to cardinality (rel_cardinality) there. But that is an estimate of the number of rows in the table,

Re: [GENERAL] Query planning

2014-10-31 Thread Emanuel Calvo
El 31/10/14 a las 04:46, Jayadevan M escibiĆ³: Hi all, I am going through PostgreSQL documentation on how row estimation is done in PostgreSQL. http://www.postgresql.org/docs/current/static/row-estimation-examples.html There is a reference to cardinality (rel_cardinality) there. But that is

[GENERAL] Query planning configuration and solid state drives

2008-05-30 Thread Clodoaldo
What should be changed in the query planning configuration, if at all, if a ultrafast solid state drive would be used to host a whole database ? Specially if used in Raid 0 configurations. Regards, Clodoaldo Pinto Neto -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To

Re: [GENERAL] Query planning configuration and solid state drives

2008-05-30 Thread Merlin Moncure
On Fri, May 30, 2008 at 11:43 AM, Clodoaldo [EMAIL PROTECTED] wrote: What should be changed in the query planning configuration, if at all, if a ultrafast solid state drive would be used to host a whole database ? Specially if used in Raid 0 configurations. random_page_cost can probably be

Re: [GENERAL] Query planning configuration and solid state drives

2008-05-30 Thread Scott Marlowe
On Fri, May 30, 2008 at 9:43 AM, Clodoaldo [EMAIL PROTECTED] wrote: What should be changed in the query planning configuration, if at all, if a ultrafast solid state drive would be used to host a whole database ? Specially if used in Raid 0 configurations. Well, random page cost should be

Re: [GENERAL] Query planning configuration and solid state drives

2008-05-30 Thread Merlin Moncure
On Fri, May 30, 2008 at 2:55 PM, Clodoaldo [EMAIL PROTECTED] wrote: 2008/5/30 Merlin Moncure [EMAIL PROTECTED]: On Fri, May 30, 2008 at 11:43 AM, Clodoaldo [EMAIL PROTECTED] wrote: What should be changed in the query planning configuration, if at all, if a ultrafast solid state drive would be

Re: [GENERAL] Query planning configuration and solid state drives

2008-05-30 Thread Clodoaldo
2008/5/30 Merlin Moncure [EMAIL PROTECTED]: On Fri, May 30, 2008 at 11:43 AM, Clodoaldo [EMAIL PROTECTED] wrote: What should be changed in the query planning configuration, if at all, if a ultrafast solid state drive would be used to host a whole database ? Specially if used in Raid 0