Re: help wit query optimization (cont'd)

2008-01-09 Thread Sebastian Mendel
Perrin Harkins schrieb: On Jan 4, 2008 5:51 PM, Eben [EMAIL PROTECTED] wrote: The resultset is paginated on the front end using the SQL_CALC_FOUND_ROWS functionality... Usually a bad idea: http://www.mysqlperformanceblog.com/2007/08/28/to-sql_calc_found_rows-or-not-to-sql_calc_found_rows/

Re: help wit query optimization (cont'd)

2008-01-09 Thread Perrin Harkins
On Jan 9, 2008 4:33 AM, Sebastian Mendel [EMAIL PROTECTED] wrote: usually ... but i do not know of any index capable of having FULLTEXT and 'normal' fields in one index Does that matter? It would have to be doing a full scan for SQL_CALC_FOUND_ROWS to work out well. - Perrin -- MySQL

Re: help wit query optimization (cont'd)

2008-01-09 Thread Sebastian Mendel
Perrin Harkins schrieb: On Jan 9, 2008 4:33 AM, Sebastian Mendel [EMAIL PROTECTED] wrote: usually ... but i do not know of any index capable of having FULLTEXT and 'normal' fields in one index Does that matter? yes, as written in the mentioned article the test is only relevant with correct

Re: help wit query optimization (cont'd)

2008-01-09 Thread Perrin Harkins
On Jan 9, 2008 8:34 AM, Sebastian Mendel [EMAIL PROTECTED] wrote: yes, as written in the mentioned article the test is only relevant with correct used indexes, but MySQL does not use more than one index, so this query cannot all be done with indexes Well, first of all, MySQL 5 does use more

help wit query optimization (cont'd)

2008-01-04 Thread Eben
I left something out, the query looks like: SELECT SQL_CALC_FOUND_ROWS table_1.id,table_2.* FROM table_2 LEFT JOIN table_1 ON table_2.shared_id = table_1.shared_id WHERE MATCH table_2.field AGAINST ('value') AND table_2.current = 1 AND table_2.shared_id IN (SELECT shared_id FROM table_1_view)

Re: help wit query optimization (cont'd)

2008-01-04 Thread Perrin Harkins
On Jan 4, 2008 5:51 PM, Eben [EMAIL PROTECTED] wrote: The resultset is paginated on the front end using the SQL_CALC_FOUND_ROWS functionality... Usually a bad idea: http://www.mysqlperformanceblog.com/2007/08/28/to-sql_calc_found_rows-or-not-to-sql_calc_found_rows/ - Perrin -- MySQL General

Re: help wit query optimization (cont'd)

2008-01-04 Thread Moon's Father
I've never used this feature before on my application. On Jan 5, 2008 7:06 AM, Perrin Harkins [EMAIL PROTECTED] wrote: On Jan 4, 2008 5:51 PM, Eben [EMAIL PROTECTED] wrote: The resultset is paginated on the front end using the SQL_CALC_FOUND_ROWS functionality... Usually a bad idea: