Re[2]: Poor performance for SELECT from 50.000 records - MySQL PERFORMANCE TEST

2004-11-25 Thread Juleni
Hello Mark, Thanks for your short response. I have checked it again. I have restarted MySQL first. When I executed command select SQL_CALC_FOUND_ROWS BF_USER.LOGIN_NAME, BF_USER.EMAIL, BF_USER.ID, BF_USER.MODIFICATION_DATE, BF_USER.SUPER_USER, BF_USER.GUEST_ACCESS_ENABLED,

Re: Poor performance for SELECT from 50.000 records - MySQL PERFORMANCE TEST

2004-11-25 Thread Mark Matthews
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Juleni wrote: > Hello Brent, > >Thanks for your answer, I have try to use clause SQL_CALC_FOUND_ROWS > within my SELECT query (and I also didn't use SELECT COUNT(*) ... query). >But when I used SQL_CALC_FOUND_ROWS and then I retrieved number o

Re[2]: Poor performance for SELECT from 50.000 records - MySQL PERFORMANCE TEST

2004-11-25 Thread Juleni
Hello Brent, Thanks for your answer, I have try to use clause SQL_CALC_FOUND_ROWS within my SELECT query (and I also didn't use SELECT COUNT(*) ... query). But when I used SQL_CALC_FOUND_ROWS and then I retrieved number of all columns using SELECT FOUND_ROWS(), the performance was worse than

Re: Poor performance for SELECT from 50.000 records - MySQL PERFORMANCE TEST

2004-11-22 Thread Brent Baisley
First you are using two distinct queries where you should be using two "related". Specifically, add SQL_CALC_FOUND_ROWS to your first query that retrieves data, then issue a query to see how many rows you would have had if you hadn't specified a LIMIT: SELECT FOUND_ROWS() The second query sh

Poor performance for SELECT from 50.000 records - MySQL PERFORMANCE TEST

2004-11-22 Thread Julian Legeny
Hello, I have a problem with poor performance when I execute select from 50.000 records. I have a test that retrieve page by page (20 records per page) all data from a table. It means I'm executing 2500 selects in the cycle for retrieving each page and I'm retrieving also time duration of some o