RE: Performance issues when deleting and reading on large table

2005-04-24 Thread mathias fatene
e' Subject: Re: Performance issues when deleting and reading on large table > > It's a probably a case of not having the cardinality of indexes right and > thus making wrong decisions for queries. > - Currently there is not a single query in the application that does not use > t

Re: Performance issues when deleting and reading on large table

2005-04-24 Thread Jigal van Hemert
> > It's a probably a case of not having the cardinality of indexes right and > thus making wrong decisions for queries. > - Currently there is not a single query in the application that does not use > the correct index. We only have key-reads. Wich would mean that MySQL is > creating these incorre

RE: Performance issues when deleting and reading on large table

2005-04-24 Thread mathias fatene
sql@lists.mysql.com Cc: 'Jigal van Hemert'; 'mathias fatene' Subject: RE: Performance issues when deleting and reading on large table Hi Jigal, Mathias, Thanks the time you took to reply to my issue's! I would like to clear out some things. > It's a probably a c

RE: Performance issues when deleting and reading on large table

2005-04-24 Thread Almar van Pel
Hi Jigal, Mathias, Thanks the time you took to reply to my issue's! I would like to clear out some things. > It's a probably a case of not having the cardinality of indexes right and thus making wrong decisions for queries. - Currently there is not a single query in the application that does n

RE: Performance issues when deleting and reading on large table

2005-04-24 Thread mathias fatene
k using or not of internal temporary tables, ... Mathias -Original Message- From: Jigal van Hemert [mailto:[EMAIL PROTECTED] Sent: dimanche 24 avril 2005 17:05 To: Almar van Pel; mysql@lists.mysql.com Subject: Re: Performance issues when deleting and reading on large table From: &quo

Re: Performance issues when deleting and reading on large table

2005-04-24 Thread Jigal van Hemert
From: "Almar van Pel" > After some time (sometimes a week sometimes a month) it appears that the > index of the table gets stuck. > It tries to read from the table but does not get response. This causes the > connectionqueue to fill up > and the load on the system increases dramatically. In other

Performance issues when deleting and reading on large table

2005-04-24 Thread Almar van Pel
Hi, I'm managing a large free website running on Linux, with MySQL 4.0.23 and has 2Gb memory. (PIV 2,6 Ghz) MySQL is configured to have 382M key-buffer. There are two problems I have, wich have to do with a large table. This table contains 5 million records and is the core of our application.