Determine which queries eat most cumulative time

Rails
1

I’m looking for a way to find the cumulative time taken by database
queries. In other words, I’m trying to find out which queries have the
biggest overall impact on application performance.

I need an approach that works with ActiveRecord 2.1.2 and MySQL 5.1. I
have no qualms hacking into ARec myself, but I’d prefer an existing
solution if one exists.

Michael

–
Michael S.
mailto:[email protected]
http://www.schuerig.de/michael/

2

On Nov 23, 12:24pm, Michael S. [email protected] wrote:

I’m looking for a way to find the cumulative time taken by database
queries. In other words, I’m trying to find out which queries have the
biggest overall impact on application performance.

I need an approach that works with ActiveRecord 2.1.2 and MySQL 5.1. I
have no qualms hacking into ARec myself, but I’d prefer an existing
solution if one exists.

If you set the slow query log time to 0 then there are various tools
that will analyze your queries for you eg
http://www.maatkit.org/doc/mk-query-digest.html
or
http://www.mysqlperformanceblog.com/2006/09/06/slow-query-log-analyzes-tools/
(this will obviously dump a lot of data to your slow query log so you
don’t want this running 24/7)

Fred

3

On Tuesday 23 November 2010, Frederick C. wrote:

that will analyze your queries for you eg
http://www.maatkit.org/doc/mk-query-digest.html or
http://www.mysqlperformanceblog.com/2006/09/06/slow-query-log-analyz
es-tools/ (this will obviously dump a lot of data to your slow query
log so you don’t want this running 24/7)

Thanks. mk-query-digest with full logging is the best option, AFAICT.

Michael

–
Michael S.
mailto:[email protected]
http://www.schuerig.de/michael/