my RMySQL connections are so SLOW
On Mon, 2003-05-05 at 09:56, Laurent Faisnel wrote:
Hi all, I'm using the latest RMySQL to send requests to a MySQL database (which is quite small for the time - let's say 20 tables with a total of 1000 rows), and this should be part of a whole decisionnal system. It produces results which are displayed on a website, and therefore I need fast results (the database being quite small, I think this must be possible !). Unfortunately, a simple request to the database, and R needs more than 10 seconds. Even dbListTables() takes a long while. Imagine the problem with more data ! Can I hope something better with RMySQL ? Did anyone have the same problem ? If RMySQL (or is it MySQL's fault ?) is so slow, I could replace MySQL with Postgres, but this would imply a lot of extra work. R is perhaps very slow anyway ? Any piece of advice ? Thanks. Laurent
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Hi Have you tried to run the sql statement in mysql to check if the problem is really in RMySQL ? MySQL databases can be very slow if you don't index the tables. Check http://www.mysql.com/documentation/mysql/bychapter/manual_MySQL_Optimisation.html#MySQL_indexes Regards EJ