[R] my RMySQL connections are so SLOW
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon May 5 11:32:34 CEST 2003
What exactly are you timing? For me running a query is instant.
Are you starting R for each query, for example? What OS and what hardware
are you using?
People have reported that RODBC is a lot faster than RMySQL for some tasks
involving large datasets.
On Mon, 5 May 2003, Laurent Faisnel wrote:
> 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 ?
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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