Hi Nick, Thank you for the response. You mentioned that database connection pool is created according to demand. What does that mean? Does it mean if there are more users it will open more connection thus create more connection pool?
Thanks heaps in advance. Kind regards, Joshua On Sep 6, 4:32 am, Nick Sieger <[email protected]> wrote: > On Sun, Sep 5, 2010 at 8:57 AM, Joshua Partogi <[email protected]> > wrote: > > Hi all, > > > I am interested to learn more about connection pooling in rails. Is there > > any good articles about this? I want to know specifically how is connection > > pooling in rails works. Does rails open one connection to the database for > > every user that is connected or does every user share the same database > > connection? Does different app server handles connection pooling differently > > [i.e passenger, unicorn, mongrel, thin] ? Or does app server doesn't really > > care about this? > > > Thank you very much in advance for your help and insights. > > Hi Joshua, > > Here are some facts about connection pooling that should answer your > questions: > > * Connection pooling is handled inside of ActiveRecord, so all > application servers should behave basically the same. > > * The database connection pool starts out empty and creates > connections over time according to demand. The maximum size of this > pool defaults to 5 and is configured in database.yml. > > * Requests and users share connections from this pool. A request > checks out a connection the first time it needs to access the database > and then checks the connection back in at the end of the request. > > * If you use Rails.threadsafe! mode, then multiple threads might be > accessing multiple connections at the same time, so depending on the > request load you might have multiple threads contending for a few > connections. > > /Nick -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
