if you read the entire document, it should be pretty clear that the engine does not function without a connection pool, so there has to be one present by default.
"The Engine will create its first connection to the database when a SQL statement is executed. As concurrent statements are executed, the underlying connection pool will grow to a default size of five connections, and will allow a default "overflow" of ten. Since the Engine is essentially "home base" for the connection pool, it follows that you should keep a single Engine per database established within an application, rather than creating a new one for each connection." "poolclass=None - a sqlalchemy.pool.Pool subclass that will be instantated in place of the default connection pool." "The close method on Connection does not actually remove the underlying connection to the database, but rather indicates that the underlying resources can be returned to the connection pool. When using the connect() method, the DBAPI connection referenced by the Connection object is not referenced anywhere else." On Mar 14, 2007, at 2:26 PM, vkuznet wrote: > > Hi, > it's not obvious, nothing said in a docs about default pool setup and > The Database options section has: > pool=None - an actual pool instance. > that's why I conclude that pool is NOT setup by default. I just want > to confirm that. > > Valentin. > > On Mar 14, 1:34 pm, Sébastien LELONG <[EMAIL PROTECTED] > securities.fr> wrote: >>> So that's why I'm confused. Does the pooling is turn on by >>> default or >>> not ? >> >> IIRC, a default pool is set according to the type of engine (eg. >> SingletonThreadPool for sqlite, QueuePool for MySQL, or the >> like...). So it's >> set by default, but you can of course override this with your own >> pool, as >> you described. >> >>> In this case when I invoke multiple times con=engine.connect(), does >>> the connection will be take from pool? If connection will timeout, >>> does pool guarantee to make a new one? >> >> Use pool_recycle parameter so prevent any timeout. >> >> Hope it helps. >> >> Cheers >> >> Seb >> -- >> Sébastien LELONG >> sebastien.lelong[at]sirloon.nethttp://www.sirloon.net > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
