On Friday 13 February 2009 11:07:29 koranthala wrote: > Hi, > I am working on a Python application which does approximately > 1000 updates at a time every 3 seconds in a Sqlite File Database > using SqlAlchemy. On timing it in a 2GHz machine, I found that it > is taking ~1.01 seconds to do the same. > Is it possible to increase the speed of the same? My > application is quite a complex one, and taking 1 second for the > updates is slowing the overall performance considerably. > I checked Sqlite page - and they mention that 25000 text > UPDATEs with an index (which is what I am doing) takes 2.4 seconds > (this is Sqlite2 data - sqlite3 should be faster). I guess should > mean that 1000 text UPDATEs should take 0.1 seconds. > > The inserts I do is as follows: > BEGIN: > 2009-02-13 14:34:40,703 INFO sqlalchemy.engine.base.Engine.0x..10 > UPDATE data SET status=? WHERE data."index" = ? > 2009-02-13 14:34:40,703 INFO sqlalchemy.engine.base.Engine.0x..10 > ['True', 68762] > > ... > (1000) > ... > > COMMIT > > Please note that the SET values are constant and only index > changes. can u use ... where data.index in (...) ? or if not, ... where data.index == 1 or data.index == 2 or ... group them by say 10 or 20, and see how faster that is?
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