On Tue, 15 Jun 2004 23:04:04 -0500, you wrote: > Hi. We are using SQLite to store and retrieve data rows where each >row is roughly 2K total in size and in a table of 15 columns. The total >size of the database ranges from 100-300 MB. > > The problem we are seeing is that query and insert performance is >unusually bad and scales up linearly with database size. Compared to MS >Access, the query times are several times slower. Frankly I was a bit >shocked at this considering that most people seem to think the >performance is good. However, I don't see anything that we are doing >wrong...we query the rows we want only by rowid. I'm very puzzled that >this hasn't come up a lot in my searches of the mailing list, but >perhaps the slower query times aren't a concern for many of the >applications using SQLite. > > Empirically speaking, we display our data in a scrolling 2 >dimensional grid format. With MS access, this grid responds >instantaneously when moving through the grid. With SQLite, there is >very noticable stalling and lag and the disk i/o is higher than MS >Access by roughly a factor of 10. > > I suppose I am looking to see if anyone is seeing the same results >that I am seeing, and wondering if this is known and expected to be the >case. The speed results on the website seem way off to me or must be so >skewed towards a small dataset that they do not apply in a real world >scenario. I would also like to state that I am very impressed with the >simplicity of SQLite, which is rare to find these days. It was very >easy to get up and running. I'm just having trouble getting past the >performance issues. Any explanation would be helpful. > >Richard Kuo
How do you fill in the grid control? Is it storing the data, or do you provide the data when requested? (owner data..) You may need to implement some caching if it isn't implemented already, I know some controls have this set up in them, and it could be that either access is taking advantage of this, or is caching it from w/in the DB itself.. Also, did you implement a integer primary key, and use indexing? Randall Fox --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
