Where can the interval be configured? BTW, ReloadFromJDBCDataModel works like a dream so far :)
On Wed, Jul 13, 2011 at 10:58 AM, Sean Owen <[email protected]> wrote: > Yes it reloads after a configurable interval, or on demand. > > Clearing the cache for a user ID only means that user's data is recomputed. > It's not bad to call this frequently per se... I suppose you want to let it > cache as much and for as long as is valid and acceptable to your app. > > Your bottleneck is no longer reading from the DB if you're having it load > into memory. > > On Wed, Jul 13, 2011 at 6:19 PM, Salil Apte <[email protected]> wrote: > >> Awesome, I will give ReloadFromJDBCDataModel a try. How does this >> particular data model update itself on database changes? Does it just >> happen periodically and if so, can this rate be change easily? >> >> Lastly, will calling clear(userId) on a recommender frequently be bad >> for performance? I'm assuming with such small data amounts that the >> actual recommendation algorithm is quite speedy and that the DB is >> really the big bottleneck? >> >> On Wed, Jul 13, 2011 at 2:11 AM, Sean Owen <[email protected]> wrote: >> > That's all correct, it reads a lot. But you can avoid a lot of it by >> using >> > caching wrappers. >> > You also don't need to dump to a file. Use ReloadFromJDBCDataModel. >> > >> > On Wed, Jul 13, 2011 at 9:57 AM, Vitali Mogilevsky >> > <[email protected]>wrote: >> > >> >> Hey, >> >> I got the same problem, of slowness while using MYSQL data model, after >> a >> >> small research and looking into mysql's query log, revealed that user - >> >> user >> >> recommendation just floods the database with thousands and thousands of >> >> requests. >> >> and thats on small database. >> >> for now Im dumbping the database into file, and using filedata model >> which >> >> works much faster >> >> >> >> >> > >> >
