openjpa-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Georgi Naplatanov <go...@oles.biz>
Subject Re: Uncommited objects and Select performance
Date Sun, 17 May 2009 13:17:15 GMT
Hello, Jan

may be EntityManager.flush() method will improve performance lets say on
100 inserts.

Best regards
Georgi

Jan Kotek wrote:
> Hi,
> I have performance problem with queries on uncommited data.
>
> I run huge import, with commit at each 10000 items. During import I
> make lot of selection queries (to protect data integrity), but they
> are very slow. With commit every 100 items, queries run lot of faster.
>
> Profiler told me that most of time is spend in dataobjects and
> enhancer methods (get double etc). I think OpenJPA is making linear
> scan on all uncommited items.
>
> I played with IgnoreChanges settings, but it does not seems to help.
> So my question is: can I speed up those selection queries?
>
> Thanks,
> Jan
>   


Mime
View raw message