[ http://issues.apache.org/jira/browse/DERBY-465?page=comments#action_12316609 ]
Peter Kovgan commented on DERBY-465: ------------------------------------ Hi Mike! Your comments and help are very important for me and it seems we are coming together to similar results. Thank you. 1. Right now I discovered lock timeout errors on PB on multi-user-write test and I'm planning provide more precise tests of PB and recheck PB read and write. 2. Also Commit() probably must be done on every transaction to minimize lock time in multi-user test 3. May be I also will check several debugging options in both DB to be sure results are right. After tests I'll send source code of multi-user test as well as description to clarify results. > Embedded Derby-PointBase comparison > ----------------------------------- > > Key: DERBY-465 > URL: http://issues.apache.org/jira/browse/DERBY-465 > Project: Derby > Type: Wish > Components: Test > Versions: 10.0.2.1, 10.0.2.0 > Environment: Windows Server 2003, 4 processors, summary CPU 3.00 Ghz, RAM 1 > Gb > Reporter: Peter Kovgan > Attachments: Benchmarks_info_independent.doc, DBOperations.java, > Multithreading-access read.doc, User.java, derby-optimization.doc, > derby-pb1.doc > > I have tested 4 major embedded DB. > I have found that major disadvantage of Derby is > 1)low insert speed and > 2)significant performance degradation in select, update, delete operation > speed starting from some table size. > PointBase in comparison has not such degradation. > It will be better if you improve your product. > Good luck and thank you. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
