8 | Left join fetch behaviour doesn't retrieve children? where is the issue. Yes, without index on the collection, all if fine, but performances are weak. Xirt xirt ... forum thread. Well ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah ... . So my performance issue in my application is more due to that problem than the left join one. ( Note |
7 | Mapped By Fetch is very SlowWell ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah ... , go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch. So my performance issue ... : Removing mapped-by can still improve performance because there is no need in this additional query |
7 | On ensuring ID available after persist it did. Performing em.flush() immediately after em.persist(e) seems to work (although I'm not sure about the performance hit of flushing every time). This can be encapsulated as a wrapping persist ... ) is performance considerations. Allocating IDs requires a round trip to the server. By postponing ID |
7 | Selective merge/cascade of detatched entity anything' flag, then to perform the modification, and for things that change after the re-attach happens ... /jpa/tool/enhancer#Load_Time_Java_Agent_Enhancement_ This improved performance by between 5-30%, but this is still significantly slower than I'd hoped. I performed printlns at stages in the above code |
7 | virtual servers and one file), there is a massive drop in performance. We have already seen that queries take more than 20 seconds ... of this? We are not aware of this issue (no previous reports). A drop in performance from a few milliseconds ... database but the virtualization space is limited then obviously this can cause a performance drop |
7 | OEM: Too many persistable types (>10) - exceeds evaluation limit (error 1011) has indeed been performed. I have this at the entry to my application: public static void main ... ) System.out.format("ObjectDB class enhancing HAS been " + "performed."); else System.out.format("ERROR! ObjectDB class enhancing has NOT been performed."); // todo end ... I |
7 | Enhancement Check instanceof com.objectdb.spi.SignedType support Support Hello, thank you for the hint, it performs ... to the ObjectDB log file when the exception is thrown. support Support The logging performs, thanks ... .7.6_05 fixes the issue! The remaining problems were fixed by performing a proper build |
7 | Optimization Question which rewriting from scratch might be faster. You may also consider improving performance by: Using more embedded ... (and if you can use one transaction for deletion of many updates it can also improve performance ... that has just been released (2.0 RC3) improves performance of insert/update/delete operations |
1 | ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection, open in NetBeans8.1, perform Clean and Build, and Run: https://www.webel.com.au/downloads/objectdb ... other errors (and to benefit from other fixes you have performed). webel Dr Darren Kelly I appreciate ... Unpack, open in NetBeans8.1, and then perform Build. There is an Ant script with post-compile |
1 | each 1-2 days objects on some objectdb level lock/block each other one more sequence (system not more performing) hgzwicker Hans-Georg Zwicker we increased the cores to 24 ... % and around 50 threads. When we have the performance issue we are at 80% and around 200 threads hgzwicker Hans ... . The next 5 thread dumps have been taken at 7:54. Did the system return to normal performance between 7 |
