11 | ObjectDB is opening too many sockets of increasing system limits. We are using Ubuntu 18.04.5 LTS and after some time it causes following ... created indefinitely (we are using up to 20), but the socket stays there for longer period of time ... get, why some times it openes 70 sockets at once, and if I tried same operation again with freshly |
11 | Connection performace after upgrade to objectdb 2 static void main(String[] args) { for (int i = 0; i < 5; i++) { long time ... : " + (System.currentTimeMillis() - time)); for (int j = 0; j < 5; j++) { time ... : " + (System.currentTimeMillis() - time)); pm.close(); } pmf.close |
11 | Performance in large transactions application, these uncommitted updates may have to be applied each time again and again, in order ... time: " + (System.currentTimeMillis() - startTime)); emf.close(); } public static void ... create time: " + (System.currentTimeMillis() - startTime)); emf.close(); } private |
2 | javax.persistence.Enumerated: public enum EmployeeStatus {FULL_TIME, PART_TIME, CONTRACT} public enum SalaryRate |
2 | Freeze during save connection timeout 74" - Thread t@74 java.lang.Thread.State: TIMED_WAITING at java.lang ... synchronizers: - None "Timer-1" - Thread t@27 java.lang.Thread.State: TIMED_WAITING ... .RolloverFileOutputStream" - Thread t@25 java.lang.Thread.State: TIMED_WAITING at java.lang |
2 | each 1-2 days objects on some objectdb level lock/block each other version doesn't look related, it may be simply the exact timing in which each thread dump was taken ... now urges to switch to another database. we try to agree on a bit more time, but the situation ... % usage in average it is probably higher on load (maybe reaching 100%?), and then in peak time |
2 | combined index not used of time remained when you copy directories with many files in Windows, which is very inaccurate ... list of candidate query plans. The following list shows the actual execution time of each query plan ... time you may be able to manually select the best query plans for these queries as a quick workaround |
2 | Best practise loading big data EmbeddedSystems We have scenarios in which we open up to lots of different Db files at the same time ... within this transaction, even if at some time the GC collects the unused entities. When reading further, the cache ... if their referenced objects are freed or that from time to time. the cache is cleaned up. Our scenario uses |
2 | java 8 LocalDateTime is not working in queryMy entity class has a field of type java.time.LocalDateTime. I'm able to persist entities and I'm ... : SELECT t FROM Test t Joe Joe Khan New Java 8 date/time types are not supported by JPA yet. support ... single top level class example (in this form), which shows how you can use Java 8 date/time using |
0 | setResultClass(cls) class Date; or one of the java.sql classes Date, Time, or Timestamp; or a user-defined class |
