Here is my hibernate log for /community-list (page takes about 90 seconds to load); We have about 200 communities, 1200 collections, and 64,000 items. Unlike Ying, we essentially have one original bitstream per item, primarily pdf files. Redhat 7, Java 8, Tomcat 8.5, Postgresql 9.6.2; 32G Ram, 8 CPU This setup worked well with previous versions up to and including 5.8

I'm not trying to pile on, but hopefully some additional info will be helpful! 2018-02-22 13:52:05,871 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 372441 nanoseconds spent acquiring 1 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 233248 nanoseconds spent preparing 3 JDBC statements; 482887 nanoseconds spent executing 1 JDBC statements; 1985778 nanoseconds spent executing 2 JDBC batches; 3867293 nanoseconds spent performing 3 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 29762475 nanoseconds spent executing 2 flushes (flushing a total of 2 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:52:05,873 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 0 nanoseconds spent acquiring 0 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 0 nanoseconds spent preparing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 0 nanoseconds spent performing 0 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:52:16,450 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 440048 nanoseconds spent acquiring 1 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 273468 nanoseconds spent preparing 3 JDBC statements; 547508 nanoseconds spent executing 1 JDBC statements; 1702327 nanoseconds spent executing 2 JDBC batches; 3683682 nanoseconds spent performing 3 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 27298233 nanoseconds spent executing 2 flushes (flushing a total of 2 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:52:16,452 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 0 nanoseconds spent acquiring 0 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 0 nanoseconds spent preparing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 0 nanoseconds spent performing 0 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:52:27,121 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 429299 nanoseconds spent acquiring 1 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 236026 nanoseconds spent preparing 3 JDBC statements; 561023 nanoseconds spent executing 1 JDBC statements; 1029554 nanoseconds spent executing 2 JDBC batches; 3446462 nanoseconds spent performing 3 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 23575938 nanoseconds spent executing 2 flushes (flushing a total of 2 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:52:27,123 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 0 nanoseconds spent acquiring 0 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 0 nanoseconds spent preparing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 0 nanoseconds spent performing 0 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:52:37,220 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 2570171 nanoseconds spent acquiring 1 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 27121987 nanoseconds spent preparing 2831 JDBC statements; 641543786 nanoseconds spent executing 2831 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 1108158 nanoseconds spent performing 23 L2C puts; 892275 nanoseconds spent performing 13 L2C hits; 249809 nanoseconds spent performing 28 L2C misses; 58195179 nanoseconds spent executing 2 flushes (flushing a total of 10470 entities and 24994 collections); 185425636 nanoseconds spent executing 17 partial-flushes (flushing a total of 15132 entities and 15132 collections) } 2018-02-22 13:52:37,226 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 0 nanoseconds spent acquiring 0 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 0 nanoseconds spent preparing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 0 nanoseconds spent performing 0 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } 2018-02-22 13:54:36,355 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 267649 nanoseconds spent acquiring 1 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 45162338 nanoseconds spent preparing 4812 JDBC statements; 1756479486 nanoseconds spent executing 4812 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 36704624 nanoseconds spent performing 1411 L2C puts; 50803773 nanoseconds spent performing 5623 L2C hits; 14742351 nanoseconds spent performing 11243 L2C misses; 31181919 nanoseconds spent executing 2 flushes (flushing a total of 13504 entities and 25940 collections); 60069213452 nanoseconds spent executing 7045 partial-flushes (flushing a total of 37986752 entities and 37986752 collections) } 2018-02-22 13:54:36,358 INFO org.hibernate.engine.internal.StatisticalLoggingSessionEventListener @ Session Metrics { 0 nanoseconds spent acquiring 0 JDBC connections; 0 nanoseconds spent releasing 0 JDBC connections; 0 nanoseconds spent preparing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC statements; 0 nanoseconds spent executing 0 JDBC batches; 0 nanoseconds spent performing 0 L2C puts; 0 nanoseconds spent performing 0 L2C hits; 0 nanoseconds spent performing 0 L2C misses; 0 nanoseconds spent executing 0 flushes (flushing a total of 0 entities and 0 collections); 0 nanoseconds spent executing 0 partial-flushes (flushing a total of 0 entities and 0 collections) } -- You received this message because you are subscribed to the Google Groups "DSpace Technical Support" group. 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