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Queries are slow on a large database

to get MAX/MIN values: SELECT MAX(m.id) FROM MessageImpl m or in JDOQL (with a single query string ... (MessageImpl.class); query.setResult ("min(this.Id), max(this.Id), count(this.Id)"); Object

Server connection management

? It would be useful to have configuration settings to control the connection pool (min/max connections

Soft Reference Object Cache Recommendation

option. I use the "generation one" garbage collection option and explicitly set the min and max heap

Memory Leak in EntityManagerFactory ?

()' but that doesn't change the issue (of course there are less entities because I testet only for 15 min). Arne

IN expression in a Criteria Query

value combination). Aggregate calculations (count, sum, avg, max, min) that are carried

"is not null" queries not working with index

Woraround doesn't work in combination with 'min': System.out.println("min not null: " + em.createQuery("SELECT min(p.bar) FROM Foo p WHERE p.bar >= 0 or p.bar <= 0").getSingleResult()); gives

javax.servlet.ServletException: Annotated methods must follow the JavaBeans naming convention. __odbHidden_getPropertyName

widthPxSideBarLeft = 250; @Min(150) @Max(400) public int getWidthPxSideBarLeft() { return widthPxSideBarLeft ... = widthPxSideBarLeft; } It appears in part of a JSF template with dynamic CSS style parameters: style="min-width

stress test -> com.objectdb.o.InternalException: null

of 100 MB, Tomee runs out of memory in ~20 minutes. With a heap of 512 MB, in around 240 min (4

Server out of memory exceptions

for about 15mins I get out of memory exceptions The test fails faster (in about 2 mins) if I enable another 5

Pessimistic lock timeout - blocks indefinitely

killed the test after a min or so). If I set the timeout to less than 1000ms the blocked threads

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Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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