0
我有Postgres DB,7500行在客戶端表中,-Xmx8m。Hibernate ScrollableResultSet意外OutOfMemoryError
Query query = session.createQuery("select c from Client c");
ScrollableResults resultSet = query.setFetchSize(50).setCacheMode(CacheMode.IGNORE)
.scroll(ScrollMode.FORWARD_ONLY);
int i = 0;
while (resultSet.next()) {
Client client = (Client) resultSet.get(0);
System.out.println(client.getId());
i++;
if (i % 50 == 0) {
session.clear();
Thread.sleep(500);
}
}
session.clear();
resultSet.close();
當我運行我的應用程序,我得到這個: .... java.lang.OutOfMemoryError:GC開銷超過限制
然後我設置-Xmx1024m和運行jvisualvm和得到這個 -
爲什麼我得到了很多字符串?誰可以解釋爲什麼OutOfMemory發生?