11
我想知道什麼是我的connection.pool_size的合理數字？它涉及哪些方面？一旦爲其定義大小，還需要知道如何測試應用程序。如何查找數據庫連接池的合理大小以及如何驗證它？
我的應用程序將由ATLAST 100用戶同時使用，它的數據庫中有超過20個表。我的數據庫是MySQL，至少有12個系統同時使用我的應用程序。如果您需要了解更多信息，請告訴我。
我也發現了以下內容，它有助於定義連接池大小，但仍然不確定合理的數字是多少。
Hibernate's own connection pooling algorithm is, however, quite rudimentary.
It is intended to help you get started and is not intended for use in a production
system, or even for performance testing. You should use a third party pool for
best performance and stability. Just replace the hibernate.connection.pool_size
property with connection pool specific settings. This will turn off Hibernate's
internal pool. For example, you might like to use c3p0.
connection.pool_size indicates the maximum number of pooled connections. So it is
better to keep it at a logical count. It depends on your application and DB how
much it can handle. 10 is a reasonable count that will typically used as it is
sufficient for most cases.
我HibernateUtil的是如下
import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;
public class HibernateUtil {
private static ServiceRegistry serviceRegistry;
private static final ThreadLocal<Session> threadLocal = new ThreadLocal();
private static SessionFactory sessionFactory;
private static SessionFactory configureSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure();
serviceRegistry = new
ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();
sessionFactory = configuration.buildSessionFactory(serviceRegistry);
return sessionFactory;
} catch (HibernateException e) {
System.out.append("** Exception in SessionFactory **");
e.printStackTrace();
}
return sessionFactory;
}
static {
try {
sessionFactory = configureSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
private HibernateUtil() {
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static Session getSession() throws HibernateException {
Session session = threadLocal.get();
if (session == null || !session.isOpen()) {
if (sessionFactory == null) {
rebuildSessionFactory();
}
session = (sessionFactory != null) ? sessionFactory.openSession() : null;
threadLocal.set(session);
}
return session;
}
public static void rebuildSessionFactory() {
try {
sessionFactory = configureSessionFactory();
} catch (Exception e) {
System.err.println("%%%% Error Creating SessionFactory %%%%");
e.printStackTrace();
}
}
public static void closeSession() throws HibernateException {
Session session = (Session) threadLocal.get();
threadLocal.set(null);
if (session != null) {
session.close();
}
}
}
您正在使用哪個數據庫，以及每次連接到數據庫的系統數量？ – Karthikeyan
@Karthikeyan問題被更新，12個系統同時使用它並且數據庫是mysql –