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PONHibernate Slow Startup sometimes
 

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    <p>I´m using NHibernate 3 on a new desktop project. I've read about serialize the Configuration Object. I did it but, sometimes it didn´t work. I'm started to think that it´s working only when i start up the app (serialize the configuration object), then close it, and startup again (few seconds later). But if i wait some minutes it didn´t work. I´m talking about 45+ seconds. Other Strange thing if that this just happen on a few machines not all. Some work as expected slow the first time, but faster the nexts startups.</p> <p>Here is my configuration:</p> <p>the class that create the configuration and session factory</p> <pre><code>class NHibernateUnitOfWorkFactory : IUnitOfWorkFactory { public NHibernateUnitOfWorkFactory(string nhibernateConfigPath) { String serializablefilePath = "configuration.serialized"; try { if (IsConfigurationFileValid(serializablefilePath)) { Configuration = LoadConfigurationFromFile(serializablefilePath); } else { // configuration is immutable, store last returned value Configuration = new Configuration(); Configuration.Configure(nhibernateConfigPath); Configuration.AddAssembly(typeof(ObjectEntity).Assembly); SaveConfigurationToFile(serializablefilePath, Configuration); new SchemaUpdate(Configuration).Execute(true, true); } //NHibernateSchemaExport(); } catch (Exception ex) { throw new GenericRepositoryException( string.Format("Error while configuring NHibernate: {0}.", ex.Message) , ex ); } try { SessionFactory = Configuration.BuildSessionFactory(); } catch (Exception ex) { throw new GenericRepositoryException( string.Format("Error while building NH session factory: {0}.", ex.Message) , ex ); } } private Boolean IsConfigurationFileValid(String ConfigFile) { //return File.Exists(ConfigFile); var ass = typeof(ObjectEntity).Assembly; //Assembly.GetCallingAssembly(); if (ass.Location == null) return false; var configInfo = new FileInfo(ConfigFile); var assInfo = new FileInfo(ass.Location); if (configInfo.LastWriteTime &lt; assInfo.LastWriteTime) return false; return true; } private static void SaveConfigurationToFile(String ConfigFile, Configuration configuration) { var file = File.Open(ConfigFile, FileMode.Create); var bf = new BinaryFormatter(); bf.Serialize(file, configuration); file.Close(); } private static Configuration LoadConfigurationFromFile(String ConfigFile) { try { var file = File.Open(ConfigFile, FileMode.Open); var bf = new BinaryFormatter(); var config = bf.Deserialize(file) as Configuration; file.Close(); return config; } catch (Exception) { return null; } } protected ISessionFactory SessionFactory { get; private set; } protected Configuration Configuration { get; private set; } /// &lt;summary&gt; /// Generates table structure inside specified database. /// &lt;/summary&gt; public void NHibernateSchemaExport() { new SchemaExport(this.Configuration).Execute(false, true, false); } #region IUnitOfWorkFactory Members public IUnitOfWork BeginUnitOfWork() { return new NHibernateUnitOfWork(this.SessionFactory.OpenSession()); } public void EndUnitOfWork(IUnitOfWork unitOfWork) { var nhUnitOfWork = unitOfWork as NHibernateUnitOfWork; if (unitOfWork != null) { unitOfWork.Dispose(); unitOfWork = null; } } #endregion #region IDisposable Members public void Dispose() { if (this.SessionFactory != null) { (this.SessionFactory as IDisposable).Dispose(); this.SessionFactory = null; this.Configuration = null; } } #endregion } </code></pre> <p>xml configuration</p> <pre><code>&lt;hibernate-configuration xmlns="urn:nhibernate-configuration-2.2" &gt; &lt;reflection-optimizer use="true"/&gt; &lt;session-factory name="NHibernate.Test"&gt; &lt;property name="connection.driver_class"&gt;NHibernate.Driver.OracleClientDriver&lt;/property&gt; &lt;property name="connection.connection_string"&gt; User Id=xx; Password=xx; Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS= (PROTOCOL=TCP)(HOST=192.168.100.xx)(PORT=1521))) (CONNECT_DATA=(SERVICE_NAME=XE))); &lt;/property&gt; &lt;property name="show_sql"&gt;false&lt;/property&gt; &lt;property name="dialect"&gt;NHibernate.Dialect.Oracle10gDialect&lt;/property&gt; &lt;property name="query.substitutions"&gt;true 1, false 0, yes 'Y', no 'N'&lt;/property&gt; &lt;property name="proxyfactory.factory_class"&gt;NHibernate.ByteCode.LinFu.ProxyFactoryFactory, NHibernate.ByteCode.LinFu&lt;/property&gt; &lt;property name="cache.use_query_cache"&gt;false&lt;/property&gt; &lt;property name="cache.use_second_level_cache"&gt;false&lt;/property&gt; &lt;property name="cache.provider_class"&gt;org.hibernate.cache.NoCacheProvider&lt;/property&gt; &lt;/session-factory&gt; &lt;/hibernate-configuration&gt; </code></pre> <p>Any idea to improve the startup time? </p>
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    1. CO1) Could it be taking a while to connect to the database? 2) Is schema update taking a while to complete, if so is it database locks, database running slow, or long connection time?
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      1. USChris Chilvers
    2. CO@ChrisChilvers the problem is here: SessionFactory = Configuration.BuildSessionFactory();. Even with serialization, in my machine takes a lot of time, but sometimes (how i describe in the question). Then the connections are fast, everything os ok
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