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    <p>I have used Hibernate extensively in high-performance tasks, including batch insertion of millions of records. Your problem is not with Hibernate, but with the way you are using it.</p> <p>Above all, do not use Hibernate as a persistent state manager; use it as a thin layer above the raw SQL and you won't complain about performance.</p> <ol> <li>Always prefer <code>StatelessSession</code> (it works for everything you need except <code>save</code> operations)`;</li> <li>never use lazy fetching, use explicit joins for everythng;</li> <li>never fetch whole objects, use SELECT to fetch exactly what you need;</li> <li>fetch as much as possible in a single statement, avoid n+1 selects at all costs;</li> <li>for large result sets, never use <code>list</code>, use <code>iterate</code> or <code>scroll</code>.</li> </ol> <p>The list goes on, but this is what I have come up with at this moment.</p> <p>As far as your direct question, it depends on the application. If it is a Spring application, then you will certainly want to use its declarative transaction management. Basically, you just put a few lines of XML config and you'll have an open DataSource in your DAO code ready to be used, with no management on your part.</p> <p>If you are doing something more raw, then by all means use a connection pool library, such as the great BoneCP. You acquire connections from it and later return them to it, again with no explicit management.</p> <p>Lastly, if you really want a bare-bones, unsafe and non-scalable approach, then you can create connections directly from the JDBC driver. This approach is really only for schoolwork and it is not recommended even in the smallest of production-worthy projects.</p>
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    1. POconverting sessions in hibernate to plein JDBC connections
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    1. USMarko Topolnik
    1. USMarko Topolnik
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    1. CO+1 especially for #4.
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      1. USShivan Dragon
    2. COThanks Marko for the reply,but I am a beginner in the corporate world and its my TL's decision to convert back to plain JDBC. My database is not huge and it does not keep changing so that Hibernate or other ORMs are opted.I have almost replaced all the HQLs with SQLs and stuck with the sessions now.Please help.
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