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 Post subject: Cascade operation performance tuning for Hibernate 5
PostPosted: Tue Nov 08, 2016 11:05 pm 
Newbie

Joined: Sat Oct 15, 2016 9:49 pm
Posts: 5
Hi,

I'm trying to track down a performance problem and profiling has led me to wonder what Cascade.cascade and CascadeAction.noCascade are doing. The application spends most of its time in these two methods. The application is only performing reads, so this seems counter intuitive to me.

I'm using hibernate 5.2.3 if that matters.

Thanks for any help.

Reid


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 Post subject: Re: Profiler shows most time spent in Cascade.cascade
PostPosted: Wed Nov 09, 2016 12:26 am 
Hibernate Team
Hibernate Team

Joined: Thu Sep 11, 2014 2:50 am
Posts: 1630
Location: Romania
For read-only transactions, you need to fetch read-only entities so that the dirty checking mechanism does not fire.

For example, if the current Session only needs to fetch read-only entities, yu can set this flag:

Code:
session.setReadOnly(true);


or use a query hint:

Code:
List<Post> posts = entityManager.createQuery(
    "select p from Post p", Post.class)
.setHint("org.hibernate.readOnly", true)
.getResultList();


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 Post subject: Re: Cascade operation performance tuning for Hibernate 5
PostPosted: Wed Nov 09, 2016 1:02 pm 
Newbie

Joined: Sat Oct 15, 2016 9:49 pm
Posts: 5
Thank you so much! I'll give it a try.

Edit: Yes, that really helped. Making the transaction read only improved the query time by over 20x!


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