tag:blogger.com,1999:blog-6877629428951398731.comments2024-01-09T09:02:40.935-08:00Java Persistence PerformanceJameshttp://www.blogger.com/profile/07275512393744882781noreply@blogger.comBlogger151125tag:blogger.com,1999:blog-6877629428951398731.post-89353204368521623912016-10-17T14:27:02.807-07:002016-10-17T14:27:02.807-07:00Externalizor is a new open source library which au...<a href="https://github.com/qwazr/externalizor" rel="nofollow">Externalizor</a> is a new open source library which automatically handles JAVA serialization thru the Externalizable interface. It also includes compression mechanisms for primitive array (based on snappy).<br />Anonymoushttps://www.blogger.com/profile/09091862543879791277noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-29351364933173424252016-10-17T14:25:24.875-07:002016-10-17T14:25:24.875-07:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/09091862543879791277noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-81919587510006730352016-09-11T21:56:31.594-07:002016-09-11T21:56:31.594-07:00This comment has been removed by the author.Phen24 Storehttps://www.blogger.com/profile/06380081603645741148noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-26560481866524522182016-09-11T21:55:02.664-07:002016-09-11T21:55:02.664-07:00This comment has been removed by the author.Phen24 Storehttps://www.blogger.com/profile/06380081603645741148noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-78529453087511305232016-07-21T00:17:12.413-07:002016-07-21T00:17:12.413-07:00Serialization is the process of writing complete s...Serialization is the process of writing complete state of java object into output stream, that stream can be file or byte array or stream associated with TCP/IP socket. Thanks for sharing this post on optimizing java serialization. <br /><br /><a href="http://www.jaintechnosoft.com/services/seo-internet-marketing" rel="nofollow">SEO Company in Bangalore</a> | <a href="http://www.jaintechnosoft.com/services/website-design-development" rel="nofollow">Web Developers in Bangalore</a>Karen Jainhttps://www.blogger.com/profile/13475330047520112724noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-31730261297612946262016-06-28T04:42:30.213-07:002016-06-28T04:42:30.213-07:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/18426999766295359729noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-83272876408974688512016-06-02T23:26:55.182-07:002016-06-02T23:26:55.182-07:00When the test without a cache is 15x more faster t...When the test without a cache is 15x more faster than with a cache, then the cache makes no sense!<br /><br />And the same proplems i've seen in many real time situations! In many times the internal caches of jpa providers are really horrible implemented and not really under control (open jpa from apache has the same problems with the cache control like hibernate)<br /><br />By the way, the most databases have their own cache and if i need a cache in java then i use eh-cache or something like this cause this is under my control.<br />Anonymoushttps://www.blogger.com/profile/13602680466933122828noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-76531986858167335272016-04-29T10:45:14.771-07:002016-04-29T10:45:14.771-07:00Thanks for the article, James. It seems like you c...Thanks for the article, James. It seems like you could use JPA to maximize data usage when accessing a database; could you apply this (or even use JPA) to create self-improving <a href="http://www.modernanalytics.com/predictive-scoring-models/" rel="nofollow">predictive scoring models</a>? Or any predictive modeling, really, it doesn't have to be lead scoring. Predictive modeling requires a lot of iterations and a language/platform that could dynamically write and rewrite data based on the previous output could be useful for setting up predictive models. Can JPA handle this?Anonymoushttps://www.blogger.com/profile/11561603166670223615noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-5218554395602358002016-04-29T09:58:30.948-07:002016-04-29T09:58:30.948-07:00Thanks for the article. Is there anyway concurrent...Thanks for the article. Is there anyway concurrent processing could be used (perhaps not in this context) for a type of <a href="http://www.modernanalytics.com/predictive-modeling-techniques/" rel="nofollow">predictive modeling technique</a>? I know most predictive modeling is written for custom applications, but I wonder if you could use JPA to make one.Anonymoushttps://www.blogger.com/profile/11561603166670223615noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-26197935736914356052016-04-04T00:21:48.108-07:002016-04-04T00:21:48.108-07:00Great to read, thanks alotGreat to read, thanks alotjaydatthttps://www.blogger.com/profile/11213885138274400418noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-11018491124386208622016-03-07T11:26:07.419-08:002016-03-07T11:26:07.419-08:00Thanks for the post James. Any thoughts on what th...Thanks for the post James. Any thoughts on what the <a href="http://www.modernanalytics.com/enterprise-data-model-examples/" rel="nofollow">data model benefits</a> would be if you scaled this method up for an enterprise-sized database?Anonymoushttps://www.blogger.com/profile/01013321460318408995noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-45811077808067914432016-02-08T16:51:12.027-08:002016-02-08T16:51:12.027-08:00Where is this new query cache behavior in 2.5 docu...Where is this new query cache behavior in 2.5 documented? How does it treat deleted or modified entities? Thanks.Bob Fosterhttps://www.blogger.com/profile/03976384333510572229noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-11092024658995529102016-02-08T00:26:09.249-08:002016-02-08T00:26:09.249-08:00Is it possible to index on multi-columns : foreign...Is it possible to index on multi-columns : foreign key + basic column or foreign key + foreign key. Because in eclipselink documentation i don't see any solution to do this, there is only @Index(name="EMP_NAME_INDEX", columnNames={"F_NAME","L_NAME"})=>basic column + basic columnAnonymoushttps://www.blogger.com/profile/00344537417004214066noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-26576668512507151122015-12-14T15:58:39.869-08:002015-12-14T15:58:39.869-08:00XStream is another possibility. Whether JSON, XML ...XStream is another possibility. Whether JSON, XML or what have you it is fast and malleable. Normally it will spell out the full class name as part of the String it produces but you can use aliases to make it more like a language neutral marshaling and make the objects smaller.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-55518055888570763752015-11-24T22:48:48.374-08:002015-11-24T22:48:48.374-08:00Is there any further reading you would recommend o...Is there any further reading you would recommend on this?<br /><br />LDS Infotech<br /><a href="http://www.ldsinfotech.com/coporate-product/oracle.php" rel="nofollow">Oracle Partners India</a> <br />Anonymoushttps://www.blogger.com/profile/04916616183364529258noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-77887257736115044042015-11-24T19:05:52.226-08:002015-11-24T19:05:52.226-08:00Thanks for the post! Can you use these techniques ...Thanks for the post! Can you use these techniques to build <a href="http://www.modernanalytics.com/enterprise-data-modeling/" rel="nofollow">enterprise level data models</a>? I am not too familiar with these languages but am doing some research for a project for school. Thanks!Anonymoushttps://www.blogger.com/profile/01013321460318408995noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-26038438184982063122015-06-28T21:01:44.137-07:002015-06-28T21:01:44.137-07:00thanksthanksAnonymoushttps://www.blogger.com/profile/14282863414687033007noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-80713589316574619482015-03-04T04:37:38.753-08:002015-03-04T04:37:38.753-08:00It is very useful information. I have question for...It is very useful information. I have question for you. does eclipse Link support union with order by cluase. my sample query here is select emp from Emp emp where empId= :empId UNION select emp from Emp emp where deptId=: deptID order by emp.empID. I have tired this on it is working without Order by but when i use Order by i am getting The query contains a malformed ending.Unknownhttps://www.blogger.com/profile/06633945030260640327noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-77926968209501593492015-02-24T20:45:23.504-08:002015-02-24T20:45:23.504-08:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/05777154553719041282noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-50570718409341991232015-02-24T20:43:56.047-08:002015-02-24T20:43:56.047-08:00This comment has been removed by the author.Anonymoushttps://www.blogger.com/profile/05777154553719041282noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-21097535844560517392015-02-24T20:43:41.046-08:002015-02-24T20:43:41.046-08:00great article! helped me a lot! thank u sooooooooo...great article! helped me a lot! thank u sooooooooooo much....Anonymoushttps://www.blogger.com/profile/05777154553719041282noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-36681624511642835902015-02-18T02:00:01.422-08:002015-02-18T02:00:01.422-08:00The benchmark is unreally stupid :)
You've not...The benchmark is unreally stupid :)<br />You've not disabled the EclipseLink's shared cache.<br />It basically does NO SELECTS AT ALL! - Just returns the object cached since the moment of insertion.<br /><br />Re-test with <property name="eclipselink.cache.shared.default" value="false"/> and you'll get almost the same result as with Hibernate.Unknownhttps://www.blogger.com/profile/11775201601457597044noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-79368624156450944672015-02-18T01:59:27.971-08:002015-02-18T01:59:27.971-08:00This comment has been removed by the author.Unknownhttps://www.blogger.com/profile/11775201601457597044noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-4698380363564405072015-01-14T18:49:24.141-08:002015-01-14T18:49:24.141-08:00Will this even compile? Isn't columnList a st...Will this even compile? Isn't columnList a string? How could it accept an array?<br />@Index(name="EMP_NAME_INDEX", columnList={"F_NAME", "L_NAME"}) })mqhnow1https://www.blogger.com/profile/13632075808012539743noreply@blogger.comtag:blogger.com,1999:blog-6877629428951398731.post-89882298629677345592014-12-08T22:54:56.686-08:002014-12-08T22:54:56.686-08:00Absolutely superb!Absolutely superb!Rodrigo M. Tato Rothamelhttps://www.blogger.com/profile/08793380341440276075noreply@blogger.com