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 Post subject: Same Code different performance
PostPosted: Sun Apr 29, 2012 5:36 pm 
Newbie

Joined: Sun Apr 29, 2012 5:25 pm
Posts: 2
Hi all,

do you have any suggestions how I can analyze Hibernate performance problems with the same code?

I've got a Java application which runs in the Tomcat and inserts data in the database. The laptop is about ten times faster then the server - what's be quit unusual.

Java: Java 1.6_18 64 bit, Java 1.6_30 bit
Tomcat: Tomcat 6, Tomcat 7
MySQL: MySQL 5.1.43, MySQL 5.5

The laptop contained the older version - the server the newer versions. When I install the old versions on the server it doesn't get faster. When I install the newer version on my laptop (VMWare image, except Tomcat) it's still factor 10 faster then the server.

I wrote a test program to compare the times how long it takes to insert something on my laptop and how long it takes on the server. Yet I don't have any ideas how to analyze it further.

Any ideas?


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 Post subject: Re: Same Code different performance
PostPosted: Mon Apr 30, 2012 3:10 am 
Beginner
Beginner

Joined: Tue Jul 03, 2007 8:47 am
Posts: 46
Most likely your virtual machine doesn't execute fsync-calls, which results in a huge performance boost for write-intensive workload.
However in case of a system crash you may end up with a correupted database, so its not the way to go for production servers.

lg


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 Post subject: Re: Same Code different performance
PostPosted: Mon Apr 30, 2012 5:02 am 
Newbie

Joined: Sun Apr 29, 2012 5:25 pm
Posts: 2
How can I check if the disk access makes my program slowly?

I also tested it with another laptop (no VMWare) => fast. During this test I noticed that the disk of this laptop (without VMWare Image) is faster than the disk on the server (only for small files).


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