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I installed oracle-xe-11.2.0-1.0.x86_64.rpm on Fedora 17-64-bit. I was wondering why it is very slow, for example when I want to connect to it using Oracle SQL Developer or JDBC in my web application.

Are there any configuration for Fedora or Oracle Express 11 to improve my performance?

I mention that my machine specification is good (8GB RAM , Core i5 CPU).

I installed an Oracle Express on Windows using VirtualBox and when I wanted to connect to it from my Fedora it was slow but when I connected to it locally (in Windows) it connected very fast!

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Please don't cross-post (Same Q on SO: stackoverflow.com/questions/14009677/…). Also you'll need to explain in more detail what "slow" means. What exactly is taking a lot of time? – Mat Dec 23 '12 at 8:42
I cross-post this question because it relate to this site and i wanted both user of sited see my question. – Saeed Zarinfam Dec 23 '12 at 9:04
Well don't. It's off-topic on Stack Overflow anyway. And without any more details, it's not answerable. – Mat Dec 23 '12 at 9:05
when i wanted to connect to it using "Oracle SQL Developer", it took about 1 minute. – Saeed Zarinfam Dec 23 '12 at 9:06
People spend careers learning how to optimize databases, it is a hard topic. The first thing you could do is be more specific; how big is the DB, how many reads/writes per second? How many clients? etc. etc. Since you're using oracle you should be able to find a consultant easily enough if money is not a concern. – Steve Kemp Dec 23 '12 at 9:24
up vote 2 down vote accepted

I disabled "firewall" and "SELinux Default Enforcing" and then the problem was solved. I also added Device name (or host name, e.g. saeed-pc) into hosts file (located in /etc/hosts):       localhost.localdomain localhost saeed-pc
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