In a Java project, I am using an ojdbc6 jar
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0.1.0</version>
<scope>compile</scope>
</dependenc>
The first time for a day I run, dataSource.getConnection() is fast. Second time is usually okay. The next few times take around 45 seconds. After that, it takes multiple minutes. Once I have the FIRST connection of a given application run, any new connections I get are very very fast. This delay is only getting the FIRST connection for a given run.
What is making getting my first connection so slow?
I am watching netstat and don’t see any connection hanging after a successful run. Have tried several different connection pools (DBCP, C3PO) with no luck. Debugging through source code, the delay is 100% on the line of org.springframework.jdbc.datasource.DataSourceUtils:
Connection con = dataSource.getConnection();
Any ideas?
Edited For More Details
1) I am using a connection pool (DBCP or C3PO) which saves connections for future use. When I talk about getting a new connection, I mean while the first connection is in use.. I need to go to the DB and get a NEW connection. Of course I can return and get my same connection from the connection pool over and over again. But getting a second at the same time is also fast.
2) I do not know how many connections my DB lets me be logged in with. Any idea where this property is in oracle?
Was due to java using /dev/random instead of /dev/urandom to make a ssh connection with the database…. switching to /dev/urandom fixed this