This section explains how to change PL/extJava.
This section explains how to add or delete a server instance (Java VM).
A server instance (Java VM) is a single Java VM. Up to 64 Java applications can be executed simultaneously on a single server instance (Java VM).
The number of Java applications that can be executed simultaneously can be extended by adding server instances (Java VM). To decrease the number of Java applications that are executed simultaneously, delete the server instances (Java VM) that were added.
Stop the instance
Refer to "2.1 Starting and Stopping an Instance" for information on how to stop the instance.
Refer to "8.11 Actions in Response to Failure to Stop an Instance" if the instance fails to stop.
Change the database cluster configuration
Change the maximum number of simultaneous instance connections (max_connections).
Refer to "7.2.3.1 Configuring Database Clusters" for information on how to change the number of simultaneous connections.
Add or delete the server instance (Java VM)
Add or delete the server instance (Java VM) using the add-instance subcommand or the delete-instance subcommand of the pgx_jadmin command.
Example
Add a server instance (Java VM)
> pgx_jadmin add-instance --dbname db01 --instanceport 26801,26802
Delete a server instance (Java VM)
> pgx_jadmin delete-instance --dbname db01
See
Refer to "pgx_jadmin" in the Reference for information on the add-instance and delete-instance subcommands.
Start the instance again
Refer to "2.1 Starting and Stopping an Instance" for information on how to start the instance.
Refer to "8.10 Actions in Response to Instance Startup Failure" if the instance fails to start.
This section explains how to change database connection information.
Stop the instance
Refer to "2.1 Starting and Stopping an Instance" for information on how to stop the instance.
Refer to "8.11 Actions in Response to Failure to Stop an Instance" if the instance fails to stop.
Change the database connection information
Use the modify-container-db subcommand of the pgx_jadmin command to change the database connection information.
You can change the following database connection information:
Instance port number
User name used for database connection
User password used for database connection
Example
If changing the name of the user connecting to the database to "user02"
> pgx_jadmin modify-container-db --dbname db01 --dbuser user02
See
Refer to "pgx_jadmin" in the Reference for information on the modify-container-db subcommand.
Start the instance again
After changing the instance connection information, start the instance.
Refer to "2.1 Starting and Stopping an Instance" for information on how to start the instance.
Refer to "8.10 Actions in Response to Instance Startup Failure" if the instance fails to start.
This section explains how to change the domain management port numbers, or the port numbers for managing a server instance (Java VM).
Changing the domain management port numbers
Stop the instance
Refer to "2.1 Starting and Stopping an Instance" for information on how to stop the instance.
Refer to "8.11 Actions in Response to Failure to Stop an Instance" if the instance fails to stop.
Check the port numbers before they are changed
Use the list-domain subcommand of the pgx_jadmin command to check the port numbers before they are changed.
Example
> pgx_jadmin list-domain
See
Refer to "pgx_jadmin" in the Reference for information on the list-domain subcommand.
Change the domain management port numbers
Use the modify-domain-port subcommand of the pgx_jadmin command to change the port numbers.
Example
If changing the domain management port numbers to "26600,26601,26602"
> pgx_jadmin modify-domain-port --domainport 26600,26601,26602
See
Refer to "pgx_jadmin" in the Reference for information on the modify-domain-port subcommand.
Check the port numbers after changing them
Use the list-domain subcommand of the pgx_jadmin command to check that the port numbers were changed.
Start the instance again
Refer to "2.1 Starting and Stopping an Instance" for information on how to start the instance.
Refer to "8.10 Actions in Response to Instance Startup Failure" if the instance fails to start.
Changing the server instance (Java VM) management port numbers
Stop the instance
Refer to "2.1 Starting and Stopping an Instance" for information on how to stop the instance.
Refer to "8.11 Actions in Response to Failure to Stop an Instance" if the instance fails to stop.
Check the port numbers before they are changed
Use the list-container subcommand of the pgx_jadmin command to check the port numbers before they are changed.
Example
> pgx_jadmin list-container --dbname db1
See
Refer to "pgx_jadmin" in the Reference for information on the list-container subcommand.
Change the server instance (Java VM) management port numbers
Use the modify-instance-port subcommand of the pgx_jadmin command to change the port numbers.
Example
To change the server instance (Java VM) management port numbers to "26701,26702"
> pgx_jadmin modify-instance-port --instance db1-1 --instanceport 26701,26702
See
Refer to "pgx_jadmin" in the Reference for information on the modify-instance-port subcommand.
Check the port numbers after changing them
Use the list-container subcommand of the pgx_jadmin command to check that the port numbers were changed.
Start the instance again
Refer to "2.1 Starting and Stopping an Instance" for information on how to start the instance.
Refer to "8.10 Actions in Response to Instance Startup Failure" if the instance fails to start.
