Configure JVM Options
You can configure the JVM options for your Hub instance. These options let you manage behavioral, garbage collection, performance, and debugging options for your server. These parameters cannot be updated in the Hub user interface.
Hub stores JVM options in an internal file named hub.jvmoptions
.
Every time you start the Hub service, Hub reads this file and applies the parameters that are stored in this configuration to the Hub instance.
There are two methods that you can use to update these parameters:
Method | Description |
---|---|
Update the parameter temporarily. | You can pass the JVM option on a temporary basis as an ad hoc start parameter.
The value for the parameter is set for the current run only.
The hub.jvmoptions file is not updated, so when you restart your Hub instance without the start parameter, the parameter resets to the value that is stored in the configuration.
Use this option to test changes to your environment before you apply them on a persistent basis. |
Update the parameter on a persistent basis. | To change the value of a parameter on a persistent basis, you can update the JVM option in the hub.jvmoptions file. |
Update Parameters Temporarily
When you want to modify a JVM option on a temporary basis, you can use an ad hoc parameter in the service start command.
This method bypasses the hub.jvmoptions
file and runs Hub with the specified parameters.
Subsequent starts that do not specify the ad hoc parameter use the JVM options that are stored in the configuration file.
To pass a JVM option as an ad hoc parameter:
- Stop the Hub service.
- In a command-line interface, change the directory to
<hub_home>/bin
. - Enter the
hub.sh start
command, followed by all of the settings that you want to pass to the Hub database on start.- Use the
--J
prefix to pass the settings as ad hoc parameters. - Follow the prefix with a JVM option. Do not add any spaces between the prefix and the option. The symbol that precedes the option determines how it is applied.
hub.sh start --J-XX:+HeapDumpOnOutOfMemoryError --J-Xmx1024m
- Use the
To run Hub with the previous settings, restart the service without passing any custom parameters.
Update Parameters on a Persistent Basis
When you want to update a JVM option on a persistent basis, update the hub.jvmoptions
file.
You can update the file programmatically, or manually change the settings in the file.
To update JVM options programmatically:
- Stop the Hub service.
- In a command-line interface, change the directory to
<hub_home>/bin
. - Enter the
hub.sh configure
command, followed by all of the JVM options that you want to update in the configuration file. The symbol that precedes the option determines how it is applied.- Add an option to the configuration file with the
-
symbol. - Remove an option from the configuration file with the
+
symbol. If you specify a value, the corresponding option is only removed if it has exactly the same value.
hub.sh configure -J-XX:+HeapDumpOnOutOfMemoryError -J-Xmx1024m
- Add an option to the configuration file with the
- Start the Hub service.
If you prefer not to modify the file from the command line, you can edit the hub.jvmoptions
file manually.
This file is created automatically when you modify the default configuration.
The location of the file depends on the distribution type of your Hub installation.
- For a ZIP distribution, the file is located in the
<Hub Installation Directory>\conf
directory. - For an MSI distribution the file is located in the
%programdata%\JetBrains\Hub\conf
directory.
If you have not changed the JVM options for your server, the directory contains a sample configuration file.
The sample configuration file uses the .dist
extension and contains a list of default JVM options.
If the file you want to edit does not exist:
- Copy the hub.jvmoptions.dist file and save it as hub.jvmoptions
or - Create a hub.jvmoptions file in this directory and paste the contents of the sample configuration file into it.
You can then edit the contents of the file to configure the JVM options.
To update JVM options manually:
- Stop the Hub service.
- Open the
hub.jvmoptions
file. - Edit the JVM options directly in the file.
- Save and close the file.
- Start the Hub service.
Default JVM Options
The following JVM options are configured for your Hub instance by default.
-ea
-XX:+HeapDumpOnOutOfMemoryError
-XX:+HeapDumpOnOutOfMemoryError
-XX:ErrorFile=%\APP_LOGS_DIR%\%\FILE_SEPARATOR%\hs_err_pid%\%\p.log
-Dfile.encoding=UTF-8
*Djava.awt.headless=true
-XX:MaxPermSize=150m
-XX:MaxMetaspaceSize=150m
-Xmx600m
-Dorg.eclipse.jetty.server.Request.maxFormContentSize=5000000
-Dorg.eclipse.jetty.server.Request.maxFormKeys=10000