Sun Microsystems GlassFish Enterprise Server 2.1 Administration Manual page 148

Admin Console Tasks for Transactions
Restart the Enterprise Server.
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To set the keypoint interval
Keypoint operations compress the transaction log file. The keypoint interval is the number of
transactions between keypoint operations on the log. Keypoint operations can reduce the size of
the transaction log files. A larger number of keypoint intervals (for example, 2048) results in
larger transaction log files, but fewer keypoint operations, and potentially better performance.
A smaller keypoint interval (for example, 256) results in smaller log files but slightly reduced
performance due to the greater frequency of keypoint operations.
In the tree component select the Configurations node.
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Select the instance to configure:
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Select the Transaction Service node.
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Enter the number of transactions between keypoint operations in the Keypoint Interval field.
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The default value is 2048.
Click Save.
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Restart the Enterprise Server.
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148 Sun GlassFish Enterprise Server 2.1 Administration Guide • December 2008
To configure a particular instance, select the instance's config node. For example, the default
instance, server, select the server-config node.
To configure the default settings for all instances, select the default-config node.