Sun Java System Application Server Enterprise Edition 8.1 2005Q2 Deployment Planning Guide

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### Stateful Session Bean Checkpointing

For SFSB session persistence, the load on HADB depends on the following:

- Number of SFSBs enabled for checkpointing.

- Which SFSB methods are selected for checkpointing, and how often they are used.

- Size of the session object.

- Which methods are transactional.

Checkpointing generally occurs after any transaction involving the SFSB is completed (even if the transaction rolls back).

For better performance, specify a small set of methods for checkpointing. The size of the data that is being checkpointed and the frequency of checkpointing determine the additional overhead in response time for a given client interaction.

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