Increasing the number of item tables for a messaging engine when tables are not automatically created

If a concurrency bottleneck occurs on the item tables, increasing the number of item tables will increase the throughput of the messaging engine. Before performing this task verify the messaging engine is using a data store, and that its Create tables option is set to False.

 

1. Relevant performance monitoring tools show that the throughput of a messaging engine is inefficient.

2. Use the database performance monitoring tools to examine lock statistics for the item tables for evidence of a bottleneck. Consult database documentation on how to interpret the locking statistics.

3. Create tables and increase data store attributes.

   • Create tables for the data store schema.

     See see Create data store tables

   • Increase number of permanent tables or temporary tables, or both, for the data store.

     See see Configure a messaging engine data store to use a data source

   We can only increase the number of permanent tables or temporary tables, not decrease them.

4. Stop and restart the WAS so that configuration changes take effect. The extra tables are used when the messaging engine restarts.

5. Observe the effect on throughput and lock statistics by checking performance monitoring tools. Consider whether any improvement is sufficient and modifying the data store attributes further would be beneficial

   

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Last updated Nov 10, 2010 8:23:07 PM CST