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This is documentation for Caché & Ensemble. See the InterSystems IRIS version of this content.

For information on migrating to InterSystems IRIS, see Why Migrate to InterSystems IRIS?


Size of memory for journal buffers.


[config]    jrnbufs=n


Amount of memory allocated for journal buffers. The default is 64 MB. Increasing this setting means increasing the amount of journal data that can be held in memory, which improves journaling performance but increases the amount of journal data that could potentially be lost in the event of a system failure. If you edit this setting, you must restart Caché to apply the change.




Range of Values

8 MB (for 8–bit instances) or 16 MB (for Unicode instances) up to 1024 MB.

Management Portal

On the Advanced Memory Settings page (System Administration > Configuration > Additional Settings > Advanced memory), in the jrnbufs row, select Edit and enter a number of megabytes.