Integration Server 10.3 | Clustering Guide | Managing Server Clustering | Increasing the Cache Size for a Stateful Cluster
 
Increasing the Cache Size for a Stateful Cluster
 
Increasing the Maximum Elements on Disk Size
If you think your Integration Server sessions will use a large portion of the distributed Terracotta Server Array cache, increase the cache size on each server in the cluster. You can increase the on-heap cache size by modifying the Maximum Elements on Disk setting (see Increasing the Maximum Elements on Disk Size). Or, if you are using BigMemory, you can modify the Maximum Off-Heap setting ( Working with Caches).