IBM BPM, V8.0.1, All platforms > Tuning > Tuning parameters
Messaging engine properties
Two message engine custom properties can impact the messaging engine performance.
The DiscardableDataBufferSize property denotes the size in bytes of the data buffer used when processing best effort non persistent messages. The purpose of the discardable data buffer is to hold message data in memory as it is never written to the data store for this quality of service. Messages that are too large to fit into this buffer are discarded.
The CachedDataBufferSize property denotes the size in bytes of the data buffer used when processing all messages other than best effort non persistent messages. The purpose of the cached data buffer is to optimize the performance by caching in memory data that might otherwise need to be read from the data store.
To set the DiscardableDataBufferSize and CachedDataBufferSize properties from the administrative console, navigate to Service Integration > Buses > bus_name > Messaging Engines > messaging_engine_name > Additional properties > Custom properties.