IBM BPM, V8.0.1, All platforms > Tuning > Advanced tuning > Database: general tuning
Provide sufficient physical memory
Accessing data in memory is much faster than reading it from disk. With 64-bit hardware being readily available and memory prices continuing to fall, for many performance-critical workloads it makes sense to provision enough memory to avoid most disk reads in steady state.
Take great care to avoid virtual memory paging on the database computer. The database manages its memory with the assumption that it is never paged, and does not cooperate well if the operating system swaps some of its pages to disk.