Database Management for Smalltalk

Hotspot Optimisation

Hotspot Optimisation Techniques

 
Automatic object locking is satisfactory if access is random, but in some applications lock waits for frequently-accessed objects, known as ‘hotspots’, can dominate performance.

For example, in an order processing application, certain common items may be present in most orders, and worse, may well be at the top of the shopping list, causing their quantity-on-hand to be locked early in the transaction, reducing its availability to other users, effectively enforcing a serialization of transactions which could otherwise proceed concurrently.

VOSS 3.1 supports several application design techniques which may be used to optimise concurrency.



 

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