CODEWITHSUNDEEP
javamultithreadingthreadpool
Michael
Michael

Reputation: 42050

How to choose thread pool size?

Suppose I have to read, process and update a lot of files in Java. I am going to use one computer with 16 cores. Since I have both IO-bound (read and update files) and CPU-bound (processing) tasks I allocate 2 thread pools.

I would allocate one pool for CPU-bound tasks with 16 threads (the number of threads == the number of CPUs). Now I wonder what the IO-bound pool size is. Thread pools of what sizes would you suggest ?

Upvotes: 1

Views: 1495

Answers (1)

KnownColor
KnownColor

Reputation: 449

It would depend on your storage capabilities and what kinds of IO you are trying to do. For example, long sequential writes on harddisks would favor a single IO thread, but you would want to scale this according to your requirements.

In this answer, https://stackoverflow.com/a/2821025/2855891, BlackAura explains why experimentation and profiling is probably the only way you can really find out.

There are probably already very good articles on this topic.

Upvotes: 4

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