Reduce the size of the search thread pool. #9165
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can we use this ((availableProcessors * 3) / 2) + 1 even though it's equivalent
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Follow-up of elastic#9135. We initially decreased the stack size because it would end up a lot of memory when there are many threads. But we also have some thread pools that may be oversized, in particular the search thread pool. This commit proposes to decrease the default search thread pool size from `3 * num_procs` to `3 * num_procs / 2 + 1`. This is large enough to be sure that we can use all the machine resources even with a search-only work load but not too large in order to not consume too much memory because of the stack size and thread locals.
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Applied the suggested change, will push soon. |
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…size Internal: reduce the size of the search thread pool.
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Follow-up of #9135. We initially decreased the stack size because it would end
up a lot of memory when there are many threads. But we also have some thread
pools that may be oversized, in particular the search thread pool.
This commit proposes to decrease the default search thread pool size from
3 * num_procsto3 * num_procs / 2 + 1. This is large enough to be surethat we can use all the machine resources even with a search-only work load
but not too large in order to not consume too much memory because of the stack
size and thread locals.