Related to this PR, I'm puzzled by the logic to reshape the XrdBuffer pool.
It scales the buckets of memory buffers proportional to the number of requests: If 50% of the requests are for buffers of size X, it adjusts the buffer count so that 50% of the buffers are size X.
However, the adjustment process doesn't consider the amount of memory being used. Assume the application is only using 1MB buffers: 100% of requests are for 1MB buffers. The target buffer count is 100% of size 1MB, which matches the current state. Nothing is freed, regardless of how much memory is allocated. Is my reading of XrdBuffManager::Reshape() correct?
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