Use correct number of bytes in query cache accounting #9479
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today we use the length of the BytesReference which is misleading since the reference is paged such that the length != ramBytesUsed. This can lead to a way higher memory consuption than expected if query results are tiny since each query result requires at least 16kb. Yet, we should rethink this strategy for query results that are very small ie. less than 20% of the ramBytesUsed but this commit first tries to make the acocunting correct.
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LGTM |
clintongormley
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today we use the length of the BytesReference which is misleading since
the reference is paged such that the length != ramBytesUsed. This can lead
to a way higher memory consuption than expected if query results are tiny
since each query result requires at least 16kb. Yet, we should rethink this
strategy for query results that are very small ie. less than 20% of the ramBytesUsed
but this commit first tries to make the acocunting correct.