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An evaluation of whether a system works well enough to be fit for purpose. Normally performance refers to the speed with which a system completes an operation or set of operations over time.

1 vote

What can cause slow queries with low resource usage?

OK, so the problem turned out to be waits on IO after all. When gathering data to respond to Martin Smith's comment, I noticed that those fields which were slow to merge were precisely those which SET …
Max Bolingbroke's user avatar
4 votes
2 answers
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What can cause slow queries with low resource usage?

than 0.1s, indicating that we are not blocked on IO Activity Monitor confirms the IO system is lightly loaded: maximum IO response latency is only 9ms, with very low number of bytes transferred Intel Performance
Max Bolingbroke's user avatar