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Results tagged with performance
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user 186435
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.
0
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Storing the groupwise most recent related record
That takes away a lot of the hassle and performance loss during insertions, but I'm still not sure why the other queries are performing so poorly. …
0
votes
2
answers
96
views
Storing the groupwise most recent related record
The performance benefit is obviously a tradeoff, since purchase insertions will take around twice as long (I improved this significantly with a trigger below). …
2
votes
1
answer
154
views
Why is my indexed DISTINCT ON so much slower than my INNER JOIN?
I have two tables, customers and purchases. There are a lot (thousands) of purchases per customer. I usually only need the most recent purchase for each customer, which is why I have the latest_purcha …