Questions tagged [cardinality-estimation]
19 questions
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Hazelcast cardinality estimator local instance
I have an incoming stream of values at a rate of a few millions per minute going through my services cluster. I would like to get a count of the unique values going through all of the instances in a given time frame. I am looking at Hazelcast's…
Myron
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hazelcast give another Cardinality Estimator object by unique name
I have a problem in getting cardinality service in hazelcast.
In following code, I add some visitor to cardinality estimator. messageID is unique. In test environment that filled by 5K unique item by this code.
public void AppendVisitor(String…
M.Ali R
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How can I test the accuracy of the the cardinality estimator when migrating between SQL Server versions?
In the near future the current the current database infrastructure is to be migrated to SQL Server 2017 from 2008R2.
Once all of the databases have been migrated to the new server I would like to upgrade the compatibility level to 140. This is to…
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3 answers
How does flajolet martin sketch works?
I am trying to understand this sketch but am not able to understand.
Correct me if I am wrong but basically, lets say I have a text data.. words.. I have a hash function.. which takes a word and create an integer hash and then I convert that hash to…
frazman
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