bits and pieces

March 5, 2011

Cassandra Tip: How much time did that query take?

Filed under: Uncategorized — Tags: , — roshandawrani @ 12:12 pm

If you are using Hector library to access Cassandra DB, it’s really easy to find out how much time a mutation or read query took to get executed.

All mutation operations made through Mutator – whether single or batched – return a MutationResult object, that can provide you with the following information after the query is executed:

  • getExecutionTimeMicro() – time in microseconds it took to execute the query.
  • getHostUsed() – on which host in the Cassandra ring, the query was executed

Similary for read operations, all flavors of Query return a QueryResult object that again provides the same info as above.

Useful and consistent, isn’t it?

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